Am I looking at the right manual here?.
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKE wi8g7u-k9fxAhVai1wKHTDMDH0QFnoECBsQAA&url=https%3A%2F%2Fw ww.yaskawa.com%2Fdelegate%2FgetAttachment%3Fdocume ntId%3DTSE-S800-15%26cmd%3Ddocuments%26documentName%3DTSE-S800-15C.pdf&usg=AOvVaw19DZ9FUJyKRRYWNkE4-N16
Or
https://www.yaskawa.com/delegate/get...E-S800-15C.pdf
I've gone through this twice and there's no mention of RS-232 control?.
It shows that the operator serial port is for a little digital operator unit keypad.
To connect direct to PC it states it needs 'exclusive use cable' type DE9405258
(Mactec will tell me off now)