CPM1A Features and Functions

Section 1-1

 

 

 

1-1 CPM1A Features and Functions

1-1-1 CPM1A Features

One-piece Construction The CPM1A CPU Units feature a one-piece construction including 10, 20, 30, or 40 built-in I/O terminals. The following three model groups are available: relay output models, sink-type transistor output models, and source-type transistor output models.

CPM1A-10CDR-j/10CDT-D/10CDT1-D CPM1A-20CDR-j/20CDT-D/20CDT1-D

(10 I/O terminals)

(20 I/O terminals)

CPM1A-30CDR-j/30CDT-D/30CDT1-D CPM1A-40CDR-j/40CDT-D/40CDT1-D

(30 I/O terminals)

(40 I/O terminals)

Extra I/O Capacity

Up to three Expansion I/O Units can be connected to a CPM1A-30CDR-j/

 

30CDT-D/30CDT1-D or CPM1A-40CDR-j/40CDT-D/40CDT1-D CPU Unit to

 

add an extra 8 or 20 I/O points for each, for a maximum of up to 100 I/O points.

Input Filter Function

The CPM1A is equipped with a filter function to prevent incorrect operation

 

caused by chatter or noise in the input signal. The user can select an input time

 

constant of 1 ms, 2 ms, 4 ms, 8 ms, 16 ms, 32 ms, 64 ms, or 128 ms.

Low-maintenance Design

Flash memory provides memory backup without a battery.

Input Interrupts

The CPM1A-10CDR-j/10CDT-D/10CDT1-D CPU Units can handle 2 interrupt

 

inputs; the CPM1A-20CDR-j/20CDT-D/20CDT1-D, CPM1A-30CDR-j/

 

30CDT-D/30CDT1-D, and CPM1A-40CDR-j/40CDT-D/40CDT1-D CPU Units

 

can handle 4 interrupt inputs. In addition to normal input interrupts, the CPM1A

 

has a counter mode that counts high-speed input signals and triggers interrupts

 

at fixed count multiples.

Quick-response Inputs

Quick-response inputs can detect input signals with a pulse width as short as

 

0.2 ms regardless of their timing during the PC cycle. Quick-response inputs

 

and interrupt inputs use the same input terminals.

Interval Timer

CPM1A PCs have a high-speed interval timer which can be set from 0.5 ms to

 

319,968 ms. The timer can be set to trigger a single interrupt (one-shot mode) or

 

repeat scheduled interrupts (scheduled interrupt mode).

High-speed Counter

CPM1A PCs have a high-speed counter that can be used in incremental mode

 

or up/down mode. The high-speed counter can be combined with input inter-

 

rupts to perform target value control or zone comparison control that isn’t

 

affected by the PC’s cycle time.

Pulse Output Function

The CPM1A transistor output models have an output function capable of output-

 

ting a pulse of 20 Hz to 2 kHz (single-phase output).

Analog Setting Function

The CPM1A PCs have 2 analog volume controls that can be used to make

 

manual analog settings.

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Omron operation manual CPM1A Features and Functions, 1 CPM1A Features, Section