Discrepancy Error During Enabling - Siemens Second Wind Function Manual

Operation
6.2 Typical applications
Result scenario 2: no return to the WLAN range
The "Confirm removal" dialog box is displayed on expiration of 60 seconds.
The project is closed immediately if you confirm the Confirm removal dialog within 60 seconds.
The active project is closed automatically if you do not confirm the Confirm removal dialog within 60
seconds.
The HMI device displays the Windows CE desktop with the loader.
Users can react to a fault on the HMI device by resetting the associated F_FB_MP to the "original
state" using input "S7_MP_RES." This action sets the relevant HMI device to the "removed" state and
the global rampdown signal is canceled.
The WLAN communication is set up again after the operator returns with the HMI device to
the WLAN range. The operator must restart the project and acknowledge the communication
error in the "Acknowledgment of communication error" dialog. The operator performs the
enabling button test in the next step.
The global rampdown signal is canceled.
The HMI device has recovered the fully functional state.
6.2.3.3

Discrepancy error during enabling

The enabling switch is connected to two channels. Both contacts must be closed in parallel
to reach the enabled state. A discrepancy error is generated if one of the contacts is open
while the other is closed. Distinguish between the following fault scenarios:
● The enabling switch is jammed
● The enabling switch is damaged
Enabling switch jammed
Initial situation
The HMI device is integrated in the safety program of the F CPU. The HMI device may or may not be
logged on to an effective range.
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The HMI device is integrated without being logged on to an effective range:
The HMI device is integrated and logged on to an effective range:
Fail-safe operation of the Mobile Panel 277F IWLAN
Function Manual, 08/2008, 6AV6691-1FQ01-2AB0