Chapter 9—C445 Logic Engine and Expansion I/OPower Xpert C445 Global Motor Management Relay MN042003EN—January 2019 www.eaton.com 185TOF—Off-Delay TimerThe TOF function block is an off-delay timer that delays a TRUE to FALSE transition of INto OUT by a time defined by PT. When IN is TRUE, OUT will be set to TRUE and theelapsed time (ET) will be set to zero. When IN transitions to FALSE, the timer startsrunning and updates the ET live. Once the timer reaches the PT, the timer stops runningand sets the OUT to FALSE. If the IN transitions to TRUE before the ET could reach PT, thetimer is stopped and ET is set to 0.Parameter Data type DescriptionIN BOOL Input trigger to start timer—falling edgePT UINT Preset time (x1ms, x10ms, 100ms, x1s)OUT BOOL Timer expired flag—active lowET UINT Elapsed time (x1ms, x10ms, 100ms, x1s)
