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Programming Console Function Section 6-12
Key Operations Mode Selection Keys, Mode Lock Key
The display element on the Programming Console screen shown below com-
prises the mode selection keys, which change the operation mode of the PLC,
and the mode lock key, which prevents unintended mode changes.
The RUN, MONITOR, and PROGRAM mode selection key elements are
touch switches and pressing them causes the PLC operation mode to change
(unlike an actual Programming Console, it is possible to switch directly
between the RUN mode and the PROGRAM mode.)
When the Programming Console function is started, the PLC operation status
is read and reflected at the PLC.
The mode lock key element is also a touch switch, and it alternates between
the lock ON (with no key displayed) and lock OFF (with key displayed) states
when pressed. During the lock ON state, mode selection key operations are
ineffective. The mode displays change as indicated in the figures below during
the lock ON status and during the lock OFF status.
When the Programming Console function starts, the lock ON status is estab-
lished.
If the RUN, MONITOR, or PROGRAM mode selection key is pressed in the
lock OFF status, the mode changes and the lock ON status is established.
During Lock OFF
During Lock ON
Programming Console Keyboard
The Programming Console keyboard used on the screen when the Program-
ming Console function is used is comprised entirely of touch switches (shown
by the dashed line frames in the figure below). On pressing a touch switch, a
key operation is executed. However, since there is a discrepancy between the
size of the displayed keys and the size of the touch switches, take care to
press as close to the center of the key as possible by referring to the figure
below.
Mode selection keys
Mode lock key
RUN mode MONITOR mode PROGRAM mode
MONITOR mode PROGRAM modeRUN mode
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