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3. Connect the Programming Console to the PC. Make sure that the Pro-
gramming Console is securely connected or mounted to the CPU; im-
proper connection may inhibit operation.
4. Set the mode switch to PROGRAM mode.
5. Turn on PC power.
6. Enter the password.
7. Clear memory.
Each of these operations from entering the password on is described in detail
in the following subsections. All operations should be done in PROGRAM
mode unless otherwise noted.
4-5-1 Entering the Password
To gain access to the PC’s programming functions, you must first enter the
password. The password prevents unauthorized access to the program.
The PC prompts you for a password when PC power is turned on or, if PC
power is already on, after the Programming Console has been connected to
the PC. To gain access to the system when the “Password!” message ap-
pears, press CLR and then MONTR. Then press CLR to clear the display.
If the Programming Console is connected to the PC when PC power is al-
ready on, the first display below will indicate the mode the PC was in before
the Programming Console was connected. Be sure that the PC is in PRO-
GRAM mode before you enter the password. When the password is en-
tered, the PC will shift to the mode set on the mode switch, causing PC op-
eration to begin if the mode is set to RUN or MONITOR. You can change the
mode to RUN or MONITOR with the mode switch after entering the pass-
word.
Indicates the mode set by the mode selector switch.
<PROGRAM>
PASSWORD
<PROGRAM>
4-5-2 Clearing Memory
Using the Memory Clear operation it is possible to clear all or part of the Pro-
gram Memory, and the IR, HR, DM and TC areas. Unless otherwise speci-
fied, the clear operation will clear all memory areas above provided that the
Memory Unit attached to the PC is a RAM Unit or an EEPROM Unit and the
write-protect switch is OFF. If the write-protect switch is ON, or the Memory
Unit is an EPROM Unit, Program Memory cannot be cleared.
Before beginning to programming for the first time or when installing a new
program, all areas should normally be cleared. Before clearing memory,
check to see if a program is already loaded that you need. If you need the
program, clear only the memory areas that you do not need, and be sure to
check the existing program with the program check key sequence before us-
ing it. The check sequence is provided later in this section. Further debug-
ging methods are provided in
Section 7 Program Debugging and Execution
.
To clear all memory areas, press CLR until all zeros are displayed and then
the top line of the following sequence. The branch lines in the sequence are
used when clearing only part of the memory areas, which is described below.
Memory can be cleared in PROGRAM mode only.
Preparation for Operation Section 4-5