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CJ1M Functions Arranged by Purpose Section 1-9
1-9-4 Serial PLC Link
Note The CJ1W-CIF11 is not insulated, so the total transmission distance for the
whole transmission path is 50 m max. If the total transmission distance is
greater than 50 m, use the insulated NT-AL001, and do not use the CJ1W-
CIF11. If only the NT-AL001 is used, the total transmission distance for the
whole transmission path is 500 m max.
1-9-5 Comparison with the CJ1W-NC Pulse Outputs
Purpose I/O used Function Description
Share alarm information among
multiple CJ1M CPU Units.
None. Serial PLC Links Use the PLC Setup to set the serial communica-
tions mode for the RS-232C communications
port to Serial PLC Link Polling Unit or Polled
Unit.
Connect a CJ1W-CIF11 Converter to the built-in
RS-232C port to connect multiple CPU Units via
RS-422A/485. (RS-232C can also be used for a
1:1 connection.)
In this way, up to 10 words of data can be
exchanged per CPU Unit.
When an OMRON PT is connected
to a CJ1M CPU Unit by NT Link
(1:N mode), share the connection
for the above Serial PLC Link.
The PT can be connected via RS-422A/485 at
the Serial PLC Link, and made to communicate
with the CPU Unit through a 1:N NT Link.
Item CJ1M CJ1W-NC Position Control Unit
Control method Controlled with the ladder program's Pulse
Output instructions (SPED(885), ACC(888),
and PLS2(887)).
Controlled with the Start Command Bit (Rel-
ative Movement Command Bit or Absolute
Movement Command Bit).
Changing the speed during
positioning
When the SPED(885) instruction (indepen-
dent), ACC(888) instruction (independent),
or PLS2(887) instruction is in progress,
each instruction can be executed again to
change the speed.
Override
Changing the speed during
speed control
When the SPED(885) instruction (continu-
ous) or ACC(888) instruction (continuous) is
in progress, each instruction can be exe-
cuted again to change the speed.
Override
Jog operation External inputs can be used in the ladder
program to start and stop operation with the
ACC(888) instruction (continuous) and
SPED(885) instruction (continuous).
Controlled with the Jog Start Bit, Jog Stop
Bit, and Direction Specification Bit.
Origin search Controlled with the ladder program's
ORG(889) instruction.
Performed with the Origin Search Bit.
Origin return Controlled with the ladder program's
ORG(889) instruction.
Performed with the Origin Return Bit.
Teaching Not supported. Performed with the Teaching Start Bit.
Fixed distance feed interrupt
(Continuous output with posi-
tioning)
Execute positioning with the PLS2(887)
instruction during a speed control operation
started with SPED(885) (continuous) or
ACC(888) (continuous).
Performed with the Fixed Distance Feed
Interrupt Start Bit.
Change the target position
during positioning.
(Multiple Start)
When a PLS2(887) instruction is being exe-
cuted, another PLS2(887) instruction can
be started.
Performed with the Start Command Bit (Rel-
ative Movement Command Bit or Absolute
Movement Command Bit) during direct
operation.
Decelerate to a stop during
positioning.
Execute an ACC(888) (independent)
instruction during a positioning operation
started with ACC(888) (independent) or
PLS2(887).
Performed with the Decelerate to Stop Bit.
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