Omron CPM1 - PROGRAMING MANUAL 02-2001 Programming Manual page 544

CPM2A/CPM2C Cycle Time and I/O Response Time
1, 2, 3...
Input
point
Input
bit
Master
CPU
processing
CPU
processing
Slave
Output
point
Maximum I/O Response Time The CPM2A/CPM2C takes the longest to respond under the following circum-
1, 2, 3...
I/O Maximum Response Time Input ON response time + Master's cycle time
Input
point
Input ON response time
Master
Input
bit
CPU
processing
CPU
processing
Slave
Output
point
526
1. The CPM2A/CPM2C receives an input signal just prior to the input refresh
phase of the cycle.
2. The Master's communications servicing occurs just as the Master-to-Slave
transmission begins.
3. The Slave's communications servicing occurs just after the transmission is
completed.
Input ON delay (10 ms)
Program
execution
Master's cycle time (10 ms)
Transmission time (21 ms)
Min. I/O response time = 10+10+12+15+15 = 62 ms
stances:
1. The CPM2A/CPM2C receives an input signal just after the input refresh
phase of the cycle.
2. The Master's communications servicing just misses the Master-to-Slave
transmission.
3. The transmission is completed just after the Slave's communications servic-
ing ends.
Slave's cycle time
Program
Program
execution
execution
Master #1
Trans-
Master to Slave mission
time
Program
execution
Slave #1
Maximum I/O response time = 10 + 10
Master to
Slave
Program
execution
Slave's cycle time (15 ms)
2 + Output ON response time
Program Program
execution execution
(Data transmission according to input point)
Trans-
Slave to Master mission Master to Slave
time
Program Program
execution execution
2 + 12 3 + 15
Section
I/O refresh
Overseeing, communications
servicing, etc.
Output ON
delay (10 ms)
2 + Transmission time
I/O refresh
Peripheral port servicing
Transmission time
Program
execution
Slave #2
Output OFF
Slave #3
response time
2 + 15 = 111 (ms)
8-2
3 +