I noticed there is a potential issue with the Write Outputs command "WO" when using Host Communications. If any outputs are supposed to be controlled locally by the PLC then sending a "WO" command can override that control. One example where this is a problem is when using a stepper motor. The direction output gets "confused".
So am I right in determining that the only way to remotely control individual outputs rather than entire banks is to use the MODBUS protocol?