Quick-Response Inputs; Cpm1/Cpm1A Quick-Response Inputs - Omron CPM1 Programming Manual

Ladder Diagram
Programming

2-12 Quick-response Inputs

2-12-1 CPM1/CPM1A Quick-response Inputs

Quick-response Operation
Setting Quick-response
Inputs
The following table shows the words and bits where the analog settings are
stored.
Word
SR 250 00 to 15
SR 251 00 to 15
In the following example program, the analog control SV (0000 to 0200 BCD)
stored in SR 250 is set as a timer. The timer's set range is 0.0 s to 20.0 s.
Start bit
Note The operating times for the analog timer shown in the above example will vary
depending on changes in the ambient temperature. Do not use this program for
applications where precise operations are required.
The CPM1/CPM1A have quick response inputs that can be used to enable in-
putting shorter signals.
All 10-point CPU Units have 2 quick-response input terminals and the 20-, 30-,
and 40-point CPU Units have 4 quick-response input terminals. The same termi-
nals are used for quick-response inputs and interrupt inputs.
Quick-response inputs have an internal buffer, so input signals shorter than one
cycle can be detected. Signals with a pulse width as short as 0.2 ms can be de-
tected, regardless of their timing during the PC cycle.
Input signal
(00003)
IR 00003
CPU Unit
10-point CPU Units
20-, 30-, 40-point CPU Units
The input bits in the above table can be set as quick-response inputs in
DM 6628, as shown in the following table.
Bit Name
Analog control 0 SV storage area
Analog control 1 SV storage area
Specifies SR 250 for the timer SV.
Overseeing Program I/O
processes execution refreshing
One cycle
Input bits
IR 00003 to IR 00004
IR 00003 to IR 00006
Section
Value
0000 to 0200
(BCD) (BCD)
Overseeing Program I/O
processes execution refreshing
Min. input pulse width
0.2 ms
2-12