Omron CPM1 Programming Manual page 418

CQM1 Cycle Time and I/O Response Time
Input
point
Input ON delay
Input
Master
bit
CPU
processing
Maximum I/O Response
Time
1,2,3...
Input
point
Input ON delay
Input
Master
bit
CPU
processing
One-to-one link
communications
Slave
3. The slave executes communications servicing immediately after comple-
tion of communications.
Instruction
execution
One-to-one link
communications
CPU
processing
Slave
The minimum I/O response time is as follows:
Input ON delay:
Master cycle time:
Transmission time:
Slave cycle time:
+ Output ON delay:
Minimum I/O response time:
The CQM1 takes the longest to respond under the following circumstances:
1. The CQM1 receives an input signal just after the input refresh phase of the
cycle.
2. The master to slave transmission does not begin on time.
3. Communications are completed just after the slave executes communica-
tions servicing.
Instruction Instruction
execution execution
Master to
Slave
CPU
processing
Cycle time
Instruction
execution
Master to
Slave
Instruction
execution
Output point
8 ms
10 ms
39 ms
15 ms
10 ms
82 ms
I/O refresh
Overseeing, communica-
tions, etc.
Cycle time
Instruction
execution
Slave to Master to
Master Slave
Instruction Instruction
execution execution
Output point
Section 7-1
I/O refresh
Overseeing, communica-
tions, etc.
Instruction
execution
Output ON
delay
Instruction
execution
Output ON
delay
397