Name

Type

Initial

MODBUS_READ_COILS_CODE

INT

1

MODBUS_READ_DISCRETE_INPUTS_CODE

INT

2

MODBUS_READ_HOLDING_REGISTERS_CODE

INT

3

MODBUS_READ_INPUT_REGISTERS_CODE

INT

4

MODBUS_WRITE_SINGLE_COIL_CODE

INT

5

MODBUS_WRITE_SINGLE_REGISTER_CODE

INT

6

MODBUS_WRITE_MULTIPLE_COIL_CODE

INT

15

MODBUS_WRITE_MULTIPLE_REGISTERS_CODE

INT

16

MODBUS_READ_WRITE_MULTIPLE_REGISTERS_CODE

INT

23