Omron PLC's Periherial connector to PC RS-232 cable Offical cable names: CQM1-CIF02 or CS1W-CN226
Omron PLC 
Pin Number
PC RS-232
Pin Number
  Description
4 2   PC RxD
7 5   Ground
8 3   PC TxD
9 7   PC RTS
10 8   PC CTS
  4&6   tied together (DTR-DSR)

 
The PLC's connector is not similar to the selected. It has straight left and right sides, and the pin numbering direction is the opposite.

10 pin Alcatel E801 cell phone proprietary of Omron PLC to RS-232 calbe connector layout
10 pin Alcatel E801 cell phone proprietary connector
at the PLC
9 pin D-SUB female connector layout
9 pin D-SUB female connector
at the PC
According to 1 reports in our database (1 positive and 0 negative) this pinout should be correct.

Is this pinout
Omron PLC to RS-232 calbe visual pinout:
Omron PLC to RS-232 calbe diagram
click to enlarge
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