Trying to force inputs & outputs. It's not working

[308guru]

I've got an FX1N and I'm having trouble trying to force inputs & outputs. It's not working most of the time. I have some outputs that are used in the program. The program right now has them turned off until something turns them on. If I enter the output number in the "Device Test" and press "force on", nothing happens. Even though the program is telling the output to be off, the point of forcing is to be able to turn it on no matter what right? If the output is unused in the program and I force it, the output goes on.

[Gambit]

The name force is badly choosen. It's not possible to FORCE the output in this case the program will rst at the end of the scan

[308guru]

I guess I'm used to RXLogix where Force actually means Force. Thanks for the info. So, I guess I'm left wondering what the purpose of the Device Test screen is. If you can't force something what is it good for?

[Gambit]

It's because of the PLC type you are using if you use a newer type of PLC it is possible to FORCE

[Goody]

forcing an input on (X) will force it on for 1 scan. This makes it like a one-shot. Forcing M bits will allow forcing on if there is no coil of the same number. You can use temporary M bits to bridge inputs to force them on

[panic mode]

if you want to test i/o (outputs really), you can put cpu in stop mode or... add BMOV as last scanned instruction and copy block of unused memory to outputs. then you can toggle memory bits, their copy will control outputs and you can still see PLC do it's magic.