YASKAWA VIPA System MICRO Manual page 78

Deployment CPU M13-CCF0000
Setting standard CPU parameters > Parameter CPU
Cycle / Clock memory
Retentive Memory
Interrupts
Time-of-day interrupts
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n Update OB1 process image cyclically
– This parameter is not relevant.
n Scan cycle monitoring time
– Here the scan cycle monitoring time in milliseconds may be set.
– If the scan cycle time exceeds the scan cycle monitoring time, the CPU enters the
STOP mode.
– Possible reasons for exceeding the time are:
- Communication processes
- a series of interrupt events
- an error in the CPU program
n Minimum scan cycle time
– This parameter is not relevant.
n Scan cycle load from Communication
– Using this parameter you can control the duration of communication processes,
which always extend the scan cycle time so it does not exceed a specified length.
– If the cycle load from communication is set to 50%, the scan cycle time of OB 1
can be doubled. At the same time, the scan cycle time of OB 1 is still being influ-
enced by asynchronous events (e.g. hardware interrupts) as well.
n Size of the process image input/output area
– Here the size of the process image max. 2048 for the input/output periphery may
be fixed (default: 256).
n OB85 call up at I/O access error
– The preset reaction of the CPU may be changed to an I/O access error that
occurs during the update of the process image by the system.
– The VIPA CPU is preset such that OB 85 is not called if an I/O access error
occurs and no entry is made in the diagnostic buffer either.
n Clock memory
– Activate the check box if you want to use clock memory and enter the number of
the memory byte.
The selected memory byte cannot be used for temporary data storage.
n Number of Memory bytes from MB0
– Enter the number of retentive memory bytes from memory byte 0 onwards.
n Number of S7 Timers from T0
– Enter the number of retentive S7 timers from T0 onwards. Each S7 timer occu-
pies 2bytes.
n Number of S7 Counters from C0
– Enter the number of retentive S7 counter from C0 onwards.
n Areas
– This parameter is not supported.
n Priority
– Here the priorities are displayed, according to which the hardware interrupt OBs
are processed (hardware interrupt, time-delay interrupt, async. error interrupts).
Priority
n
– This value is fixed to 2.
n Active
– By enabling 'Active' the time-of-day interrupt function is enabled.
VIPA System MICRO
HB400 | CPU | M13-CCF0000 | en | 18-50