SEW-Eurodrive DFE32B PROFINET IO Manual page 124

Error Diagnostics
10
Diagnostics procedures
124
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.
Check that the correct settings have been made for the following drive parame-
ters:
• P100 SETPOINT SOURCE
• P101 CONTROL SIGNAL SOURCE
• P876 ENABLE PO DATA
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.
↓
↓
↓
Setpoints received?
No
↓
FIELDBUS
FIELDBUS
YES
↓
Settings OK?
Yes
↓
↓
Manual – DFE32B Fieldbus Interface PROFINET IO
Yes → [A]
No → [B]