Programmable Relay ● User Manual for ELC, EXM and PR Series 215 2020 v6.0 ● © Rievtech Co.,
Ltd. ● www.rievtech.com
Free Protocol Communication
Description of function
This special function block enables the use of a user
defined communication protocol to communicate with
multiple smart devices. The block can be used to either
Transmit Only or Transmit and Receive.
When the input to pin EN is High
the block is enabled.
Comm Type:
COM 0 (RS232/PRO-RS485)
COM 1 (Expansion RS485)
COM 2 (Built-in RS485)
Ethernet: Sockets 1 to 8
For Serial COM Ports Settings are:
Bit per Second: 1200 to 19200
Data Bits: 5 to 8
Stop Bits: 1 to 2
Parity: None, Odd, Even, Mark or
Space
For Ethernet, CPU is Client or
Server
CPU as Client – Configure remote
server target in the Web Server
Config page settings 1 to 8.
CPU as Server – Configure target
IP as the IP address of the Client.
BOTH CPU and Client MUST be
on the SAME subnet.
Protocol: TCP or UDP
This parameter page is to
configure the CPU to SEND data
as either String or HEX format.
Enable – Check to enable CPU to
Send data
Cycle Send Delay – Time in x10
ms between transmissions
String or HEX – Data format to be
transmitted
String Append – Chars to Add to
end of message:
Nothing
\r – Carriage Return (CR)
\n – Line Feed (LF)
\r\n – CRLF
Start Data – Characters to
transmit at beginning of data
string
Reg Type – CPU registers to be
sent:
None
F – Digital Flags
AF – Analogue Flags
VB – VB Block data
VW – VW Block Data
VD – VD Block data
Reg Start – Start register to be
used if something other than
None was selected above.
Reg Count – Number of
consecutive registers to transmit.
Data Word – Byte order of
applicable data:
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