Yaskawa NX100 EA1400N Serial I/O error

robot-forum.com/attachment/35018/Hi folks. New Robot tech here. Working on Yaskawa NX100 EA1400 robot. Refurb'd welding robot that we are trying out and every time we power up, we get a Serial I/O fault. You have to manually toggle the serial I/0 check release output to clear. Looking at outputs, cards, parameters but can't seem to figure out why we have to toggle this after every power cycle yet.

message that comes up every time we power up cell. Have to toggle RELAY ON output 1019 to clear

No PLC set up in our repair area so is there a parameter you need to set in order to let robot know there is no PLC connection rather than toggling output every time we power up?