a. EN enable: only one read/write function (i.e. MBUS_MSG) can be enabled at the same moment.

b. First read/write request bit: each new read/write request must be triggered with a pulse

c. Slave address: selectable range 1 - 247 (modbus address of the instrument)

d. RW Slave address: 0 = Read, 1 = Write

e. Addr read/write slave Select the data type to be read/written.

Data addresses:

00001 to 0xxxx - switching outputs

10001 to 1xxxx - switching inputs

30001 to 3xxxx - analog inputs

40001 to 4xxxx - holding registers

f. Count number of data Number of data for communication

f. The maximum amount of data that can be read/written by the Modbus master is 120 words (for each MBUS_MSG instruction)

g. DataPtr Data Pointer: 1. If it is a read instruction, the data read back will be put into this data area

Note: Each parameter applies to the data registers, which can be modified to provide multiple slaves with the same data. modification and can be provided to multiple slave calls.