Siemens Simatic CFU User Manual

Resetting using the Reset button
DANGER
Zone 22
Resetting via the reset button is not possible in zone 22 because the housing must be opened
for this purpose.
Note
Cannot be reset without BusAdapter
Resetting without the BusAdapter is not possible because startup of the CFU is prevented.
You can reset the CFU to factory settings.
Select a pin with the following dimensions for the reset (for example a paper clip):
● Diameter 0.8 mm
● Length at least 10 mm
The Reset button is located on the front of the CFU (see the following figure).
RESET
Procedure
1. Press and hold down the Reset button until the ER/MT LED begins to flash (approx. 3
seconds).
2. Release the Reset button.
The CFU is reset to factory settings and restarts.
Result
The current firmware version remains unchanged.
The following data are deleted:
● Settable I&M data
● IP address, station name, etc.
● CFU configuration (e.g. parameters set with SIMATIC PDM)
● Configuration data of the CFU for field devices (FB<n>)
The parameter assignment of the field devices remains unchanged.
Servicing and maintenance
10.14 Restoring the state of delivery
SIMATIC CFU
126 Commissioning Manual, 08/2019, A5E39252870-AD

Siemens Simatic CFU Specifications

General

Brand	Siemens
Model	Simatic CFU
Category	I/O Systems
Language	English