20.1 PLC Connection 20-7
Web Controller
The following table shows the signal level and the communication protocol for each PLC. Other parameters (7 bits, 1 bit, even)
are fixed.
Procedure
Connect the computer (PC) to the web controller and make the setting for the PLC with the web browser. For more
information, refer to the PLC manual issued by the manufacturer.
System configuration (RS-232C protocol/serial protocol passive HI protocol)
Make settings for “Interface Type”, “Transmission Control Procedure”, “Transmission Speed”.
Available Device Memory
The available setting range of device memory varies depending on the PLC model. Be sure to set within the range available for
the PLC to be used. Use [TYPE] when assigning indirect device memory for macro programs.
PLC Port Signal Level Communication Protocol
EH-WD10DR SERIAL RS-232C
Transmission control protocol 1
Transmission control protocol 2
EH-WA23DR PORT1
RS-232C
Transmission control protocol 1
Transmission control protocol 2
RS-422
Transmission control protocol 1
Transmission control protocol 2
Transmission control protocol 1 with port
Transmission control protocol 2 with port
RS-485
Transmission control protocol 2
Transmission control protocol 1 with port
Transmission control protocol 2 with port
Device Memory TYPE Remarks
WR (internal output/word) 00H
X (external input) 01H WX as word device
Y (external output) 02H WY as word device
L (CPU link area) 03H WL as word device
M (data area) 04H WM as word device
TC (timer, counter/elapsed time) 05H
R (internal output/bit) 06H
TD (timer, counter/contact) 07H
WN (network input/output) 08H
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