Details; User Program Memory - Omron CJ - 08-2008 Operation Manual

Details

6-2 Details
Pin Function
1 Write-protection for
user program
memory (UM) (See
note 1.)
2 Automatic transfer
of the program at
start-up
3 Not used.
4 Peripheral port
communications
parameters
5 RS-232C port com-
munications
parameters
6 User-defined pin
7 Easy backup set-
ting
8 Not used
Note
Setting
ON Write-protected
OFF Read/write
ON Yes
OFF No
--- ---
ON Use parameters set in
the PLC Setup.
OFF Auto-detect Program-
(default) ming Device
(See note 2.)
ON Auto-detect Program-
ming Device
(See note 3.)
OFF Use parameters set in
(default) the PLC Setup.
ON A39512 ON
OFF A39512 OFF
(default)
ON Writing from the CPU
Unit to the Memory Card
Restoring from the Mem-
ory Card to the CPU
Unit.
OFF Verifying
(default) contents of Memory
Card.
OFF Always OFF.
(default)
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.
Description
User program memory is write-protected when this pin
is ON. Turn ON to prevent the program from being
changed accidentally.
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, reading from the Memory
Card for easy backup is given priority; even if pin
2 is ON, the program will not be automatically
transferred.
---
• 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).
• 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.
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.
Press and hold the Memory Card Power Supply Switch
for three seconds.
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.
Press and hold the Memory Card Power Supply Switch
for three seconds.
Section 6-2
281