View Full Version : FX Controller Rolling Lockout Counter
03-13-2009, 06:49 PM
Has anyone done the below logic with FX Builder?
I am monitoring HP LP switches on a compressor. I need to lockout compressor if these safeties trip 3 times in 1 hour.
I know how to do the latch but cant figure out the 3 times in 1 hour logic.
I remember in Honewell Care they had a module that would do just the thing.
Anybody got any examps they want to share???
Thanks in advance
03-13-2009, 07:17 PM
Look at the alarm blocks, one of them has just that function. It would automatically reset for however many times you want it your timeframe. This is just from memory though, check it out.
03-13-2009, 08:09 PM
ddcfreak is correct
you want the manual reset binary alarm
Manual Reset Binary Alarm
This object is used to define number of Auto-
Resets which have to be triggered within a defined
period before the Manual Reset becomes
mandatory. The object will lock its output requiring
a Manual Reset when the OFF to ON transition
frequency of the input signal will exceed a defined
level. This level is defined by AUTORESETNUMBER
in the TIMEPERIOD. The LATCH output is triggered
ON only if a Manual Reset is required.The reset
action is based on a digital reference that can be
either a digital input or display key. The only LATCH
value will be stored in case of Power-Fail.
03-14-2009, 09:19 AM
Thanks bros, It never dawned on me to look in the ALARMS.
This support is what makes this forum!!!!
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