2 POSITIONING DEDICATED SIGNALS
23
2
Internal processing of the Motion CPU
Internal processing of the Motion CPU is divided into two cycles. The "operation cycle" and the "main cycle".
*1 Can be monitored with "Motion operation cycle (SD522)"
*2 Can be monitored with "Scan time (SD520)" (Maximum value can be monitored with "Maximum scan time (SD521)")
■
Operation cycle
The processing required for every operation cycle is executed. This processing includes data communication with the servo
amplifier, execution of fixed-cycle tasks of the Motion SFC, and generation of servo command values for every operation
cycle.
The processing time changes according to the number of servo axes, the servo program being executed, etc.
When the operation cycle exceeds the setting in [Motion CPU Common Parameter]
[Basic Setting]
"Operation Cycle",
"[St.1046] Operation cycle over flag (R: M30054/Q: M2054)" turns ON.
■
Main cycle
Using the free time after the processing in operation cycle, the automatic refresh and normal tasks of the Motion SFC, as well
as communication with MT Developer2 are executed.
The processing time in the main cycle changes according to the free time after the processing in operation cycle, the number
of automatic refresh transmissions, and the number of executed normal tasks of the Motion SFC, etc.
When the main cycle becomes longer, it can be shortened by increasing the operation cycle setting time in [Motion CPU
Common Parameter]
[Basic Setting]
"Operation Cycle " which increases free time.
Refer to the following for the monitoring of processing times of operation cycle and main cycle.
MELSEC iQ-R Motion controller Programming Manual (Common)
Cautions
For positioning dedicated signals labelled as "operation cycle" in refresh cycles and fetch cycles, when axes are operating at
the low speed operation cycle with the mixed operation cycle function, the refresh cycle and fetch cycle for these axes is the
"low speed operation cycle".
Operation cycle
Main cycle
1 Operation cycle
: One main cycle process (processing time will change)
Main cycle (1 cycle)
*2
Main cycle (1 cycle)
*2
*1
Содержание MELSEC iQ-R16MTCPU
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