Yokogawa Data Acquisition with PID Control CX2000 - Manual (Page 112)

5-2
IM 04L31A01-17E
5.2 Setting the Ladder Communication Protocol
Explanation
The CX supports the ladder communication protocol. Multiple CXs can be connected to
Programmable Logic Controllers (PLCs) that are capable of ladder communications.
RS-485 communications
CX CX CX
Address NO.
PLC
1 2 3
To support ladder communications on the CX, the following parameters must be set on
the serial interface. Set the parameter values to match those of the PLC. The
description of the procedures of setting the parameters starts on the next page.
Baud Rate
Below are the selectable baud rates.
1200, 2400, 4800, 9600, 19200, and 38400
Parity Check
Select the parity check from the following:
Odd, Even, and None
Communication Address
Select an arbitrary address in the range of 1 to 32. The address of the CX connected
to a single PLC must be unique.
Protocol
Select [Ladder] if you wish to communicate using the ladder communication protocol.
Selecting the Communication Type Used to Output the Data in the Internal Memory
and Files on the External Storage Medium
Select [Ethernet] when using output commands (ME, MI, and MO commands) to
output the data in the internal memory of the CX (display, event, TLOG, manual
sample, and report data) and the files on the external storage medium.
[Serial], even if selected, is invalid.
Note
The data length and handshaking settings are invalid in the configuration of the ladder
communication protocol.