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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
(10 I/O terminals)
CPM1A-20CDR-j/20CDT-D/20CDT1-D
(20 I/O terminals)
CPM1A-30CDR-j/30CDT-D/30CDT1-D
(30 I/O terminals)
CPM1A-40CDR-j/40CDT-D/40CDT1-D
(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.
CPM1A Features and Functions Section 1-1