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5. Modbus Module Operation
5.1. Modbus Commands
When a MODBUS command is used, the Modbus module translates it to the
corresponding T2 register access protocol.
MODBUS FUNCTION CODE
T2 COMMAND
01 Read Coil Status
DR Read Device/Register
02 Read Input Status
DR Read Device/Register
03 Read Holding Register
DR Read Device/Register
04 Read Input Register
DR Read Device/register
05 Force Single Coil
DW Write Device Register
06 Force Single Register
DW Write Device/Register
08 Loop Back Diagnostic test
**** Not Supported by EX10-MML11
15 Force Multiple Coils
DW Write Device/register
16 Preset Multiple Registers
DW Write Device/register
For more information on the Modbus protocol, please refer to the Modbus Protocol Reference
Guide, see Additional References.
For more information on the T2 register access protocol, please refer to the Computer Link
Function Operation Manual, see Additional References.