Omron CPM1 Programming Manual

414
CPM1/CPM1A Cycle Time and I/O Response Time Section 7-2
3. The Slave’s communications servicing occurs just after the transmission is
completed.
Calculation formula = Input ON response time + Master’s cycle time + Slave’s
cycle time + Output ON response time
Maximum I/O Response
Time
The CPM1/CPM1A takes the longest to respond under the following circum-
stances:
1,2,3... 1. The CPM1/CPM1A 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 ser-
vicing ends.
I/O Maximum Response
Time
Input ON response time + Master’s cycle time x 2 + Transmission time x 3 +
Output ON response time
Output
point
Master's cycle time (10 ms)
Program
execution
Transmission time (12 ms)
Slave's cycle time (15 ms)
Min. I/O response time = 8+10+12+15+10 = 55 ms
Input
point
Input
bit
I/O refresh
Overseeing, communica-
tions, etc.
Input ON delay (8 ms)
Master to
Slave
Output ON
delay (10 ms)
Program
execution
CPU
processing
CPU
processing
Master
Slave
Output
point
I/O refresh
Peripheral port servicing
Input
point
Input
bit
Program
execution
CPU
processing
Master
Slave
Input ON response time
Master #1
Trans-
mission
time
(Data transmission according to input point
Program
execution
Program
execution
Program
execution
CPU
processing
Program
execution
Program
execution
Slave #1
Program
execution
Program
execution
Slave #2
Slave #3
Master to Slave
Trans-
mission
time
Slave to Master
Transmission time
Master to Slave
Maximum I/O response time = 8 + 10 x 2 + 12 x 3 + 15 x 3 + 10 = 119 (ms)
Output OFF
response time

Omron CPM1 Specifications

General

Model	CPM1
Manufacturer	Omron
Instruction Set	Basic and advanced instructions
Power Supply	100 to 240 VAC or 24 VDC
Communication	RS-232C
I/O Points	10, 20, 30, or 40 points depending on the model
Timers	Yes, multiple timers available
Counters	Yes, multiple counters available
Input Voltage	24V DC
Output Type	Relay or transistor
Number of I/O Points	10, 20, 30, 40
Communication Ports	RS-232C (optional)
Operating Temperature	0°C to 55°C
Storage Temperature	-20°C
Humidity	10% to 90% (non-condensing)
Dimensions	Varies depending on the model
Weight	Varies depending on the model
Program Memory	2048 steps (2K steps)