Omron CJ1M-CPU series User Manual

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Details Section 6-2
6-2 Details
Note 1. The following data is write-protected when pin 1 is ON: the user program
and all data in the parameter area such as the PLC Setup and registered
I/O table. Furthermore when pin 1 is ON, the user program and parameter
area won’t be cleared even when the memory clear operation is performed
from a Programming Device.
2. The auto-detect goes through baud rates in the following order: Program-
ming Console
→ Peripheral bus at 9,600 bps, 19,200 bps, 38,400 bps, and
115,200 bps. Programming Devices that aren’t in Peripheral Bus Mode
and devices in Peripheral Bus Mode operating at 51,200 bps will not be de-
tected.
Pin Function Setting Description
1 Write-protection for
user program
memory (UM) (See
note 1.)
ON Write-protected User program memory is write-protected when this pin
is ON. Turn ON to prevent the program from being
changed accidentally.
OFF Read/write
2 Automatic transfer
of the program at
start-up
ON Yes The program (AUTOEXEC.OBJ) and PLC Setup
(AUTOEXEC.STD) will be transferred from the Memory
Card to the CPU Unit automatically at start-up when this
pin is ON. (See note 4.)
A PLC’s software (program and PLC Setup) can be
completely initialized just by inserting a new Memory
Card and turning on the power. This can be used to
switch the system to a new arrangement very quickly.
Note When pin 7 is ON and pin 8 is OFF, reading from
the Memory Card for easy backup is given
priority; even if pin 2 is ON, the program will not
be automatically transferred.
OFF No
3 Not used. --- --- ---
4 Peripheral port
communications
parameters
ON Use parameters set in
the PLC Setup.
• Leave this pin OFF when using a Programming Con-
sole or CX-Programmer (peripheral bus setting) con-
nected to the peripheral port.
• Turn this pin ON when the peripheral port is being
used for a device other than a Programming Console
or CX-Programmer (peripheral bus setting).
OFF
(default)
Auto-detect Program-
ming Device
(See note 2.)
5 RS-232C port com-
munications
parameters
ON Auto-detect Program-
ming Device
(See note 3.)
• Leave this pin OFF when the RS-232C port is being
used for a device other CX-Programmer (peripheral
bus setting) such as a Programmable Terminal or
host computer.
• Turn this pin ON when using CX-Programmer
(peripheral bus setting) connected to the RS-232C
port.
OFF
(default)
Use parameters set in
the PLC Setup.
6 User-defined pin ON A39512 ON The ON/OFF status of this pin is reflected in A39512.
Use this function when you want to create an Always-
ON or Always-OFF condition in the program without
using an Input Unit.
OFF
(default)
A39512 OFF
7 Easy backup set-
ting
ON Writing from the CPU
Unit to the Memory Card
Press and hold the Memory Card Power Supply Switch
for three seconds.
Restoring from the Mem-
ory Card to the CPU
Unit.
To read from the Memory Card to the CPU Unit, turn ON
the PLC power. This operation is given priority over
automatic transfer (pin 2 is ON) when power is ON.
OFF
(default)
Verifying
contents of Memory
Card.
Press and hold the Memory Card Power Supply Switch
for three seconds.
8 Not used OFF
(default)
Always OFF.

Omron CJ1M-CPU series Specifications

General

Brand	Omron
Model	CJ1M-CPU series
Category	Controller
Language	English