Cpm2A/Cpm2C High-Speed Counters - Omron CPM1 - PROGRAMING MANUAL 02-2001 Programming Manual

CPM2A/CPM2C High-speed Counters

2-2

CPM2A/CPM2C High-speed Counters

High-speed
counters
Types of High-speed
Counters
CPM2A CPU Units and most CPM2C CPU Units have five points for high-speed
counters: One point for a high-speed counter with a maximum response fre-
quency of 20 kHz, and four points for interrupt inputs (counter mode).
CPM2C CPU Units with 10 I/O points have four points for high-speed counters:
One point for a high-speed counter with a maximum response frequency of
20 kHz, and three points for interrupt inputs (counter mode).
High-speed counter
1 point
Interrupt inputs
(counter mode)
4 points
(2 points in CPM2C CPU
Units with 10 I/O points
and CPM2C-S CPU Units)
The CPM2A/CPM2C provides both a built-in high-speed counter and built-in in-
terrupt inputs.
High-speed Counter
The built-in high-speed counter is a counter based on inputs to the CPU Unit's
built-in points 00000 to 00002. The high-speed counter itself has one point, and
it can provide either an incrementing/decrementing or just an incrementing
count depending on the mode setting.
Input No. Response
(See note.) frequency
00000
5 kHz
00001 0000
00002
20 kHz
Note Input points not used for counter inputs can be used as ordinary inputs.
Interrupt Inputs (Counter Mode)
Interrupt inputs (counter mode) are counters based on inputs to the CPU Unit's
built-in points 00003 to 00006 (00003 to 00004 in CPM2C CPU Units with 10 I/O
points and in CPM2C-S CPU Units). These counters have four points, and they
can provide either an incrementing or decrementing count depending on the
mode setting. Since this function utilizes interrupt inputs for counting, it is not
possible to use the same inputs for other interrupt inputs.
Input No. Response
(See note.) frequency
2 kHz
00003
00004
00005
00006
Note 1. Input points not used for counter inputs can be used as ordinary inputs.
No interrupts
Target value com-
parison interrupts
Count check
interrupts
Range comparison
interrupts
No interrupts
Count-up
interrupts
Input mode (count value)
Differential phase input mode
(-8388608 to 8388607)
Pulse + direction input
mode(-8388608 to 8388607)
Up/down pulse input mode
(-8388608 to 8388607)
Increment mode
(0 to 16777215)
Input mode (count value)
Incrementing counter g
(0000 to FFFF) (0000 FFFF)
Decrementing counter
(0000 to FFFF) (0000 to FFFF)
Section 2-2
Control method
Target value
co pa so comparison interrupts e up s
Range comparison
interrupts
Control method
Count-up interrupts p p
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