Module Bus Scan TimeI
Does changing the Module Bus scan time when the CPU is online, will affect the performance or controller operation. I want to lower the scan time.
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Yes.
Reducing the scan time will increase the CPU load. Module Bus scanning is controlled by the main processor CPU.
Search for "CPU Load" in the on line help and check the "Modulebus" settings
If your bus scan time is currently 0, then it is already scanning as fast as it can. Set the modulebus scan cycle time to 0.5 * the fastest task you have running. (ie scan the bus TWICE as fast as your application) Any faster is pointless. If the scan cycle time is longer than this, then reducing the bus scan cycle time will increase the CPU load, so take care when adjusting the setting.
Answered 5 years ago
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