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Manual – DFE32B Fieldbus Interface PROFINET IO
10
Diagnostics procedures
Error Diagnostics
Diagnostic problem 2:
Inverter cannot be controlled via the IO controller
Initial status:
• Bus communication with inverter OK (LED BUS FAULT off)
• Inverter running with 24 V (no supply voltage)
↓
The problem is either caused by incorrect parameterization in the inverter or a
faulty control program in the PROFINET IO controller.
↓
Use P094 ... P097 (setpoint description PO1 ... PO3) to check whether the set-
points sent by the controller are received correctly.
To do so, send a setpoint other than 0 as a test in each output word.
↓
Setpoints received? Yes → [A]
No
↓
Check that the correct settings have been made for the following drive parame-
ters:
• P100 SETPOINT SOURCE FIELDBUS
• P101 CONTROL SIGNAL SOURCE FIELDBUS
• P876 ENABLE PO DATA YES
↓
Settings OK? No → [B]
Yes
↓
The problem may be caused by your control program in the IO controller.
↓
Check that the address used in the program is the same as the address for proj-
ect planning.
Note that the inverter requires consistent data and access must take place
within the control program, if necessary, via special system functions (for exam-
ple, SIMATIC S7, SFC 14/15).
[A] Setpoints are transferred.
Check whether the drive inverter has been enabled at the terminals.
[B] Correct settings.
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