rmc150 can't receive the pluse signal

315-2pn profinet update time 2ms , rmc150,cpu cycle time 3ms ,rmc150 loop time =1ms

When i send a command trigger to the rmc150 in a plc cycle time about 3ms,but the rmc150 can’t receive the command.
When i extend the command trigger to about 30ms, the rmc150 can receive it, why?
because the plc cycle time > profinet update time , the rmc150 can receive the command trigger in theory.
Why so long time of the command ,the rmc150 can only receive, i can’t undstand.

I am not sure why. Perhaps adding some items in the Event Log filtering will help troubleshoot this:

  1. In the Event Log, in the toolbar, click the Properties button.
  2. Expand Communications and 10/100 Ethernet.
  3. In the Ethernet I/O Logging box, choose All.
  4. Click OK.

Now, the Event Log will show the PROFINET data each time the data changes. This may give some clues as to what is happening.