Minimum send time

Top  Previous  Next

Minimum send time is a mechanism for throttling output network variable updates based on elapsed time. It specifies the time interval in seconds that the device waits before updating the network variable as changes in value occur, even if the value changes by more than the send on delta value. This allows you to manage network traffic by controlling the frequency at which a frequently changing network variable value is sent.

Setting minimum send time to zero causes the network variable to be updated immediately upon value change, within the constraint of send on delta.

SCPTminSendTime is the configuration property for minimum send time. In version 1.72 and greater, the default value for minimum send time is 15 seconds, with the following exceptions: Scheduler functional block network variables have default minimum send time set to 2 seconds and the Real Time Clock functional block network variable has a default minimum send time of 60 seconds.