Kohler Decision Maker 340, 3500 MODBUS registers: read online

Connect Kohler to the computer through a USB-to-serial or RS485 adapter and read its registers in your browser: click "Read register values online" under the model (Chrome or Edge, nothing to install). The tables below list the MODBUS offset, unit, data type and scale of every register shown. For logging 24/7 into a database, CSV files or Excel, use the Advanced Serial Data Logger (for MODBUS RTU) or Advanced TCP/IP Data Logger (for MODBUS TCP): they poll the complete map of every model on this page and provide continuous Kohler modbus logging and log.

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Kohler (Decision Maker 340) - MODBUS Maps

Connection and addressing notes

Protocol: Modbus
Register addressing: 4xxxx Modbus addresses starting at 40001
Map offsets: register number minus 40001
Data types: WORD
Text values: consecutive WORD registers, one character per byte
Text byte order: first character in the LSB

Registers in the map: 119 (the first 50 are listed below; the browser reader and the data loggers use the complete map). function 3 (holding registers). byte order big-endian. data types: string(16), string(20), string(26), string(6), string(9), word.

MODBUS offset	Description	Units	Data type	Scale
164	Model no		string(26)
139	Designation		string(9)
144	Load description		string(20)
154	Location		string(20)
177	Spec. No		string(16)
185	Serial no		string(6)
188	Controller serial no		string(6)
1	System time		word
2	Day of week		word
3	Month		word
4	Day		word
5	Year		word
6	Week of month		word
7	Voltage l1l2	V	word
8	Voltage l2l3	V	word
9	Voltage l3l1	V	word
10	Frequency	Hz	word
11	Voltage l1l0	V	word
12	Voltage l2l0	V	word
13	Voltage l3l0	V	word
14	Alert code	AeRGode	word
15	Engine speed		word
16	Coolant temp		word
17	Oil pressure		word
18	Battery voltage	V DC	word	×0.1
19	L1 current	A	word
20	L2 current	A	word
21	L3 current	A	word
22	Power factor		word	×0.01
23	Total real power	kW	word
24	Percent of max. Power	%	word	×0.01
33	Status		word
47	Engine start time	s	word
48	Crank time	s	word
49	Crank pause time	s	word
50	Num of crank cycles		word
51	Engine cooldown time	s	word
52	Over voltage time delay	s	word
53	Under voltage time delay	s	word
54	Starting aid time	s	word
55	Aux 1 inhibit time	s	word
56	Aux 1 delay time	s	word
57	Aux 2 inhibit time	s	word
58	Aux 2 delay time	s	word
59	Aux 3 inhibit time	s	word
60	Aux 3 delay time	s	word
61	Aux 4 inhibit time	s	word
62	Aux 4 delay time	s	word
63	Over voltage trip point	%	word
64	Under voltage trip point	%	word

This is not the complete map: 50 of 119 registers are listed above. Click "Read register values online" to read any register of your device in the browser, or download the program to log the complete map.

Kohler (Decision Maker 3500) - MODBUS Registers Map

Connection and addressing notes

Protocol: Modbus
Register addressing: 400xxx Modbus addresses starting at 400001
Map offsets: register number minus 400001
Data types: UINT/WORD 16 bit

Registers in the map: 118 (the first 50 are listed below; the browser reader and the data loggers use the complete map). function 3 (holding registers). byte order big-endian. data types: smallint, word.

MODBUS offset	Description	Units	Data type	Scale
0	Rms generator voltage L1 L2	%	word	×0.01
1	Rms generator voltage L2 L3	%	word	×0.01
2	Rms generator voltage L3 L1	%	word	×0.01
3	Rms generator voltage line to line average	%	word	×0.01
4	Rms generator voltage L1 N	%	word	×0.01
5	Rms generator voltage L2 N	%	word	×0.01
6	Rms generator voltage L3 N	%	word	×0.01
7	Rms generator voltage line to neutral average	%	word	×0.01
8	Rms generator current L1	%	word	×0.01
9	Rms generator current L2	%	word	×0.01
10	Rms generator current L3	%	word	×0.01
11	Rms generator current average	%	word	×0.01
12	Generator frequency		word	×0.01
13	Generator real power L1	%	smallint	×0.01
14	Generator real power L2	%	smallint	×0.01
15	Generator real power L3	%	smallint	×0.01
16	Generator total real power	%	smallint	×0.01
17	Generator reactive power L1	%	smallint	×0.01
18	Generator reactive power L2	%	smallint	×0.01
19	Generator reactive power L3	%	smallint	×0.01
20	Generator reactive power	%	smallint	×0.01
21	Generator apparent power L1	%	word	×0.01
22	Generator apparent power L2	%	word	×0.01
23	Generator apparent power L3	%	word	×0.01
24	Generator apparent power	%	word	×0.01
25	Generator power factor L1	pF	smallint	×0.01
26	Generator power factor L2	pF	smallint	×0.01
27	Generator power factor L3	pF	smallint	×0.01
28	Generator power factor	pF	smallint	×0.01
29	Generator phase angle voltage L1 voltage L2	deg	smallint	×0.1
30	Generator phase angle voltage L1 voltage L3	deg	smallint	×0.1
31	Generator phase angle voltage L1 current L1	deg	smallint	×0.1
32	Generator phase angle voltage L2 current L2	deg	smallint	×0.1
33	Generator phase angle voltage L3 current L3	deg	smallint	×0.1
43	Rms bus voltage L1 L2	%	word	×0.01
44	Rms bus voltage L2 L3	%	word	×0.01
45	Rms bus voltage L3 L1	%	word	×0.01
46	Rms bus voltage average line to line	%	word	×0.01
47	Total bus real power	%	smallint	×0.01
48	Total bus reactive power	%	smallint	×0.01
49	Bus frequency		word	×0.01
51	Phase angle generator voltage L1 bus voltage L1	deg	smallint	×0.1
52	Speed bias	%	smallint	×0.01
53	Voltage bias	%	smallint	×0.01
110	Engine run speed	RPM	word
512	Total number of starts		word
513	Total runtime hours since maintenance lw	h	word	×0.1
515	Total loaded hours since maintenance lw	h	word	×0.1
517	Total kw hours since maintenance lw	kWh	word
519	Last maintenance day, month	Day of Month, Month of Year	word

This is not the complete map: 50 of 118 registers are listed above. Click "Read register values online" to read any register of your device in the browser, or download the program to log the complete map.

Kohler (Decision Maker 550) - MODBUS Maps

Connection and addressing notes

Protocol: Modbus
Register addressing: 4xxxx Modbus addresses starting at 40001
Map offsets: register number minus 40001
Data types: WORD
Text values: model number and code version occupy several consecutive registers

Registers in the map: 107 (the first 50 are listed below; the browser reader and the data loggers use the complete map). function 3 (holding registers). byte order big-endian. data types: integer, smallint, string, word.

MODBUS offset	Description	Units	Data type	Scale
151	Model No.		string
204	Code Version		string
0	L1 L2 voltage	V AC	word
1	L2 L3 voltage	V AC	word
2	L3 L1 voltage	V AC	word
3	L1 l0 voltage	V AC	word
4	L2 l0 voltage	V AC	word
5	L3 l0 voltage	V AC	word
6	L1 current	A AC	word
7	L2 current	A AC	word
8	L3 current	A AC	word
9	Frequency	Hz	word	×0.01
10	Total	kW	word
11	Percent of rated kw	% Rated kW	word
12	Total power factor		smallint	×0.01
13	L1	kW	word
14	L1 power factor		smallint	×0.01
15	L2	kW	word
16	L2 power factor		smallint	×0.01
17	L3	kW	word
18	L3 power factor		smallint	×0.01
19	Total	kvar	smallint
20	L1	kvar	smallint
21	L2	kvar	smallint
22	L3	kvar	smallint
23	Total	kVA	word
24	L1	kVA	word
25	L2	kVA	word
26	L3	kVA	word
27	Current lead/lag		word
32	Oil pressure	kPa/psi	word
33	Coolant temperature	Degrees C/Degrees F	smallint
34	Engine speed	RPM	word
35	Local battery voltage		word	×0.1
36	Fuel pressure	kPa/psi DDEC/MDEC/ADEC only	word
37	Fuel temperature	Degrees C/Degrees F DDEC/MDEC/ADEC only	smallint
38	Fuel rate	Liters/Hour X 100 or Gallons/Hour	word	×0.01
39	Used last run	Liters/Gallons DDEC only	word
40	Coolant pressure	kPa/psi DDEC only	word
41	Coolant level	%	word	×0.1
42	Lube oil temperature	deg C	smallint
43	Oil level	%	word	×0.1
44	Crankcase pressure	kPa/psi DDEC only	word
45	Ambient temperature	Degrees C/Degrees F DDEC only	smallint
46	Ecm battery voltage	V DC	word	×0.1
47	Ecm status		word
48	Intake air temperature	deg C	smallint
49	Intake air pressure	Degrees C/Degrees F MDEC/ADEC only	word
50	Mdec/adec fault codes	Numeric Fault Code MDEC/ADEC only	word
60	Analog input 00 (battery voltage)	V DC	word

This is not the complete map: 50 of 107 registers are listed above. Click "Read register values online" to read any register of your device in the browser, or download the program to log the complete map.

Kohler (Decision Maker 6000) - MODBUS Registers Map

Connection and addressing notes

Protocol: Modbus
Register addressing: 4xxxx Modbus addresses starting at 40001
Map offsets: register number minus 40001
Data types: WORD
Text values: model number occupies several consecutive registers

Registers in the map: 104 (the first 50 are listed below; the browser reader and the data loggers use the complete map). function 3 (holding registers). byte order big-endian. data types: integer, smallint, string, word.

MODBUS offset	Description	Units	Data type	Scale
151	Model No.		string
0	L1 L2 voltage	V AC	word
1	L2 L3 voltage	V AC	word
2	L3 L1 voltage	V AC	word
3	L1 l0 voltage	V AC	word
4	L2 l0 voltage	V AC	word
5	L3 l0 voltage	V AC	word
6	L1 current	A AC	word
7	L2 current	A AC	word
8	L3 current	A AC	word
9	Frequency	Hz	word	×0.01
10	Total	kW	word
11	Percent of rated kw	% Rated kW	word
12	Total power factor	PF	smallint	×0.01
13	L1	kW	word
14	L1 power factor	PF	smallint	×0.01
15	L2	kW	word
16	L2 power factor	PF	smallint	×0.01
17	L3	kW	word
18	L3 power factor	PF	smallint	×0.01
19	Total	kvar	smallint
20	L1	kvar	smallint
21	L2	kvar	smallint
22	L3	kvar	smallint
23	Total	kVA	word
24	L1	kVA	word
25	L2	kVA	word
26	L3	kVA	word
27	Current lead/lag		word
32	Oil pressure	kPa/psi	word
33	Coolant temperature	Degrees C/Degrees F	smallint
34	Engine speed	RPM	word
35	Local battery voltage	V DC	word	×0.1
36	Fuel pressure	kPa/psi DDEC/MDEC/ADEC only	word
37	Fuel temperature	Degrees C/Degrees F DDEC/MDEC/ADEC only	smallint
38	Fuel rate	Liters/Hour	word	×0.01
39	Used last run	Liters/Gallons DDEC only	word
40	Coolant pressure	kPa/psi DDEC only	word
41	Coolant level	%	word	×0.1
42	Lube oil temperature	Degrees C/Degrees F DDEC/MDEC/ADEC only	smallint
43	Oil level	%	word	×0.1
44	Crankcase pressure	kPa/psi DDEC only	word
45	Ambient temperature	Degrees C/Degrees F DDEC only	smallint
46	Ecm battery voltage	V DC	word	×0.1
47	Ecm status		word
48	Intake air temperature	Degrees C/Degrees F MDEC/ADEC only	smallint
49	Intake air pressure	Degrees C/Degrees F MDEC/ADEC only	word
50	Mdec/adec fault codes	Numeric Fault Code MDEC/ADEC only	word
60	Analog input 00 (battery voltage)	V DC	word
61	Analog input01	User-defined and calibrated through the 6000 controller. See the controller operation manual.	word

This is not the complete map: 50 of 104 registers are listed above. Click "Read register values online" to read any register of your device in the browser, or download the program to log the complete map.

Kohler (M340) - MODBUS Registers

Connection and addressing notes

Protocol: Modbus
Register addressing: 4xxxx Modbus addresses starting at 40001
Map offsets: register number minus 40001
Data types: WORD
Text values: occupy several consecutive registers

Registers in the map: 131 (the first 50 are listed below; the browser reader and the data loggers use the complete map). function 3 (holding registers). byte order big-endian. data types: word.

MODBUS offset	Description	Data type
1	System time	word
2	Day of week	word
3	Month	word
4	Day	word
5	Year	word
6	Week of month	word
7	Time not in normal since reset	word
14	Time not in normal	word
15	Time in emergency	word
16	Days of operation	word
17	Transfers	word
18	Month in operation	word
19	Day in operation	word
20	Year in operation	word
21	Voltage A B normal	word
22	Voltage B C normal	word
23	Voltage ca normal	word
24	Freq. Ac normal	word
25	Voltage A B emerg	word
26	Voltage B C emerg	word
27	Voltage ca emerg	word
28	Freq. Ac emerg	word
29	Exerciser time remaining	word
30	Month of last exercise	word
31	Day of last exercise	word
32	Year of last exercise	word
33	Time of last outage	word
34	Month of last outage	word
35	Day of last outage	word
36	Year of last outage	word
37	Duration of last outage	word
38	History event #1 code	word
39	History event #2 code	word
40	History event #2 month	word
41	History event #2 day	word
42	History event #2 year	word
43	History event #3 code	word
44	History event #3 month	word
45	History event #3 day	word
46	History event #3 year	word
47	History event #4 code	word
48	History event #4 month	word
49	History event #4 day	word
50	History event #4 year	word
51	Alert code	word
77	Off to emergency time delay	word
78	Off to normal time delay	word
79	Engine start time delay	word
80	Normal to emerg. Time delay	word
81	Emerg. To normal time delay	word

This is not the complete map: 50 of 131 registers are listed above. Click "Read register values online" to read any register of your device in the browser, or download the program to log the complete map.

Related MODBUS registers maps

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Kohler Decision Maker 340, 3500 MODBUS registers: read online

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