IR-310-RM,
IR Controlled 10-ch High Power Relay Module
(Ver. 1.1, Jul/02/2013) 29
5. Modbus Commands for IR-310-RM
The following Function Code commands are provided for a Modbus master to control
and configure IR-310-RM.
It is necessary to append 2 bytes of CRC16 to the tail of
each Modbus command.
FC01, 05, and 15 are the standard Modbus commands for Modbus masters to access
the relay outputs of IR-310-RM. Sub-FC commands of FC100 are specific to the
settings and control on IR-310-RM.
Table 5-1: Modbus Function Calls for IR-310-RM
Function Code
Description
Section
01 (0x01)
Read coils (relay output states)
5.1
05 (0x05)
Write single coil (single relay output)
5.2
15 (0x0F)
Write multiple coils (multiple relay outputs)
5.3
100 (0x64)
Commands for the settings of the IR-310-RM. 5.4
Figure 5-1
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