Cj1M Functions Arranged By Purpose; High-Speed Processing - Omron CJ1G/H-CPU series Operation Manual

CJ1M Functions Arranged by Purpose

1-9 CJ1M Functions Arranged by Purpose
1-9-1

High-speed Processing

Purpose
Execute a special process very
quickly when the correspond-
ing input goes ON (up differen-
tiation) or OFF (down
differentiation).
(For example, operating a cut-
ter when an interrupt input is
received from a Proximity Sen-
sor or Photoelectric Sensor.)
Count the input signals and
execute a special process very
quickly when the count
reaches the preset value.
(For example, stopping the
supply feed when a preset
number of workpieces have
passed through the system.)
Execute a special process at a
preset count value.
(For example, cutting material
very precisely at a given
length.)
Execute a special process
when the count is within a pre-
set range.
(For example, sorting material
very quickly when it is within a
given length range.)
Reliably read pulses with an
ON time shorter than the cycle
time, such as inputs from a
photomicrosensor.
68
In general, CJ1M CPU Units have basically the same functions as CJ1-H
CPU Units. The functions described in the following tables are unique to the
CJ1M.
I/O used Function
Built-in Interrupt inputs
Inputs 0 to 3
Built-in Interrupt inputs
Inputs 0 to 3
Built-in High-speed
Inputs counters 0 and
1
Built-in High-speed
Inputs counters 0 and
1
Built-in Quick-response
Inputs inputs 0 to 3
Interrupt inputs Executes an interrupt task at the rising or
(Direct mode) falling edge of the corresponding built-in
input (CIO 2960 bits 00 to 03).
Use the MSKS(690) instruction to specify
up or down differentiation and unmask the
interrupt.
Interrupt inputs Decrements the PV for each rising or fall-
(Counter mode) ing edge signal at the built-in input
(CIO 2960 bits 00 to 03) and executes the
corresponding interrupt task when the
count reaches 0. (The counter can also be
set to increment up to a preset SV.)
Use the MSKS(690) instruction to refresh
the counter mode SV and unmask the
interrupt.
High-speed Executes an interrupt task when the high-
counter inter- speed counter's PV matches a target
rupt (Target value in the registered table.
value compari-
Use the CTBL(882) or INI(880) instruction
son)
to start target value comparison.
High-speed Executes an interrupt task when the high-
counter inter- speed counter's PV is within a certain
rupt (Range range in the registered table.
comparison)
Use the CTBL(882) or INI(880) instruction
to start range comparison.
Quick-response Reads pulses with an ON time shorter
than the cycle time (as short as 30 µs) and
inputs
keeps the corresponding bit in I/O memory
ON for one cycle.
Use the PLC Setup to enable the quick-
response function for a built-in input
(CIO 2960 bits 0 to 3).
Section 1-9
Description