Fieldbuses A-51
AC30 series Variable Speed Inverter
Lost Communications Trip
A trip may be issued by the inverter on the loss of connection to the PLC. To enable this, set the parameter 3133 PROFINET Trip to ENABLED
and set the FIELDBUS BREAK bit in the parameter 0730 ENABLE 33 – 64.
With the motor running, the trip will occur when the parameter 3143 PROFINET State transitions from the CONNECTED state to any other state.
Troubleshooting and Tips
Inverter fails to come out of configuration mode
• Check the parameter 3144 PROFINET Diagnostic for INPUT MAPPING FAILED or OUTPUT MAPPING FAILED. See Parameter Mapping
section.
Inverter fails to come out of Waiting for Connection PROFINET state
• Check that the Station Name has been set. See Station Name section.
• Make sure the Update Time is set to an appropriate rate for the control mode / switching frequency. Check the parameter 3144 PROFINET
Diagnostic for CONNECTION REJECTED state. See Update Time
section.
PLC reports incorrect module
• Check the parameter 3144 PROFINET Diagnostic for MAPPING MISMATCH state. Make sure the parameter mappings on the inverter
match those of the PLC (see Parameter Mapping
section).
The inverter Input Mapping table must match the plugged Output Modules of the PLC
The inverter Output Mapping table must match the plugged Input Modules of the PLC
All Output Modules must be plugged before the Input Modules on the PLC
The inverter loses its IP address at startup
• When the IP address is set with a temporary flag using DCP, the IP address will startup as 0.0.0.0 when the inverter is power-cycled or
PROFINET is enabled. The IP address is subsequently set when the PLC next makes a connection. This behavior is part of the PROFINET
standard. However, this may be overridden by setting the parameter 3134 PROFINET Use Drive IP to TRUE so that the last IP address
used will be set at startup. See DCP Assignment
section.
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