Rievtech ELC Series - Page 168

EN
Programmable Relay ● User Manual for ELC, EXM and PR Series 168 2020 v6.0 ● © Rievtech Co.,
Ltd. ● www.rievtech.com
The properties of “Modbus Read” block are shown
below:
1. Slave Address: 1 is the default
2. Communication parameters：BPS is baud rate, Stop bits,
Data bits
Communication type: RS232 or RS485 interface of xLogic
CPU.
3. Command, register address, and register count
4. Where to save the data read from the Slave.
Command
Function description
Remark
01
Read one group coil status
(00000～0XXXX)
Read Coil Status
(output)
02
Fetch one group data of the
status of switch input (10000～
1XXXX)
Read input Status
(input relay)
03
Read data of multi-holding
register (40000～4XXXX)
Read Holding
Registers (Output
register)
04
Read data of input registers
(3000～3XXXX)
Read Input
Registers
NOTICE:
Please use “03” command to read AI/AO of
xLogic.
Example: The following shows one xLogic (Master)
communicating with three xLogic (Slave) via RS485.
Example 1: Get the Q1 status of SLAVE1(xLogic) and then
save the bit status to F1.