Yaskawa CR700 Modbus register map

AC drive for cranes, 200 V and 400 V class, MEMOBUS/Modbus RTU on the built-in RS-485 port

Official
181 registers
Modbus RTU
Revision 1 · 2026-10-24
Identity: firmware

Official: Written from the manufacturer's documentation, but not tested on a device yet. Check the map against the manufacturer's documentation before you write to a live device. Tested it? Report a test.

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Communication

Protocol: Modbus RTU
Unit ID: 31
Serial: 9600 8N1 · 9600 baud, 8 data bits, none parity, 1 stop bit
Byte / word order: ABCD · bytes big-endian, words high first default
Addresses: 0-based
Max read: 16 registers per request

Connection values are defaults: the device may be configured differently.

Map

Registers: 181 holding registers
Groups: 8
Translation tables: 2
Revision: 1 · 2026-10-24
Added: 2026-10-24 (2026-10-24)
File: maps/yaskawa/cr700.mbmap.json · 32 KB · history
SHA-256: 1118203ce4d1fc5e73c1a28f11a41347a39fee26c32134dcfc0c0022bc331e40
Manufacturer: yaskawa.eu.com

Device identity

What a tool can read to check that this map fits the connected device (SPEC.md section 4.7). Registers with a role are read like any other register.

Registers
Role	Register	Address	Type	Values
Firmware	Flash software number (U1-25)	holding 77	uint16

Sources and notes

YASKAWA AC Drive CR700 for Cranes Technical Manual · version SIEPC71061723B
section 5.3 (tables 5.12 to 5.17) and the parameter list (b1, C1, d1, E1, E2, H5, o1, U1-U4); checked against the map attached to issue #70

Source: YASKAWA AC Drive CR700 for Cranes Technical Manual, SIEPC71061723B, section 5.3 and chapter 10

MEMOBUS/Modbus RTU: 8 data bits and 1 stop bit (fixed). Factory defaults are node address 0x1F (31), 9600 bps (H5-02 = 3) and no parity (H5-03 = 0); after changing them, power cycle or set H5-20 = 1.
Function 03 reads at most 16 registers per message; 06/10 write. Command data (0x0001-0x000F) and monitor data (0x0020-0x00FB) need no Enter command.
To run from Modbus set b1-01 = 2 and b1-02 = 2. With H5-11 = 0 (default) a parameter write takes effect only after the Enter command: write 0 to 0x0900 (saved to EEPROM) or 0x0910 (RAM only).
Frequency registers are scaled for o1-03 = 0 (0.01 Hz). Some current and power registers change resolution with the drive model; their scale is left at 1.
Only the main parameters are listed. Every parameter has its MEMOBUS address in the manual's parameter list (chapter 10): read it with function 03 and write it as above.
Do not use Modbus writes as a safety function on a crane: brake control, limits and emergency stop must stay in the drive's hardware and safety settings.
Written from the manufacturer's manual; not tested on a device.

Area	Address	Type	Access	Unit	Scale	Description
HR	1	bool bit 0	RW
HR	1	bool bit 1	RW
HR	1	bool bit 2	RW
HR	1	bool bit 3	RW
HR	1	bool bit 4	RW
HR	1	bool bit 5	RW
HR	1	bool bit 6	RW
HR	1	bool bit 7	RW
HR	1	bool bit 8	RW
HR	1	bool bit 9	RW
HR	1	bool bit 10	RW
HR	1	bool bit 11	RW
HR	1	bool bit 12	RW
HR	1	bool bit 13	RW
HR	2	uint16	RW	Hz	×0.01	Units set by o1-03; 0.01 Hz with o1-03 = 0
HR	3	uint16	RW	%	×0.1	100.0% at power up
HR	4	int16	RW	%	×0.1	Used when enabled in register 0x000F bit 2
HR	5	int16	RW	%	×0.1	Used when enabled in register 0x000F bit 3
HR	7	uint16	RW			Terminal FM/AM value when set for communications; 0x4000 = 10 V
HR	8	uint16	RW			0x4000 = 10 V
HR	9	bool bit 0	RW
HR	9	bool bit 1	RW
HR	9	bool bit 2	RW
HR	9	bool bit 6	RW
HR	9	bool bit 7	RW
HR	15	bool bit 2	RW
HR	15	bool bit 3	RW
HR	15	bool bit 12	RW
HR	15	bool bit 13	RW
HR	15	bool bit 14	RW
HR	15	bool bit 15	RW
HR	2304	uint16	W			Write 0 to save written parameters to EEPROM and apply them (limited to 100,000 writes)
HR	2320	uint16	W			Write 0 to apply written parameters without saving them
HR	32	bool bit 0	R
HR	32	bool bit 1	R
HR	32	bool bit 2	R
HR	32	bool bit 3	R
HR	32	bool bit 4	R
HR	32	bool bit 5	R
HR	32	bool bit 6	R
HR	32	bool bit 7	R
HR	32	bool bit 14	R
HR	32	bool bit 15	R
HR	33	bool bit 0	R
HR	33	bool bit 1	R
HR	33	bool bit 2	R
HR	33	bool bit 3	R
HR	33	bool bit 4	R
HR	33	bool bit 7	R
HR	33	bool bit 8	R
HR	33	bool bit 9	R
HR	33	bool bit 10	R
HR	33	bool bit 11	R
HR	33	bool bit 12	R
HR	33	bool bit 13	R
HR	33	bool bit 14	R
HR	33	bool bit 15	R
HR	34	bool bit 0	R
HR	34	bool bit 3	R
HR	34	bool bit 4	R
HR	34	bool bit 5	R
HR	35	uint16	R	Hz	×0.01	Units set by o1-03
HR	36	uint16	R	Hz	×0.01	Units set by o1-03
HR	37	uint16	R	V	×0.1	1 V units when H5-10 = 1
HR	38	uint16	R	A	×0.1
HR	39	int16	R	kW		0.01 kW below 11 kW, 0.1 kW above; scale not applied
HR	41	bool bit 1	R
HR	41	bool bit 2	R
HR	41	bool bit 3	R
HR	41	bool bit 4	R
HR	41	bool bit 6	R
HR	42	bool bit 2	R
HR	42	bool bit 3	R
HR	42	bool bit 4	R
HR	42	bool bit 5	R
HR	42	bool bit 6	R
HR	42	bool bit 7	R
HR	42	bool bit 8	R
HR	42	bool bit 9	R
HR	42	bool bit 10	R
HR	42	bool bit 12	R
HR	42	bool bit 15	R
HR	43	bool bit 0	R
HR	43	bool bit 1	R
HR	43	bool bit 2	R
HR	43	bool bit 3	R
HR	43	bool bit 4	R
HR	43	bool bit 5	R
HR	43	bool bit 6	R
HR	43	bool bit 7	R
HR	43	bool bit 8	R
HR	43	bool bit 9	R
HR	44	bool bit 0	R
HR	44	bool bit 1	R
HR	44	bool bit 2	R
HR	44	bool bit 3	R
HR	44	bool bit 4	R
HR	44	bool bit 5	R
HR	44	bool bit 6	R
HR	44	bool bit 7	R

Help improve this map

I tested it on a deviceReport whether it worked, even if you did not write the map.
Suggest a correctionEdit the file on GitHub; it opens a pull request.
Report a problemA wrong address, type, scale or byte order.
Read the formatWhat each key of the file means (SPEC.md).