Data Sheet

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Table Of Contents

GNM3D and GNM3T Series Communication Protocol

13

308196

2003h

1

RS485 Stop bit

UINT 16

Value 0 = 1 stop bit

Value 1= 1 (default)

Value 2 =2 (only if parity is even)

Any other value = 1 stop bit

308197

2004h

1

Max number of words readable

with a single Modbus request

UINT 16

Value = 50 (words)

Note: The number of stop bits is fixed to “1” if parity is EVEN.

2.

7.8 Reset commands

MODBUS: read and write mode Table 2.8-8

Modicom

address

Physical

address

Length

(words)

VARIABLE

ENG. UNIT

Data

Format

Notes

316385

4000h

1

Reset of all partial and tariff

meters, kWdmd and kWdmdm

peak

UINT 16

Value=0: reset done

Value=1: execute the command

All other values produce no effects

316386

4001h

1

Reset of total energy meters (only

for non-MID versions)

UINT 16

Value=0: reset done

Value=1: execute the command

All other values produce no effects

2.

7.9 Serial number

MODBUS: read only mode Table 2.8-9

Modicom

address

Physical

address

Length

(words)

VARIABLE

ENG. UNIT

Data

Format

Notes

320481

5000h

1

Letter 1 (from SX)

Letter 2 (from SX)

MSB: ASCII code

LSB: ASCII code

320482

5001h

1

Letter 3 (from SX)

Letter 4 (from SX)

MSB: ASCII code

LSB: ASCII code

320483

5002h

1

Letter 5 (from SX)

Letter 6 (from SX)

MSB: ASCII code

LSB: ASCII code

320484

5003h

1

Letter 7 (from SX)

Letter 8 (from SX)

MSB: ASCII code

LSB: ASCII code

320485

5004h

1

Letter 9 (from SX)

Letter 10 (from SX)

MSB: ASCII code

LSB: ASCII code

320486

5005h

1

Letter 11 (from SX)

Letter 12 (from SX)

MSB: ASCII code

LSB: ASCII code

320487

5006h

1

Letter 13 (from SX)

MSB: ASCII code

2.

7.10 Note

The default value shall be automatically assigned to the parameters when an out-of-range or invalid

value is written.