Guest Justin Posted August 25, 2005 Report Posted August 25, 2005 I am trying to force my inputs on with the gxdeveloper. i am used to being able to do this but am having trouble with this program some of the memory bits will force but not all ? please help justin Quote
panic mode Posted August 25, 2005 Report Posted August 25, 2005 search older threads. you can "force" input high but if the phisical input is high (connected sensor is "ON" for example), you cannot force it low... Quote
Guest Old'un Posted August 30, 2005 Report Posted August 30, 2005 The effects of forcing depends on the type of processor being used. If the processor supports force registration then I/O can be forced irrespective of the hardware status. Quote
Guest Guest_jerrycat Posted August 30, 2005 Report Posted August 30, 2005 i agree with Panic Mode, the best way to Force input is by putting the PLC in stop. the program is not executed at all, all input and output can than be forced Quote
Crossbow Posted August 31, 2005 Report Posted August 31, 2005 One thing I have done for testing is add M bits to my program at points where I might want to force. Say for example X0 turns on Y0. I will OR M0 around X0 and then I can force M0. It adds a couple steps to the program, but most of my programs have taken less than 1/4 of the PLC's available memory even after my extra code. Quote
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.