Cycle Time - Omron NSJ CONTROLLERS - 03-2008 Operation Manual

Cycle Time

7-2 Cycle Time
122
Interrupt processing is performed according to the contents of A530 and the
PLC Setup as shown below.
Contents of A530
Power OFF Disabled
Interrupt Task
(PLC Setup)
Enabled
The Controller Section of an NSJ Controller performs overhead processing,
instruction execution, cycle time calculations, I/O refreshing, and peripheral
processing in the same way as a CS/CJ-series CPU Unit. Refer to 10-4 Com-
puting the Cycle Time in the CJ Series PLC Operation Manual (W393) for
information on calculating the cycle time.
For the NSJ Controller, however, the following times must be considered for
communications between the Controller Section and Display Section on the
Inner Bus and for the built-in DeviceNet master (CPU Bus Unit).
Item
Extension added to cycle time for
Inner Bus communications
Extension added to cycle time for
built-in DeviceNet operation
The affect of DeviceNet communications also depends on the number of
words being transferred. Refer to 10-4 Computing the Cycle Time in the CJ
Series PLC Operation Manual (W393) for information on calculating the cycle
time.
A5A5 hex (disabling power
interrupt processing)
All instructions between
DI(693) and EI(694) are exe-
cuted and the Controller Sec-
tion is reset.
Execution of the current instruction is completed, the Power OFF
Interrupt Task is executed, and the Controller Section is reset.
Time
1 ms
0.4 ms
Section 7-2
Other
Execution of the current
instruction is completed and
the Controller Section is reset.