Omron SYSMAC CV Series - Cycle Time

465
Instruction Execution Cycle Time
Process Actions Processing time
CV500/CVM1-CPU01-EV2 CV1000/2000/
CVM1-CPU11/21-EV2
Basic
processes
Checks the cycle time and PC memory. 0.6 ms 0.5 ms
Event
processing
Execution of non-scheduled requests for
data processing from peripherals.
0 ms if there is no processing request; 20 ms max.
(12% of cycle time is for servicing.)
Program
execution
Program executed. For ladder programs, total execution time for all
instructions varies with program size, the instructions
used, and execution conditions. Refer to
6-4 Instruction
Execution Times for details.
For SFC programs, refer to the CV-series PC Operation
Manual: SFC
.
Timer
refreshing
Updates the PVs of all timers in the
program.
10 µs + 1.1 µs per timer 8 µs + 0.9 µs per timer
Output
refreshing
Output terminals updated according to
status of output bits in memory (including
Special I/O Units).
8 µs per word (per 16 pts.) 7 µs per word (per 16 pts.)
Input
refreshing
Input bits updated according to the status
of input signals (including Special I/O
Units).
10 µs per word (per 16 pts.) 8 µs per word (per 16 pts.)
Depending on the program, the following interrupt processes is executed in
addition to the processes detailed in the table above. The actual cycle time is the
sum of the cycle time calculated in the table above and the time required for the
processes in the table below.
Process Actions Processing time
CV500/CVM1-CPU01-EV2 CV1000/2000/
CVM1-CPU11/21-EV2
I/O interrupts I/O interrupt programs started with receipt
of interrupt requests from Interrupt Input
Units.
Depends on the I/O interrupt program.
Scheduled
interrupt
Scheduled interrupt program(s) started at
preset interval(s).
Depends on the Scheduled interrupt program.
SYSMAC BUS
refreshing
Masters receive I/O data from Slaves
every 5 ms.
0.6 ms per Master plus
60
µs per word controlled
though each Master
0.5 ms per Master plus
50
µs per word controlled
though each Master
TIMH(015)
refreshing
Updates the PVs of high-speed timers in
the program every 10 ms.
12 µs + 0.8 µs per timer 10 µs + 0.7 µs per timer
Timer
refreshing
Updates the PVs of all timers in the
program every 80 ms if the cycle time
exceeds 80 ms.
10 µs + 1.1 µs per timer 8 µs + 0.9 µs per timer
I/O bus check Checks the I/O bus on the CPU,
Expansion CPU, and Expansion I/O
Racks
0.7 µs every 20 ms 0.6 µs every 20 ms
Interrupt Processing
Cycle Time Section 6-2