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4-5-2 PC Modes
The Programming Console is equipped with a switch to control the PC mode. To
select one of the three operating modes—RUN, MONITOR, or PROGRAM—
use the mode switch. The mode that you select will determine PC operation as
well as the procedures that are possible from the Programming Console.
RUN mode is the mode used for normal program execution. When the switch is
set to RUN and the START input on the CPU Power Supply Unit is ON, the CPU
Unit will begin executing the program according to the program written in its Pro-
gram Memory. Although monitoring PC operation from the Programming Con-
sole is possible in RUN mode, no data in any of the memory areas can be input or
changed.
MONITOR mode allows you to visually monitor in-progress program execution
while controlling I/O status, changing PV (present values) or SV (set values),
etc. In MONITOR mode, I/O processing is handled in the same way as in RUN
mode. MONITOR mode is generally used for trial system operation and final pro-
gram adjustments.
In PROGRAM mode, the PC does not execute the program. PROGRAM mode
is for creating and changing programs, clearing memory areas, and registering
and changing the I/O table. A special Debug operation is also available within
PROGRAM mode that enables checking a program for correct execution before
trial operation of the system.
Caution Do not leave the Programming Console connected to the PC by an extension
cable when in RUN mode. Noise picked up by the extension cable can enter the
PC, affecting the program and thus the controlled system.
4-5-3 The Display Message Switch
Pin 3 of the CPU Unit’s DIP switch determines whether Japanese or English lan-
guage messages will be displayed on the Programming Console. It is factory set
to ON, which causes English language messages to be displayed.
4-6 Preparation for Operation
This section describes the procedures required to begin Programming Console
operation. These include password entry, clearing memory, error message
clearing, and I/O table operations. I/O table operations are also necessary at
other times, e.g., when changes are to be made in Units used in the PC configu-
ration.
Caution Always confirm that the Programming Console is in PROGRAM mode when
turning on the PC with a Programming Console connected unless another mode
is desired for a specific purpose. If the Programming Console is in RUN mode
when PC power is turned on, any program in Program Memory will be executed,
possibly causing a PC-controlled system to begin operation.
The following sequence of operations must be performed before beginning ini-
tial program input.
1, 2, 3... 1. Insert the mode key into the Programming Console.
2. Set the mode switch to PROGRAM mode. (The mode key cannot be re-
moved while set to PROGRAM mode.)
3. Turn ON PC power.
Note When I/O Units are installed, turn on those Units also. The Program-
ming Console will not operate if these Units are not turned ON.
Preparation for Operation Section 4-6