M-system R1M-GH2T Series, Manual

Page: 5 / 9

MODEL: R1M-GH
R1M-GH SPECIFICATIONS ES-5657 Rev.11 Page 5/9
MODBUS COMMUNICATION
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COMMUNICATION PARAMETERS
PARAMETER SPECIFICATION
Data Mode RTU
Baud Rate 9600 / 19200 / 38400 (*) bps
Parity None / Odd (*) / Even
Bit Length 8
Stop Bit 1 (*) / 2
Node Address 1 (*) to 15
Floating Point Data N/A
Interface RS-232-C/ RS-485
(*) Ex-factory setting
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FUNCTION CODES & SUPPORTED CODES
CODE NAME
01 Read Coil Status X Digital output from the slave
02 Read Input Status X Status of digital inputs to the slave
03 Read Holding Registers X General purpose register within the slave
04 Read Input Registers X Collected data from the field by the slave
05 Force Single Coil X Digital output from the slave
06 Preset Single Registers X General purpose register within the slave
07 Read Exception Status
08 Diagnostics
09 Program 484
10 Poll 484
11 Fetch Comm. Event Counter Fetch a status word and an event counter
12 Fetch Comm. Event Log A status word, an event counter, a message count and a field of event bytes
13 Program Controller
14 Poll Controller
15 Force Multiple Coils X Digital output from the slave
16 Preset Multiple Registers X General purpose register within the slave
17 Report Slave ID Slave type / ‘RUN’ status
18 Program 884/M84
19 Reset Comm. Link
20 Read General Reference
21 Write General Reference
22 Mask Write 4X Register
23 Read/Write 4X Register
24 Read FIFO Queue