GX Works 2 Simulator

[Janus 0]

hi

I am currently simulating plc and GOT HMI program on pc, GX Works 2

 

when I look at ladder logic, output coil stays on, even when one of the input bits is off ? (current_high_alarm)

 

why is this ?

[Janus 0]

is ok, current high alarm is a 'set' bit from a timer block,

looking at the timer block, Q output is high (which feeds current high alarm coil), even though current high alarm bit is reset elsewhere

 

is being held high from the output Q from the timer block ?

 

[Crossbow 296]

If you wrote the same address in two places, yes the timer output is still holding it true.  The one closest to the bottom of the program will win.

[Gambit 327]

And check if this part of the program is being run? Maybe the is a pointer that will jump over this part of the program. 
In this case the output won't change

[Janus 0]

thanks guys, I think it is where the set bit 'current high alarm'  is being held high by the latched timed output . I placed  a 'clear' bit in between the output from timer, and the

set coil 'current high alarm'