Fallback And Recovery; Backing Up Remanent Data; Real-Time Clock - Bosch Rexroth IndraControl XM42 Operating Instructions Manual

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Device description
If it is not booted in this sequence, an error is present (see
13 "Error causes and troubleshooting" on page

12.5 Fallback and recovery

The hardware is initialized after switching on the control and after installing the
system firmware with subsequent reboot. Internally programmable function
blocks are loaded. These also include internally programmed function blocks of
connected modules. After the loading, the display LED "ON" at the voltage plug
is green.
Wait till completion. Do not switch off the control. This procedure has to be
completed.
If this display LED "ON" is red, loading for internally programmed functions
block of an extension module or of the control failed. The display LED "ON" of
the control is a collective display for all connected modules and the control.
In this case, trigger the "Fallback mode":
1. Switch off the 24 V voltage supply for the XMx control and for the exten-
sion modules.
2. Keep the "Reset" button "SF2" at the XMx control pressed and switch on
the 24 V voltage supply. If either the display LED DIA3 or DIA4 is on at the
XMx control, release the "Reset" button "SF2".
If the display LED "ON" is on at the XMx control, the error is recovered.
If the display LED "ON" is off at the XMx control, trigger the "Fallback
mode" for the extension modules, whose display LED "ON" is off.
3. Keep the "Fallback" pushbutton of the respective module pressed using a
plastic pen until the display LED "ON" is on at the extension module. This
loads a backup data set. Release the "Fallback" pushbutton. Perform this
step subsequently for all extension modules. First at those, whose display
LED "ON" was not on. After completing that for all extension modules, the
display LED "ON" of the XMxx control has to be on.
The XMx control can only start if all connected extension modules
started without any errors. If the LED "ON" of a connected extension
module is not green, initiate the "Fallback" mode for this extension
module.

12.6 Backing up remanent data

Remanent data is automatically backed up in an internal flash memory after a 24
V supply voltage failure and restored during the start.

12.7 Real-time clock

The real-time clock of the control is buffered in the switched-off state. The buf-
fer capacitor looses efficiency when operated permanently at high tempera-
Bosch Rexroth AG R911345566_Edition 03
IndraControl XM42 Controls
57).
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