Omron CS1W-NC113 - REV 02-2008, Manual

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Appendix A Performance Characteristics
316
Although the average data saving time is 300 ms, it may be as long as 33 s in some cases. If it is longer than 33 s, a
flash memory error (error code 9300) will be generated, and the data saving operation will be interrupted.
SAVE DATA Bit
Data Transferring Flag
Data saving time
Effect on the Programmable Controller Cycle Time
The PC’s cycle time increases if Units are added, or if the IOWR or IORD instructions are executed. The times by
which the cycle time will increase are shown in the following table.
Operation NC1
j
3 NC2
j
3 NC4
j
3
Time increase for each Unit mounted 0.29 ms 0.32 ms 0.41 ms
Time increase for each execution of the IOWR instruction (max. value) 0.7 ms 0.7 ms 0.6 ms
Time increase for each execution of the IORD instruction (max. value) 0.7 ms 0.7 ms 0.6 ms
Minimum Operation Time
The minimum operation time for the Position Control Unit is 10 ms. With memory operation, when a sequence with
a “continuous” completion code is executed and the positioning time for that sequence is shortened according to
the amount of movement and the target speed, the operation time required for the continuous completion cannot
be assured and positioning will be executed as if the completion code were “automatic.” When using a sequence
with a “continuous” completion code, be sure to adjust the target speed and target position so that the operation
time will be equal to or greater than the minimum operation time.
•
Sequence operation time
≧
Minimum operation time
Speed
Sequence n
Sequence n+1
Sequence n operation time
Time
•
Sequence operation time < Minimum operation time
Speed
Sequence n
Sequence n+1
External Interrupt Processing Time
The response time is as shown below with respect to external inputs such as limit sensors and interrupt inputs. The
Position Control Unit continues the current operation during the response time for each external input.