Omron CPM1 Programming Manual

413
CPM1/CPM1A Cycle Time and I/O Response Time Section 7-2
Maximum I/O Response
Time
The CPM1/CPM1A takes longest to respond when it receives the input signal
just after the input refresh phase of the cycle, as shown in the illustration
below. In that case, a delay of approximately one cycle will occur.
7-2-4 One-to-one Link I/O Response Time
When two CPM1/CPM1As are linked one-to-one, the I/O response time is the
time required for an input executed at one of the CPM1/CPM1As to be output
to the other CPM1/CPM1A by means of one-to-one link communications.
The minimum and maximum I/O response times are shown here, using as an
example the following instructions executed at the master and the slave. In
this example, communications proceed from the master to the slave.
The following conditions are taken as examples for calculating the I/O
response times. In CPM1/CPM1A PCs, LR area words LR 00 to LR 15 are
used in one-to-one links and the transmission time is fixed at 12 ms.
Input ON delay: 8 ms (input time constant: default setting)
Master cycle time: 10 ms
Slave cycle time: 15 ms
Output ON delay: 10 ms
Peripheral port: Not used.
Minimum I/O Response
Time
The CPM1/CPM1A responds most quickly under the following circumstances:
1,2,3... 1. The CPM1/CPM1A 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.
Input ON delay (8 ms)
I/O refreshing
Input
point
Input
bit
Output
point
Program execution
and other processes
(15 ms)
Max. I/O response time = 8+15 2+10 = 48 ms
Output ON delay (10 ms)
I/O refreshing
Program execution
and other processes
(15 ms)
I/O refreshing
Input
Output (LR) Input
(LR)
Output
Master Slave

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)