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Explanations of PLC Setup Settings Section 7-2
Note If the backup battery fails or is disconnected, the Forced Status Hold Bit will
be cleared whether this setting is ON or OFF.
Startup Mode Setting This setting determines whether the startup mode will be the mode set on the
Programming Console’s mode switch or the mode set here in the PLC Setup.
Note If this setting specifies the mode set on the Programming Console’s mode
switch (0) but a Programming Console isn’t connected, the CPU Unit will auto-
matically enter RUN mode at startup. (This differs from the default operation
for CS-series CPU Units.)
OFF (0): Forced Status Hold Bit cleared at start-up
Power
OFF
Power
OFF
Power
ON
Power
ON
Forced bit status
Forced bit status
Forced Status
Hold Bit: 1 (ON)
Forced Status
Hold Bit: 0 (OFF)
Not retained
when power is
turned ON.
ON (1): Forced Status Hold Bit protected at start-up
Forced bit status
Forced bit status
Mode switch Retained
Power ON
Retained
Power ON
Not retained
Retained when
power is turned
ON.
Mode switch Retained
Forced Status
Hold Bit: 1 (ON)
Forced Status
Hold Bit: 1 (ON)
RUN mode when
disconnected.
PRCN: Programming Console's mode switch
Other: PC Setup's Startup Mode setting
Mode switch
setting
Power ON
Power ON
Power ON
PRG: PROGRAM mode
MON: MONITOR mode
RUN: RUN mode