Interrupt Response Times - Omron CP1H-X40D Operation Manual

Computing the Cycle Time
Input Response
Times
PLC Setup
2-7-8

Interrupt Response Times

Input Interrupt Tasks
Input
(Interrupt to
CPU Unit)
Output
Calculation Example
Conditions: Input ON delay
Output ON delay
Cycle time
Minimum I/O response time = 1 ms + 20 ms + 0.1 ms = 21.1 ms
Maximum I/O response time = 1 ms + (20 ms × 2) + 0.1 ms = 41.1 ms
Input response times can be set in the PLC Setup. Increasing the response
time reduces the effects of chattering and noise. Decreasing the response
time allows reception of shorter input pulses, (but the pulse width must be
longer than the cycle time).
Input response time
Input
CPU Unit
Name
Input constants Input response times 00 hex: 8 ms
The interrupt response time for I/O interrupt tasks is the time taken from when
a built-in input has turned ON (or OFF) until the I/O interrupt task has actually
Input ON delay
Cycle time
Cycle time
Instruction Instruction
execution execution
Maximum I/O
response time
1 ms
0.1 ms
20 ms
Input
CPU Unit
Description Settings
10 hex: 0 ms
11 hex: 0.5 ms
12 hex: 1 ms
13 hex: 2 ms
14 hex: 4 ms
15 hex: 8 ms
16 hex: 16 ms
17 hex: 32 ms
Section 2-7
I/O refresh
Instruction
execution
Output ON delay
Input response time
The pulse width is
less than the input
response time, so
it is not detected.
I/O refresh
Default
00 hex (8 ms)
101