H929049B0500 以便在达到服务间隔时显示通知

The delay in opening the retention timer deviates from the style of the other two timers in Studio 5000. When the step is true, H929049B0500 starts counting, but it does not reset when the step is false. It retains any counts it accumulates. A simple method is to repair a machine every 100 hours of operation. You want the timer to accumulate values during runtime and stop accumulating when not running, but keep the count so that notifications are displayed when the service interval is reached.

In logic diagram 4, the layout of RTO is similar to the previous two examples. When the motor is running and the steps are true, we start counting. When the motor stops running, the count remains unchanged while waiting for the next step to become true. When the count reaches the preset value, the Done bit becomes true.

The H929049B0500 instruction starts counting when its ladder becomes true. When the ladder becomes false, it does not reset the count. When the cumulative count reaches the preset value, it will trigger the Done bit.

Our discussion on RTO style timers requires us to handle an instruction that can be used in many places and capacities in Studio 5000. The reset command can be used to reset the count of any type of timer, regardless of which stage it is in the counting cycle. When the reset is triggered, it resets the count of the relevant timer to zero. To associate the reset with the timer you want, simply place the timer’s tag name in the tag of the instruction.

In this logic line, you can see that I have set up an H929049B0500. When the user clicks a button to inform the PLC, for the RTO example above, when the service is completed, this Reset will be triggered.