Siemens SIMOTION D4 5-2 Series Commissioning And Hardware Installation Manual page 109

Fan faults are detected if through
● A cyclic fan test
● Or when the fan is switched on
a malfunction is detected (fan does not turn or fan turns at too low a speed).
Note
If the "redundant fan" is already defective in a double fan/battery module when the system is
powered-up, this is detected as a single fan/battery module depending on the type of defect
(e.g. a wire breakage).
You should, therefore, also set the .fanexisting system variable to the "SINGLE" state to alert
the personnel operating the machine to the fact that no is redundancy available.
Diagnostics buffer entry
The diagnostics buffer entries have the following meanings:
● Fan on the module is defective
● There is no redundant fan available
Requirement/availability of a fan
System variables can be used to evaluate:
● Whether a fan is required for the operation of the device (or not)
● Whether a fan is available (or not)
SIMOTION D4x5-2
Commissioning and Hardware Installation Manual, 02/2012
All of the fans in a fan/battery module have failed
This message only occurs in the case of modules that support double fan/battery
modules with a redundant fan.
The message occurs:
– If it is only the redundant fan that has failed on a double fan/battery module or
– If a single fan/battery module is connected but the module also supports a double
fan/battery module in principle (this is only the case for D445-1; with D4x5-2, only
double fan/battery modules are permitted)
Commissioning (hardware)
4.4 Fan
109