tny
September 13th, 2007, 05:34 AM
hi all;
as you know siemens TD200 panels sets the related bits when pushed a button, and we must reset it from the program.
do you know an easy way for momentarly setting a bit with it?
in my application, i want to push a Fkey for starting a motor in manual mode and release it to stop the motor.
so i had to read the F key, and set an offdelay timer with it and reset the Fkey bit in the same rung. of delay timer filters the cyclic pulses of Fkey (every cycle TD200 sets the bit and PLC resets it, so pulses occur)
timer values above 600ms can filter the pulses (start stops of the motor)
values less than 600 ms still can cause pulses.
do you know a better way for it?
as you know siemens TD200 panels sets the related bits when pushed a button, and we must reset it from the program.
do you know an easy way for momentarly setting a bit with it?
in my application, i want to push a Fkey for starting a motor in manual mode and release it to stop the motor.
so i had to read the F key, and set an offdelay timer with it and reset the Fkey bit in the same rung. of delay timer filters the cyclic pulses of Fkey (every cycle TD200 sets the bit and PLC resets it, so pulses occur)
timer values above 600ms can filter the pulses (start stops of the motor)
values less than 600 ms still can cause pulses.
do you know a better way for it?