Functional characteristics
Access control
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099-00T401-EW501
01.02.2022
5.5 Access control
The machine control can be locked to secure it against unauthorised or unintentional adjustment. The
access block has the following effect:
• The parameters and their settings in the machine configuration menu, Expert menu and operation se-
quence can only be viewed but not changed.
• Welding procedure and welding current polarity cannot be changed.
The parameters for setting the access block are configured in the machine configuration
menu
> see 5.7 chapter
.
Enabling access block
• Assign the access code for the access block: Select parameter
and select a number code (0–
999).
• Enable access block: Set parameter
to access block enabled
.
The access block activation is indicated by the "Access block active" signal light
> see 4 chapter
.
Disabling access block
• Enter the access code for the access block: Select parameter
and enter the previously selected
number code (0–999).
• Disable access block: Set parameter
to access block disabled
. The only way to disable the
access block is to enter the selected number code.
5.6 Voltage reducing device
Only machine variants with the (VRD/SVRD/AUS/RU) code are equipped with a voltage reduction device
(VRD). The VRD is used for increased safety, especially in hazardous environments such as shipbuilding,
pipe construction or mining.
A VRD is mandatory in some countries and required by many on-site safety instructions for power
sources.
The VRD
> see 4 chapter
signal light is illuminated when the voltage reduction device is operating without
fault and the output voltage is reduced to a value specified in the relevant standard (see technical data).