Minimum Cycle Time; Functions Related To The Cycle Time - Omron CP1L Operation Manual

Computing the Cycle Time
5: Peripheral Servicing
Details
Services USB port.
Services serial ports
Services communications ports.
Services built-in flash memory access.
Serves Memory Cassette access.
2-7-3

Functions Related to the Cycle Time

Minimum Cycle Time

If a uniform peripheral servicing time hasn't been set in the PLC Setup for
this servicing, 8% of the previous cycle's cycle time (calculated in step (3))
will be allowed for peripheral servicing.
If a uniform peripheral servicing time has been set in the PLC Setup, servic-
ing will be performed for the set time. Servicing will be performed for at
least 0.1 ms, however, whether the peripheral servicing time is set or not.
If the ports are not connected, the servicing time is 0 ms.
If a uniform peripheral servicing time hasn't been set in the PLC Setup for
this servicing, 8% of the previous cycle's cycle time (calculated in step (3))
will be allowed for peripheral servicing.
If a uniform peripheral servicing time has been set in the PLC Setup, servic-
ing will be performed for the set time. Servicing will be performed for at
least 0.1 ms, however, whether the peripheral servicing time is set or not.
If no communications ports are used, the servicing time is 0 ms.
If a uniform peripheral servicing time hasn't been set in the PLC Setup for
this servicing, 8% of the previous cycle's cycle time (calculated in step (3))
will be allowed for peripheral servicing.
If a uniform peripheral servicing time has been set in the PLC Setup, servic-
ing will be performed for the set time. Servicing will be performed for at
least 0.1 ms, however, whether the peripheral servicing time is set or not.
If there is no access, the servicing time is 0 ms.
Set the minimum cycle time to a non-zero value to eliminate inconsistencies in
I/O responses. A minimum cycle time can be set in the PLC Setup between 1
and 32,000 ms in 1-ms increments.
Minimum cycle time
(effective)
Actual cycle
time
This setting is effective only when the actual cycle time is shorter than the
minimum cycle time setting. If the actual cycle time is longer than the mini-
mum cycle time setting, the actual cycle time will remain unchanged.
Minimum cycle time
Actual cycle
time
PLC Setup
Name
Minimum cycle time 0000 to 7D00 hex
(1 to 32,000 ms in 1-ms incre-
ments)
Processing time and fluctuation cause
Minimum cycle time Minimum cycle time
(effective) (effective)
Actual cycle
time
Actual cycle
time
Minimum cycle time
Actual cycle
time
Settings
Section 2-7
Minimum cycle time (effective)
Actual cycle
time
Default
0000 hex: Variable cycle time
91