RSView Button Hold time

Minimal_Subset · May 11, 2006

I have an RSView button which runs a command to toggle a bit in a PLC5 data table. Does any one no how to make the toggle condition last for x seconds then return to its former state.

jtn · May 11, 2006

In RSViewSE or ME you can use a NO or NC button and change the state time. If it needs to be pretty precise you are better off doing the hold time in the PLC.

Minimal_Subset · May 11, 2006

Thanks, it is RSView32 and it is a command button
The command looks like this

#2 = #2 | DEF\BIT_01

#2 is just a 16 bit integer and DEF\BIT_01 is an integer set to equal 2
so the command just or's #2 with DEF\BIT_01 which effectively just turns on Bit 01 in #2. I Would like to make the bit go on when the button is pushed and stay on for x second after it is released, then go off again.

Randy

TConnolly · May 11, 2006

Randy,

I recommend you do the reset in the PLC. I have seen RSView, Factory Link, and CiTect all fail to reset a momentary bit in the PLC, leaving the bit stuck on.

Minimal_Subset · May 11, 2006

Thanks, I would have preferred to do in PLC code, unfortunatly the customers standard is to do this function from a DCS, to keep the plc code consistant I need to accomplish this on the HMI side.

Kim Gold · May 11, 2006

I agree with Alaric that you should do the logic in PLC.
You could latch the bit in RSView and unlatch it in PLC as shown.

Minimal_Subset · May 12, 2006

Thanks for the reply, yes I would prefer to do the "Hold" function in the PLC logic as well but as I said, customer requirements prevents me from doing this. I did find a solution... using VBA code. To Toggle a bit on, we just "OR" the bit with a one, then call a Wait routine, then after the wait time we just "AND" the bit with a Zero. Do the opposite to toggle a bit off then back to on.IF this proves to be unreliable,we will need to revisit the issue.

HLeap · May 12, 2006

Minimal_Subset said:
Thanks, I would have preferred to do in PLC code, unfortunatly the customers standard is to do this function from a DCS, to keep the plc code consistant I need to accomplish this on the HMI side.

Sometimes you just can't save the customers from themselves...

Cantrolcu · May 12, 2006

Use a command instead of the toggle action
set the tag to 1
then pause (for x sec)
then set the tag again to 0
I tested and it works
I hope it works for you too

Luis

RSView Button Hold time

Minimal_Subset

Member

jtn

Member

Minimal_Subset

Member

TConnolly

Lifetime Supporting Member

Minimal_Subset

Member

Kim Gold

Member

Minimal_Subset

Member

HLeap

Member

Cantrolcu

Member

Similar Topics