Chapter 9—C445 Logic Engine and Expansion I/O
182 Power Xpert C445 Global Motor Management Relay MN042003EN—January 2019 www.eaton.com
Timers and Counters Group
CTD—Down Counter
The CTD function block is a down counter that decrements the counter value (CV) by one
at the rising edge of the count down (CD) trigger. The counter value is preloaded with the
preset value (PV) at the rising edge of load preset (LD) trigger. The counter value is
persistent through power cycle of the device.
Parameter Data type Description
CD BOOL Count down trigger – rising edge
LD BOOL Trigger to preload counter with PV
PV INT Preset value
OUT BOOL Countdown complete flag
CV INT Counter value
Power Loss
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