Operating Mode Switch - WAGO 750 Series Manual

42 • Fieldbus Controller 750-841
Hardware

3.1.3.6 Operating Mode Switch

The operating mode switch is located behind a cover flap.
Fig. 3-4: Operating Mode Switch
The switch is a push/slide switch with 3 settings and a hold-to-run function.
The slide switch is designed for a maximum number of switching cycles as
defined in EN61131T2.
Operating mode switch
From middle to top position
From top to middle position
Lower position, bootstrap
Push down
(i.e. with a screwdriver)
An operating mode (i.e., RUN/STOP) is internally changed at the end of a
PLC cycle.
Note
The position of the mode switch is not important when starting or stopping
the PFC application from WAGO-I/O-PRO.
RUN STOP
RESET
(pushing down)
UPDATE FIRMWARE
Mode switch
Function
Firmware and PFC application are executed (Activate
program processing (RUN)
Firmware is executed, PFC application is stopped (Stop
program processing (STOP)
Controller starts the operating system loader
Hardware reset
All outputs and flags are reset; variables are set to 0 or to
FALSE or to an initial value.
Retain variables or flags are not changed.
The hardware reset can be performed with STOP as well
as RUN in any position of the operating mode switch!
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