The Controller Performance dialog helps identify potential performance issues in MQ, MX, PK, SX, SQ, and SZ controllers or Ethernet I/O cards (EIOC). To open the Controller Performance dialog, right-click a controller, and then select Time Utilization Chart from the shortcut menu.
| Control |
Control performance represents the amount of load on the controller as a result of module execution. Control loading can be reduced by lowering module execution rates. For example, a module that executes at a scan rate of 200 ms will result in five times the control load as a module configured with a scan rate of one second. Verify that modules are not executing faster than they need to be, based on process characteristics. |
| Comms |
Communication performance represents the amount of controller resources consumed to transmit and receive data over the controller’s Ethernet networks. This includes both the primary and secondary active control networks. For the SZ controller model, this also includes the Local Safety Network and the MODBUS port, if enabled. Communication loading can be reduced by removing parameters from displays, eliminating controller-to-controller references, and setting the scan rate appropriately, based on process characteristics, for all types of remote network I/O, such as Zone 1 and Zone 2 I/O or CHARMs I/O cards. |