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126
Using a Programming Console
Section 7-1
7.
Read and clear all errors and messages. See 7-2-5 Reading/Clearing Er-
ror Messages for details.
8.
Start programming.
7-1-5
Entering the Password
To gain access to the PLC’s programming functions, you must first enter the
password. The password prevents unauthorized access to the program.
The PLC prompts you for a password when PLC power is turned on or, if PLC
power is already on, after the Programming Console has been connected to
the PLC. To gain access to the system when the “Password!” message
appears, press CLR and then MONTR. Then press CLR to clear the display.
If the Programming Console is connected to the PLC when PLC power is
already on, the first display below will indicate the mode the PLC was in
before the Programming Console was connected. Ensure that the PLC is in
PROGRAM mode before you enter the password. When the password is
entered, the PLC will shift to the mode set on the mode switch, causing PLC
operation to begin if the mode is set to RUN or MONITOR. The mode can be
changed to RUN or MONITOR with the mode switch after entering the pass-
word.
Automatic Mode Change
When the PLC is in RUN mode with a Programming Console connected to the
peripheral port of the CPU Board, if a PT is connected to the Board’s RS-
232C port using Host Link mode, the following message will be displayed at
the Programming Console indicating that a password is required to continue
operation (using the Programming Console).
This is because, in order to write data to the CPU Unit, the PT changed the
operation mode from RUN mode to MONITOR mode. To continue operation
using the Programming Console, it is necessary to input the password again.
Inputting the Password
• The mode will not be changed if the PT is connected via an NT Link.
Indicates the mode set by the mode selector switch.
<PROGRAM> BZ
<PROGRAM>
PASSWORD!
CLR
MONTR
<MONITOR>
PASSWORD!
<MONITOR>
PASSWORD!
CLR
MONTR
<MONITOR> BZ
CLR
00000
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