WB-MAP3E configuration registers

Description

Legend
RO / RW	Read only / Read/Write
Shown in bold	Default register value
xN	Multiply the register value by this factor to obtain the value in the stated units. If omitted, assume 1
⚡	This register supports data transmission using events in Fast Modbus.
FW	Firmware version that introduced the register. Blank means it has always been available.
Error:	Value on error
Grey cell	Service register: purpose, format and contents may change in later firmware

Configuration registers
Address		Register parameters			Description	Values	FW
Dec	Hex	Type	Access	Format	Description	Values	FW
102	0x0066	Holding	RW	u8	Detect phase outages ERRMAP0003	0 - disabled, 1 - enabled	2.6.3
4336	0x10F0	Holding	RW	u16	Peak aggregation period (s)	1 - 65535 60	2.3.0
4340	0x10F4	Holding	RW	u16	Current peak detection period (ms)	1 - 255 20	2.13.0
5216	0x1460	Holding	RW	u16	L1 (A) current transformer ratio	0 for WB-MAP3E, 2000 for WB-MAP3ET	2.1.0
5217	0x1461	Holding	RW	u16	L2 (B) current transformer ratio	0 for WB-MAP3E, 2000 for WB-MAP3ET	2.1.0
5218	0x1462	Holding	RW	u16	L3 (C) current transformer ratio	0 for WB-MAP3E, 2000 for WB-MAP3ET	2.1.0
5219	0x1463	Holding	RW	s16	L1 (A) current transformer phase delay	x0.001, ° -32768 - 32767 (0 for WB-MAP3E, 120 for WB-MAP3ET)	2.1.0
5220	0x1464	Holding	RW	s16	L2 (B) current transformer phase delay	x0.001, ° -32768 - 32767 (0 for WB-MAP3E, 120 for WB-MAP3ET)	2.1.0
5221	0x1465	Holding	RW	s16	L3 (C) current transformer phase delay	x0.001, ° -32768 - 32767 (0 for WB-MAP3E, 120 for WB-MAP3ET)	2.1.0
5280	0x14A0	Holding	RW	u16	Phase of the current transformer connected to CT1 1 - L1(A), 2 - L2(B), 3 - L3(C)	1	2.3.2
5281	0x14A1	Holding	RW	u16	Phase of the current transformer connected to CT2 1 - L1(A), 2 - L2(B), 3 - L3(C)	2	2.3.2
5282	0x14A2	Holding	RW	u16	Phase of the current transformer connected to CT3 1 - L1(A), 2 - L2(B), 3 - L3(C)	3	2.3.2
5296	0x14B0	Holding	RW	bool	Invert the L1 (A) current transformer	0 - no, 1 - yes	2.10.0
5297	0x14B1	Holding	RW	bool	Invert the L2 (B) current transformer	0 - no, 1 - yes	2.10.0
5298	0x14B2	Holding	RW	bool	Invert the L3 (C) current transformer	0 - no, 1 - yes	2.10.0

Legend
RO / RW	Read only / Read/Write
Shown in bold	Default register value
xN	Multiply the register value by this factor to obtain the value in the stated units. If omitted, assume 1
⚡	This register supports data transmission using events in Fast Modbus.
FW	Firmware version that introduced the register. Blank means it has always been available.
Error:	Value on error
Grey cell	Service register: purpose, format and contents may change in later firmware

Connection settings, firmware version and other service registers
Address		Register parameters			Description	Values	Note
Dec	Hex	Type	Access	Format	Description	Values	Note
Connection settings
110	0x006E	Holding	RW	u16	RS-485 baud rate. RS-485 connection parameter settings	×100, baud 12 — 1200 bit/s, 24 — 2400 bit/s, 48 — 4800 bit/s, 96 — 9600 bit/s, 192 — 19200 bit/s, 384 — 38400 bit/s, 576 — 57600 bit/s, 1152 — 115200 bit/s
111	0x006F	Holding	RW	u16	RS-485 parity setting	0 — no parity (none), 1 — odd, 2 — even
112	0x0070	Holding	RW	u16	RS-485 stop bits See: stop-bit tolerance	1, 2
128	0x0080	Holding	RW	u16	Device Modbus address (details)
Device model and firmware version
200-205	0x00C8 - 0x00CD	Input	RO	string	Device model
206-219	0x00CE - 0x00DB	Input	RO	string	Device model extension.	Read 20 registers (200–219) to obtain the device model	Only in firmware supporting Fast Modbus
220-244	0x00DC - 0x00F4	Input	RO	string	Firmware build commit hash and branch name (2 characters per register)
250-265	0x00FA - 0x0109	Input	RO	string	Firmware version
266-269	0x010A - 0x010D	Input	RO	u64	Serial number extension
270-271	0x010E - 0x010F	Input	RO	u32	Serial number	Subtract from the received value: 0xFE000000. After reading 0xFF001F9C, subtract 0xFE000000 to obtain the serial number 0x01001F9C = 16785308₁₀
290-301	0x0122 - 0x012D	Input	RO	string	Firmware signature
320	0x0140	Input	RO	u16	Firmware version in numeric format (details)	MAJOR	Only in firmware supporting Fast Modbus
321	0x0141					MINOR
322	0x0142					PATCH
323	0x0143			s16		SUFFIX
324-325	0x0144 - 0x0145	Input	RO	u32	Firmware version in numeric format		Only in firmware supporting Fast Modbus
326-327	0x0146 - 0x0147	Input	RO	u32	Firmware version in big-endian format		Only in firmware supporting Fast Modbus
Other information
104-105	0x0068 - 0x0069	Input	RO	u32	Uptime since boot	seconds
120	0x0078	Holding	RW	u16	Reboot device without saving state	Any non-zero value reboots the device
129	0x0081	Holding	RW	u16	Enter firmware update mode for 2 minutes	Any non-zero value enters firmware update mode
330-337	0x014A - 0x0151	Input	RO	string	Bootloader version
130	0x0082	Holding	RW	u16	Disable Status LED	0 — enabled 1 — disabled
131	0x0083	Holding	RW	u16	Enter firmware update mode using the current communication settings. To check whether the firmware and bootloader support this feature, read this register. If reading succeeds and returns `0`, the feature is supported.	Writing 1 enters firmware update mode
113	0x0071	Holding	RW	u16	Delay before replying to a Modbus request	ms 0…254 (0)	Only in firmware supporting Fast Modbus
114	0x0072	Holding	RW	u16	Continuous reading across register gaps	0 — disabled 1 — enabled 2 — enabled persistently across reboots	Only in firmware supporting Fast Modbus
121	0x0079	Input	RO	u16	Current internal 5 V rail voltage	mV
122	0x007A	Input	RO	u16	Minimum internal 5 V rail voltage since boot, without averaging	mV
125	0x007D	Input	RO	u16	Current internal 5 V rail voltage, without averaging	mV
119	0x0077	Input	RO	u16	Minimum microcontroller supply voltage since boot, before averaging	mV
123	0x007B	Input	RO	u16	Microcontroller supply voltage	mV
124	0x007C	Input	RO	s16	Internal microcontroller temperature	x0.1, °C
304-319	0x0130-0x013F	Input	RO	string	Device batch number. Available only on devices manufactured from 21 January 2026.		Since firmware 2.12.0
64256-64383	0xFB00-0xFB7F	Input	RO	u16	FlashFS: free space per page	bytes
64384-64511	0xFB80-0xFBFF	Input	RO	u16	FlashFS: total size of current files per page	bytes
64512-64639	0xFC00-0xFC7F	Input	RO	u16	FlashFS: page fragmentation	0…100 % 0 — all data is current, 100 — no current data
64640-64767	0xFC80-0xFCFF	Input	RO	u16	FlashFS: page erase counter
65402	0xFF7A	Holding	RW	u16	Reset device settings to defaults. Communication settings are retained. The device reboots after the reset.	Writing 1 resets the settings
65500	0xFFDC	Coil	RW	bool	Service register for visually testing indicator LEDs	Writing 1 switches on all indicator LEDs
65504	0xFFE0	Input	RO	u16	Maximum stack usage	bytes 0 — stack corrupted
65505	0xFFE1	Input	RO	u16	Free RAM	bytes
65506	0xFFE2	Input	RO	u16	Used RAM	bytes
65507	0xFFE3	Input	RO	u16	Stack size	bytes
65508	0xFFE4	Input	RO	u16	Cause of last MCU reset	1 — LPWR, 2 — WWDG, 3 — IWDG, 4 — SFT, 5 — POR, 6 — PIN, 7 — OBL, 8 — V18PWR
65509	0xFFE5	Input	RO	u32	Firmware update counter