Excessive data communication on the MS/TP bus can degrade system performance. To reduce the load on the bus, consider the following:
-
Unmap points you do not need.
-
Minimize the number of COVs on the bus; see Counting the COVs.
-
Check and increase the COV increment for noncritical points.
-
Use a timed COV interval for fast changing points. Set the Use COV Min Send Time attribute to True.
-
Lengthen the COV timed interval COV Min Send Time 10-255 in the device object. The default is 15 seconds.
-
-
Check for and correct unstable sensors.
-
Reduce the number of devices on the bus, if possible.
-
If running at less than 38.4k baud, increase the baud rate (if possible).
-
Verify repeaters, if applicable.
-
Verify that repeaters are used where needed.
-
Verify that repeaters are configured and wired correctly.
-