Extension for a Modbus RTU connection

The heat pump manager can communicate with external systems via the LWPM 410 extension, which is available as an accessory. The Modbus protocol, which is freely available on the market and can be implemented on other bus systems, serves as the interface protocol. It should be noted that over 100 variables can be transferred to the extension, which can be read out individually or transferred to a higher-level bus system.

LWPM 410 extension
Order reference	LWPM 410
item number	339410
Device type	Slave
protocol	RTU
baud rate	1200, 2400, 4800, 9600, 19200
Data format software version <L23	8N1
Data bits	8th
Parity	None
Stop bits	1
Data format software version> L23	8N1, 8N2, 8O1, 8O2, 8E1, 8E2
Data bits	8th
Parity	None, Even, Odd
Stop bits	1, 2
Network address	1 ... 207
interface	RS485
Cable sizing	2 x 0.5 mm² shielded max.50m
Connection type	Screw terminals

1 System requirement

The minimum system requirement for using the LWPM 410 extension is a Dimplex heat pump with heat pump manager WPM 2006, WPM 2007 or WPM EconPlus with software version H_H50 and higher.

2 Modbus / RTU

The Modbus protocol is a communication protocol based on the master / slave principle. A master device controls and monitors the entire data transmission in the network / bus system, the connected slave devices only respond when requested. The Dimplex heat pump manager can process the Modbus protocol in RTU mode.

3 Function codes supported

Type	R / W	Function code	Modbus function
Digital	R.	01 (0x01)	Read coils
Digital	R.	02 (0x02)	Read Discrete Inputs
Analogue	R.	03 (0x03)	Read Holding Register
Analogue	R.	04 (0x04)	Read input register
Digital	W.	05 (0x05)	Write single coil
Analogue	W.	06 (0x06)	Write single register

4 installation

ATTENTION
Before opening the device, all circuits must be disconnected from the power supply. All electrical connection work may only be carried out by a qualified electrician or a specialist for specified activities in compliance with the installation and operating instructions.

The installation of the LWPM 410 extension takes place on the heat pump manager in the designated slot “Serial Card / BMS Card”. The following steps are carried out:

De-energize the heat pump manager

Dimplex Wiki > Modbus RTU connection (EN) > El_wmp_1.png

Remove the cover of the “Serial Card / BMS Card” slot with a small screwdriver

Dimplex Wiki > Modbus RTU connection (EN) > El_wmp_2.png

Installation of the LWPM extension

Dimplex Wiki > Modbus RTU connection (EN) > El_wmp_3.png

Breaking out the existing cover

Dimplex Wiki > Modbus RTU connection (EN) > El_wmp_4.png

Close the opening with the enclosed cover

Supply the heat pump manager with voltage

5 Heat pump manager settings

Depending on the software version on the heat pump manager, the following settings must be checked and adjusted if necessary:

from WPM_H with the key combinations «menu" and "Enter » in the "Modem" settings
from WPM_L with the key «menu»In the" Network "settings
- Protocol: Modbus
- Baud rate: 9600 → factory setting, adapt to the network if necessary
- Address: 001 → factory setting, if necessary adapt to the end devices in the network
from WPM_L20.2 with the key «menu»In the" Network "settings
- Protocol: Modbus
- Baud rate: 9600 → factory setting, adapt to the network if necessary
- Address: 001 → factory setting, if necessary adapt to the end devices in the network
- Address range: 1..127 → absolutely required
ab WPM_M1.3
- Protocol: Modbus
- Baud rate: 9600 → factory setting, adapt to the network if necessary
- Address: 001 → factory setting, if necessary adapt to the end devices in the network
- Address range: 1 … 207 → absolutely required

6 Data point list

6.1 Operating data

Software heat pump manager	WPM software J/L/M		WPM software H
	Address			Datapoint type	COIL/REG	R/W	Unit
Address range	1 … 127	1 … 207	-
Description
Outside temperature (R1)	1		27	16 bit float	register	R.	° C
Return temperature (R2)	2		29	16 bit float	register	R.	° C
Return temperature setpoint	53		28	16 bit float	register	R.	° C
Hot water temperature (R3)	3		30th	16 bit float	register	R.	° C
Set hot water temperature	58		40	16 bit float	register	R.	° C
Flow temperature (R9)	5		31	16 bit float	register	R.	° C
Heat source inlet temperature (R24) *	6		-	16 bit float	register	R.	° C
Heat source outlet temperature (R6)	7		41	16 bit float	register	R.	° C
Target temperature 2nd heating circuit	54		32	16 bit float	register	R.	° C
Temperature 2nd heating circuit (R5)	9		33	16 bit float	register	R.	° C
Target temperature 3rd heating circuit	55		34	16 bit float	register	R.	° C
Temperature 3rd heating circuit (R13)	10		35	16 bit float	register	R.	° C
Room temperature 1 / RT-RTH Econ	11		36	16 bit float	register	R.	° C
Room temperature 2	12		38	16 bit float	register	R.	° C
Room humidity 1 / RT-RTH Econ	13		37	16 bit float	register	R.	° C
Room humidity 2	14		39	16 bit float	register	R.	° C
Passive cooling
Flow temperature (R11)	19		42	16 bit float	register	R.	° C
Return temperature (R4)	20		43	16 bit float	register	R.	° C
Passive / active cooling
Return temp. according to primary circuit (R24)	21		-	16 bit float	register	R.	° C
Solar
Collector sensor (R23)	10		-	16 bit float	register	R.	° C
Solar storage tank (R22)	23		-	16 bit float	register	R.	° C
Ventilation
Outside air temperature	120		-	16 bit float	register	R.	° C
Supply air temperature	121		-	16 bit float	register	R.	° C
Exhaust air temperature	122		-	16 bit float	register	R.	° C
Exhaust air temperature	123		-	16 bit float	register	R.	° C
Speed of supply air fan	125		-	16 bit float	register	R.	1 / min
Exhaust fan speed	126		-	16 bit float	register	R.	1 / min

*NOTE
The heat source inlet is only available for heat pumps with an electronic expansion valve.

6.2 history

Address range	1 … 127	1 … 207
	Address			Datapoint type	COIL/REG	R/W	Unit
Software heat pump manager	WPM software J/L/M		WPM software H
Description
Compressor 1	72		64	unsigned 16 bit	register	R.	hour
Compressor 2	73		65	unsigned 16 bit	register	R.	hour
Primary pump / fan (M11)	74		66	unsigned 16 bit	register	R.	hour
2nd heat generator (E10)	75		67	unsigned 16 bit	register	R.	hour
Heating pump (M13)	76		68	unsigned 16 bit	register	R.	hour
Hot water pump (M18)	77		69	unsigned 16 bit	register	R.	hour
Flange heating (E9)	78		70	unsigned 16 bit	register	R.	hour
Swimming pool pump (M19)	79		71	unsigned 16 bit	register	R.	hour
Additional circulation pump (M16)	71 from L12		-	unsigned 16 bit	register	R.	hour
Amount of heat^* Heating 1-4	223	303	228	unsigned 16 bit	register	R.	kWh
Amount of heat^* Heating 5-8	224	304	229	unsigned 16 bit	register	R.	kWh
Amount of heat^* Heating 9-12	225	305	230	unsigned 16 bit	register	R.	kWh
Amount of heat^* Hot water 1-4	226	306	231	unsigned 16 bit	register	R.	kWh
Amount of heat^* Hot water 5-8	227	307	232	unsigned 16 bit	register	R.	kWh
Amount of heat^* Hot water 9-12	228	308	233	unsigned 16 bit	register	R.	kWh
Amount of heat^* Swimming pool 1-4	229	309	234	unsigned 16 bit	register	R.	kWh
Amount of heat^* Swimming pool 5-8	230	310	235	unsigned 16 bit	register	R.	kWh
Amount of heat^* Swimming pool 9-12	231	311	236	unsigned 16 bit	register	R.	kWh

*NOTE
A quantity of heat can only be output for heat pumps with pressure sensors or an external heat meter WMZ!

6.2.1 Example of heat quantities^*

The heat quantities are made up of 3 indices. These 3 indices have to be combined with the following formula for the amount of heat.

Heat amount heating = (heat amount heating 9-12 * 100000000) + (heat amount heating 5-8 * 10000) + heat amount heating 1-4

The amount of heat for "hot water" and "swimming pool" is determined according to this description. However, the corresponding data point is used here.

6.3 settings

6.3.1 1st heating circuit

	Address			Datapoint Typ	COIL/REG	R/W	Range		Unit
Software heat pump manager	WPM-Software J/L/M		WPM-Software H				Range
Adress range	1 … 127	1 … 207	-				Min.	Max.
Description							Min.	Max.
Parallel shift	163	243	129	uint16	Register	R/W	0	38
							0: -19 1: -18 2: -17 3: -16 4: -15 5: -14 6: -13 7: -12 8: -11 9: -10 10: -9 11: -8 12: -7 13: -6 14: -5 15: -4 16: -3 17: -2 18: -1 19: 0	20: 1 21: 2 22: 3 23: 4 24: 5 25: 6 26: 7 27: 8 28: 9 29: 10 30: 11 31: 12 32: 13 33: 14 34: 15 35: 16 36: 17 37: 18 38: 19
Room temperature	46		21	uint16	Register	R/W	15.0	30.0	°C
Fixed setpoint temperature	164	244	130	uint16	Register	R/W	18	60	°C
Heating curve end point	165	245	142	uint16	Register	R/W	20	70	°C
Hysteresis	47		22	uint16	Register	R/W	0.5	5.0	K
Hysteresis	170	-	151	uint16	Register	R/W	10	35	°C
Target temp. dyn. cooling	-	341	-	uint16	Register	R/W	10	35	°C

6.3.2 2nd / 3rd heating circuit

In order to be able to make changes to the 2nd or 3rd heating circuit, the changeover must take place via an address. After switching over this address, it is possible to change parameters in the desired heating circuit without any problems.

* ProgrammingNOTE
When selecting the 2nd heating circuit, the value 2 is initially sent to address 209. The required values for the 2nd heating circuit can then be changed. Analogous to the description, this is done with the 3rd heating circuit and the value 3.

	Address		Datapoint Typ	COIL/REG	R/W	Range		Unit
Software heat pump manager	WPM-Software H/J/L/M	WPM-Software J/L/M				Range
Adress range	1 … 127	1 … 207				Min.	Max.
Description						Min.	Max.
Select heating circuit 2/3	209	289	uint16	Register	R/W	2	3
						2 = 2.Heizkreis 3 = 3.Heizkreis
Heating curve end point	211	291	uint16	Register	R/W	20	70	°C
Fixed value temperature	212	292	uint16	Register	R/W	20	60	°C
Parallel shift	213	293	uint16	Register	R/W	0	38
						0: -19 1: -18 2: -17 3: -16 4: -15 5: -14 6: -13 7: -12 8: -11 9: -10 10: -9 11: -8 12: -7 13: -6 14: -5 15: -4 16: -3 17: -2 18: -1 19: 0	20: 1 21: 2 22: 3 23: 4 24: 5 25: 6 26: 7 27: 8 28: 9 29: 10 30: 11 31: 12 32: 13 33: 14 34: 15 35: 16 36: 17 37: 18 38: 19
Mixer runtime	214	294	uint16	Register	R/W	1	6	min
Mixer hysteresis	93		uint16	Register	R/W	0.5	2.0	K
Mixer hysteresis	215	295	uint16	Register	R/W	30	70	°C
Maximum temperature	216	296	uint16	Register	R/W	0	30	°C
Cooling set room temperature						0: 15.0 1: 15.5 2: 16.0 3: 16.5 4: 17.0 5: 17.5 6: 18.0 7: 18.5 8: 19.0 9: 19.5 10: 20.0 11: 20.5 12: 21.0 13: 21.5 14: 22.0 15: 22.5	16: 23.0 17: 23.5 18: 24.0 19: 24.5 20: 25.0 21: 25.5 22: 26.0 23: 26.5 24: 27.0 25: 27.5 26: 28.0 27: 28.5 28: 29.0 29: 29.5 30: 30.0	°C

6.3.3 Mode

	Address			Datapoint Typ	COIL/REG	R/W	Range
Software heat pump manager	WPM-Software J/L/M		WPM-Software H				Range
Adress range	1 … 127	1 … 207	-				Min.	Max.
Description							Min.	Max.
operation mode	142	222	134	uint16	Register	R/W	0	5
							0: summer 1: auto 2: vacation 3: party 4: 2nd heat generator 5: cooling
Number of party hours	143	223	135	uint16	Register	R/W	0	72
Number of vacation days	144	224	136	uint16	Register	R/W	0	150
Ventilation
Stages	161	241	-	uint16	Register	R/W	0	5
							0: off 1: automatic 2: level 1 3: level 2 4: level 3 5: intermittent ventilation
Time value burst ventilation	127		-	uint16	Register	R/W	15	90

NOTE
To use the ventilation function, a ventilation device of the ZL ... V (F) series with Modbus RTU connection to the heat pump manager is required.

6.3.4 Hot water

	Address			Datapoint Typ	COIL/REG	R/W	Range		Unit
Software heat pump manager	WPM-Software J/L/M		WPM-Software H				Range
Adress range	1 … 127	1 … 207	-				Min.	Max.
Description							Min.	Max.
Hysteresis	172	252	131	uint16	Register	R/W	2	15	K
Target temperature	174	254	149	uint16	Register	R/W	Minimum temp.	85	°C
Target temperature minimum	-	352	-	uint16	Register	R/W	10	Target temp.	°C
Target temperature maximum	175	255	-	uint16	Register	R/W	Target temp.	85	°C

6.3.5 Swimming pool

	Address			Datapoint Typ	COIL/REG	R/W	Range		Unit
Software heat pump manager	WPM-Software J/L/M		WPM-Software H				Range
Adress range	1 … 127	1 … 207	-				Min.	Max.
Description							Min.	Max.
Hysteresis	176	256	-	uint16	Register	R/W	1	20	K
Target temperature	178	258	-	uint16	Register	R/W	5	60	°C

6.3.6 2. Heat generator

	Address			Datapoint Typ	COIL/REG	R/W	Range		Unit
Software heat pump manager	WPM-Software J/L/M		WPM-Software H				Range
Adress range	1 … 127	1 … 207	-				Min.	Max.
Description							Min.	Max.
Mixer hysteresis	48		20	uint16	Register	R/W	0.5	2.0	K
Limit temperature parallel	147	227	19	uint16	Register	R/W	-25	35	°C
Mixer runtime	148	228	37	uint16	Register	R/W	30	85	min

6.4 Selection of time functions

Access to the time functions, e.g. for blocking, lowering / increasing values or times, is achieved by switching over the address 192 (Modbus IP 5065).

* ProgrammingNOTE
To change a reduction or increase value for the 1st heating circuit, the value 1 for reduction or 2 for increase is sent to address 192 (Modbus IP 5065). The required values for the 1st heating circuit can then be changed. Analogous to the description, this is done with the 2nd and 3rd heating circuit or blocks for e.g. hot water and swimming pool preparation.

6.4.1 Lowering / raising

	Address		Datapoint Typ	COIL/REG	R/W	Range		Unit
Software heat pump manager	WPM-Software H/J/L/M	WPM-Software J/L/M				Range
Adress range	1 … 127	1 … 208				Min.	Max.
Description						Min.	Max.
1st heating circuit
Subsidence	192	272	uint16	Register	R/W	1	1
Raising	192	272	uint16	Register	R/W	2	2
2nd heating circuit
Subsidence	192	272	uint16	Register	R/W	3	3
Raising	192	272	uint16	Register	R/W	4	4
3rd heating circuit
Subsidence	192	272	uint16	Register	R/W	5	5
Raising	192	272	uint16	Register	R/W	6	6
Time function
Start hour 1	193	273	uint16	Register	R/W	0	23	hour
Start minute 1	194	274	uint16	Register	R/W	0	59	min
End of hour 1	195	275	uint16	Register	R/W	0	23	hour
End of minute 1	196	276	uint16	Register	R/W	0	59	min
Start hour 2	197	277	uint16	Register	R/W	0	23	hour
Start minute 2	198	278	uint16	Register	R/W	0	59	min
End of lesson 2	199	279	uint16	Register	R/W	0	23	hour
End of minute 2	200	280	uint16	Register	R/W	0	59	min
Sunday	201	281	uint16	Register	R/W	0	3
Monday	202	282	uint16	Register	R/W	0	3
Tuesday	203	283	uint16	Register	R/W	0	3
Wednesday	204	284	uint16	Register	R/W	0	3
Thursday	205	285	uint16	Register	R/W	0	3
Friday	206	286	uint16	Register	R/W	0	3
Saturday	207	287	uint16	Register	R/W	0	3
						0: yes 1: no 2: time 1 3: time 2
Reduction / increase value	208	288	uint16	Register	R/W	0	19	K
Active time 1	125		boolean	Coil	R	0	1	no
Active time 2	126		boolean	Coil	R	0	1	no

6.4.2 Hot water block

Software heat pump manager	WPM-Software H/J/L/M	WPM-Software J/L/M				Range
	Address		Datapoint Typ	COIL/REG	R/W	Range		Unit
Adress range	1 … 127	1 … 208				Min.	Max.
Description						Min.	Max.
Hot water block	192	272	uint16	Register	R/W	7	7
Time function
Start hour 1	193	273	uint16	Register	R/W	0	23	hour
Start minute 1	194	274	uint16	Register	R/W	0	59	min
End of hour 1	195	275	uint16	Register	R/W	0	23	hour
End of minute 1	196	276	uint16	Register	R/W	0	59	min
Start hour 2	197	277	uint16	Register	R/W	0	23	hour
Start minute 2	198	278	uint16	Register	R/W	0	59	min
End of lesson 2	199	279	uint16	Register	R/W	0	23	hour
End of minute 2	200	280	uint16	Register	R/W	0	59	min
Sunday	201	281	uint16	Register	R/W	0	3
Monday	202	282	uint16	Register	R/W	0	3
Tuesday	203	283	uint16	Register	R/W	0	3
Wednesday	204	284	uint16	Register	R/W	0	3
Thursday	205	285	uint16	Register	R/W	0	3
Friday	206	286	uint16	Register	R/W	0	3
Saturday	207	287	uint16	Register	R/W	0	3
						0: yes 1: no 2: time 1 3: time 2
Active time 1	125		boolean	Coil	R	0	1	no
Active time 2	126		boolean	Coil	R	0	1	no

6.4.3 Thermal disinfection

Software heat pump manager	WPM-Software H/J/L/M	WPM-Software J/L/M				Range
	Address		Datapoint Typ	COIL/REG	R/W	Range		Unit
Adress range	1 … 127	1 … 208				Min.	Max.
Description						Min.	Max.
Thermal disinfection	192	272	uint16	Register	R/W	8	8
Time function
Start hour	193	273	uint16	Register	R/W	0	23	hour
Start minute	194	274	uint16	Register	R/W	0	59	min
Sunday	201	281	uint16	Register	R/W	0	1
Monday	202	282	uint16	Register	R/W	0	1
Tuesday	203	283	uint16	Register	R/W	0	1
Wednesday	204	284	uint16	Register	R/W	0	1
Thursday	205	285	uint16	Register	R/W	0	1
Friday	206	286	uint16	Register	R/W	0	1
Saturday	207	287	uint16	Register	R/W	0	1
						0: yes 1: no
Temperature	208	288	uint16	Register	R/W	60	85	°C
Active time	125		boolean	Coil	R	0	1	no

6.4.4 DHW circulation pump

Software heat pump manager	WPM-Software H/J/L/M	WPM-Software J/L/M				Range
	Address		Datapoint Typ	COIL/REG	R/W	Range		Unit
Adress range	1 … 127	1 … 208				Min.	Max.
Description						Min.	Max.
Circulation pump	192	272	uint16	Register	R/W	12	12
Time function
Start hour 1	193	273	uint16	Register	R/W	0	23	hour
Start minute 1	194	274	uint16	Register	R/W	0	59	min
End of hour 1	195	275	uint16	Register	R/W	0	23	hour
End of minute 1	196	276	uint16	Register	R/W	0	59	min
Start hour 2	197	277	uint16	Register	R/W	0	23	hour
Start minute 2	198	278	uint16	Register	R/W	0	59	min
End of lesson 2	199	279	uint16	Register	R/W	0	23	hour
End of minute 2	200	280	uint16	Register	R/W	0	59	min
Sunday	201	281	uint16	Register	R/W	0	3
Monday	202	282	uint16	Register	R/W	0	3
Tuesday	203	283	uint16	Register	R/W	0	3
Wednesday	204	284	uint16	Register	R/W	0	3
Thursday	205	285	uint16	Register	R/W	0	3
Friday	206	286	uint16	Register	R/W	0	3
Saturday	207	287	uint16	Register	R/W	0	3
						0: yes 1: no 2: time 1 3: time 2
Active time 1	125		boolean	Coil	R	0	1	no
Active time 2	126		boolean	Coil	R	0	1	no

6.4.5 Ventilation raising / Silent Mode

Software heat pump manager	WPM-Software H/J/L/M	WPM-Software J/L/M				Range
	Address		Datapoint Typ	COIL/REG	R/W	Range		Unit
Adress range	1 … 127	1 … 208				Min.	Max.
Description						Min.	Max.
Ventilation	192	272	uint16	Register	R/W	13	13
Time function
Start hour 1	193	273	uint16	Register	R/W	0	23	hour
Start minute 1	194	274	uint16	Register	R/W	0	59	min
End of hour 1	195	275	uint16	Register	R/W	0	23	hour
End of minute 1	196	276	uint16	Register	R/W	0	59	min
Start hour 2	197	277	uint16	Register	R/W	0	23	hour
Start minute 2	198	278	uint16	Register	R/W	0	59	min
End of lesson 2	199	279	uint16	Register	R/W	0	23	hour
End of minute 2	200	280	uint16	Register	R/W	0	59	min
Sunday	201	281	uint16	Register	R/W	0	3
Monday	202	282	uint16	Register	R/W	0	3
Tuesday	203	283	uint16	Register	R/W	0	3
Wednesday	204	284	uint16	Register	R/W	0	3
Thursday	205	285	uint16	Register	R/W	0	3
Friday	206	286	uint16	Register	R/W	0	3
Saturday	207	287	uint16	Register	R/W	0	3
						0: yes 1: no 2: time 1 3: time 2
Active time 1	125		boolean	Coil	R	0	1	no
Active time 2	126		boolean	Coil	R	0	1	no

6.5 Display ads

Software heat pump manager	WPM-Software L/M	WPM-Software J	WPM-Software H				Range
	Address			Datapoint Typ	COIL/REG	R/W	Range
Adress range	1 … 127 / 1 … 208		-				Min.	Max.
Description							Min.	Max.
Status reports	103	43	14	uint16	Register	R	0	30
Heat pump lock	104	59	94	uint16	Register	R	1	42
Fault messages	105	42	13	uint16	Register	R	1	31
Sensors	106	-	-	uint16	Register	R	1	27

6.5.1 Status reports

Value	Description
Value	L/M software	H/J software
0	Out	the end
1	Out	Heat pump on heating
2	Heating	Heat pump on heating
3	Swimming pool	Heat pump A swimming pool
4	Hot water	Heat pump One hot water
5	Cooling	Heat pump One heating + 2nd heat generator
6		Heat pump A swimming pool + 2nd heat generator
7		Heat pump One hot water + 2nd heat generator
8		Primary pump supply
9		Heating rinse
10	Defrost	Lock (see value for lock J software)
11	Flow monitoring	Lower limit of use
12		Low pressure limit
13		Low pressure shutdown
14		High pressure protection
15		Switching cycle lock
16		Minimum service life
17		Network load
18		Flow monitoring
19		2. Heat generator
20		Low pressure brine
21		Heat pump on defrost
22		Upper limit of use
23		External lock
24	Operating mode switchover delay	Operating mode cooling
25		Frost protection cold
26		Lead limit
27		Dew point monitor
28		Dew point
29		Passive cooling
30	Lock (see value for lock L software)

6.5.2 Lock

Value	Description
Value	L/M software	J software	H software
0
1		Application limit HT	Outside temperature
2	Volume flow	Application limit WP	Bivalent alternative
3		Regenerative	Bivalent regenerative
4			Rewind
5	Function control	Hot water reheating	Hot water
6	Application limit HT	System control	System control
7	System control	EVU lock	EVU lock
8	Cooling switchover delay
9	Pump feed	High pressure
10	Minimum service life	Low pressure
11	Network load	Flow
12	Switching cycle lock	Soft starter
13	Hot water reheating
14	Regenerative
15	EVU lock
16	Soft starter
17	Flow
18	Application limit heat pump
19	High pressure
20	Low pressure
21	Application limit heat source
23	System limit
24	Load primary circuit
25	External lock
31	Warm up
33	EvD initialization
34	2. Heat generator released
35	Fault (see value for fault messages)
36		Pump feed
37		Minimum service life
38		Network load
39		Switching cycle lock
40		Application limit heat source
41		External lock
42		2. Heat generator
43		Fault (see value for fault messages)

6.5.3 Fault messages

Value	Description
Value	L/M software	H/J software
0	no mistake	no mistake
1	Error N17.1
2	Error N17.2
3	Error N17.3	Load compressor
4	Error N17.4	Coding
5		Low pressure
6	Electronic Ex valve	Antifreeze
7		Outside sensor short circuit or break
8		Return sensor short circuit or break
9		Hot water sensor short circuit or break
10	WPIO	Frost protection sensor short circuit or break
11		2nd heating circuit sensor short circuit or break
12	Inverter	Freeze protection sensor short circuit or break
13	WQIF	Low pressure brine
14		Motor protection primary
15	Sensors	Flow
16	Low pressure brine	Hot water
17		High pressure
19	! Primary circuit	Hot gas thermostat
20	! Defrost	Application limit cooling
21	! Low pressure brine
22	! Hot water
23	! Load compressor	Temperature difference
24	! Coding
25	! Low pressure
26	! Frost protection
28	! High pressure
29	! Temperature difference
30	! Hot gas thermostat
31	! Flow

6.5.4 Sensors

Value	Description
Value	L/M software
1	Outside sensor (R1)
2	Return sensor (R2)
3	Hot water sensor (R3)
4	Coding (R7)
5	Flow sensor (R9)
6	2nd heating circuit sensor (R5)
7	3rd heating circuit sensor (R13)
8	Regenerative sensor (R13)
9	Room sensor 1
10	Room sensor 2
11	Heat source outlet sensor (R6)
12	Heat source inlet sensor (R24) *
14	Collector sensor (R23)
15	Low pressure sensor (R25)
16	High pressure sensor (R26)
17	Room humidity 1
18	Room humidity 2
19	Frost protection cold sensor
20	Hot gas
21	Return sensor (R2.1)
22	Swimming pool sensor (R20)
23	Flow sensor cooling passive (R11)
24	Return flow sensor cooling passive (R4)
26	Solar cylinder sensor (R22)
28	Demand sensor for heating (R2.2)
29	RTM Econ
30	Demand sensor cooling (R39)

*NOTE
The heat source inlet is only available for heat pumps with an electronic expansion valve.

6.6 Entrances

Software Wärmepumpenmanager	WPM-Software J/L/M	WPM-Software H
	Address		Datapoint Typ	COIL/REG	R/W
Adressbereich	1 … 127 / 1 … 207	-
Bezeichnung
Warmwassertermostat	3	57	boolean	Coil	R
Schwimmbadthermostat	4	58	boolean	Coil	R
EVU-Sperre	5	56	boolean	Coil	R
Sperre Extern	6	63	boolean	Coil	R

NOTE
The status of the input on the heat pump manager can be queried via the data point inputs. It is not possible to write to this data point!

6.7 Outputs

Software heat pump manager	WPM-Software J/L/M	WPM-Software H
	Address		Datapoint Typ	COIL/REG	R/W
Adress range	1 … 127 / 1 … 207	-
Description
Compressor 1	41	80	boolean	Coil	R
Compressor 2	42	81	boolean	Coil	R
Primary pump (M11) / fan (M2)	43	82	boolean	Coil	R
2nd heat generator (E10)	44	83	boolean	Coil	R
Heating pump (M13)	45	84	boolean	Coil	R
Hot water pump (M18)	46	85	boolean	Coil	R
Mixer (M21) open	47	86	boolean	Coil	R
Mixer (M21) CLOSED	48	87	boolean	Coil	R
Additional circulation pump (M16)	49	88	boolean	Coil	R
Flange heating (E9)	50	89	boolean	Coil	R
Heating pump (M15)	51	90	boolean	Coil	R
Mixer (M22) open	52	91	boolean	Coil	R
Mixer (M22) closed	53	92	boolean	Coil	R
Swimming pool pump (M19)	56	95	boolean	Coil	R
Collective fault message (H5)	57	-	boolean	Coil	R
Heating pump (M14)	59	94	boolean	Coil	R
Cooling pump (M17)	60	99	boolean	Coil	R
Heating pump (M20)	61	-	boolean	Coil	R
Changeover room thermostats heating / cooling (N9)	66	96	boolean	Coil	R
Primary pump cooling (M12)	68	98	boolean	Coil	R
Solar pump (M23)	71	-	boolean	Coil	R

NOTE
In the event of a change, the status of the output is sent by the heat pump manager via the data points outputs. It is not possible to write to this data point!

6.8 Time alignment

Using the time synchronization, it is possible to write the current date and time via the interface. So that the change is accepted by the heat pump manager, the value 1 must be written to the associated "set register" immediately after the time has been written. Only then will the change be applied. The value of the "set register" is automatically reset to the value 0 after writing.

Description							Min.	Max.
	Address			Datapoint Typ	COIL/REG	R/W	Range
Software heat pump manager	WPM-Software J/L/M		WPM-Software H
Adress range	1 … 127	1 … 207	-
Hour	133	213	155	uint16	Register	R/W	0	23
set Sour	102		130	boolean	Coil	W
Minute	134	214	156	uint16	Register	R/W	0	59
set Minute	103		131	boolean	Coil	W
Month	135	215	157	uint16	Register	R/W	1	12
set Month	105		133	boolean	Coil	W
Weekday	136	216	158	uint16	Register	R/W	1	7
							1: Monday 2: Tuesday 3: Wednesday 4: Thursday 5: Friday 6: Saturday 7: Sunday
set day of the week	107		135	boolean	Coil	W
Day	137	217	159	uint16	Register	R/W	1	31
set Day	104		132	boolean	Coil	W
Year	138	218	160	uint16	Register	R/W	0	99
set Year	106		134	boolean	Coil	W

*NOTE
A time comparison is only possible from software versions J/L/M.

7 Function descriptions

In this chapter some functional descriptions, the implementation and recommendations are collected and explained.

7.1 Smart-Grid / SG Ready

The use of photovoltaic electricity ultimately represents a load-variable tariff, since the heat pump can be operated with inexpensive electricity with photovoltaic yield. In this case, a digital input for "green" electricity can be connected on the heat pump manager. In this operating state, the heat pump runs in increased mode for room heating (return target temperature + increase value) and hot water preparation (maximum temperature hot water). The possibility of release via the available interfaces is also given from heat pump manager software version L20.2. The wiring of the digital input is then not required to enable the function.

7.1.1 Operating states

Condition	Address		Description	action
Condition	3	4	Description	action
Red	0	1	In this state, the heat pump runs in reduced mode for space heating and hot water generation.	the adjustable reduction value of the respective heating circuit applies to room heating The adjustable minimum hot water temperature applies to hot water generation
yellow	0	0	In this state, the heat pump runs in the set normal mode.
green	1	0	In this state, the heat pump runs in increased mode for space heating and hot water preparation.	the adjustable increase value of the respective heating circuit applies to room heating The adjustable maximum hot water temperature applies to hot water generation * In the case of bivalent-renewable systems, the heat pump is not blocked; the heat pump receives priority 1 in this state

*NOTE
The maximum hot water temperature can be limited by the stored "maximum possible hot water temperature"!

7.1.2 Implementation on the heat pump manager

	Address	Datapoint type	IN / OUT	Conversion Rule	Conversion Value	DPT	R / W	Unit
Surname	WPM software L	Datapoint type	IN / OUT	Conversion Rule	Conversion Value	DPT	R / W	Unit
Operating status "green"	3	Boolean	IN / OUT	None		1,001	R / W	no
Operating status "red"	4	Boolean	IN / OUT	None		1,001	R / W	no

NOTE
From WPM software L20.2 it is possible to write to this data point in order to be able to trigger a corresponding action via the interface!

8 Contact

For further questions, information and suggestions, please send an email to:

ferndiagnose@gdts.one

with the additional information of:

Device designation
Software version