Device/Label Access Service Processing Constant Wait Function - Mitsubishi Electric MELSEC iQ-R Series User Manual

Device/label access service processing constant wait function

This function improves the communication response of device/label access service processing requests.
Based on SM315 (Service processing constant wait setting flag) and SD315 (Service processing constant wait status setting),
device/label access service processing requests are accepted until the time or ratio set for the device/label access service
processing setting of the CPU parameters is reached.
Even if there is no request during device/label access service processing, the function waits until the set time is reached to
allow any request accepted while waiting to be processed in the same scan and its response to be returned, thereby
improving the communication response for device/label access service processing requests.
The response becomes faster because service processing requests are accepted until the time set for the
device/label access service processing setting is reached. Regardless of whether there is any service
processing request from a peripheral, the scan time is extended by the period of time set for the device/label
access service processing setting. Therefore, check that the extension of the scan time does not affect control
before using this function.
Before using the device/label access service processing constant wait function, check the versions of the
CPU module and engineering tool used. ( Page 747 Added and Enhanced Functions)
8 RUNNING A PROGRAM
8.2 Scan Time
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