Mitsubishi MELSEC-A Series Operating Manual page 117

[Explanation]
(1)
The current value
of
a device c h n g e s according to the contents of the
sequence program being processed when the ACPU is in the RUN state.
Special registers are managed by the OS of ACPU.
When changing the current value of a special register, operate after
confirming the contents by utilizing the User's Manual of the connected
ACPU.
Pressing the [SHIFT] and [TEST] keys
in
the READ, WRLTE, INSERT,
DELETE, and MONiTOR modes (tist monitoring) enables the test opera-
tion
of
the designated device indicated by the cursor ( b ).
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