40 Rockwell Automation Publication 7000-TG002J-EN-P - March 2015
Chapter 1 Fault Messages
X RPM Exceed LoLmt 608 The Follower drive motor RPM is lower than the Master drive
and the deviation exceeded the acceptable range specified by
parameter Spd Window Low (1090).
• Check the mechanical coupling and encoder. Check Gear Ratio (P934) and Spd Window
Low (P1090) for the correct settings. Check Master RPM Ref (P932) for the correct reading.
X X X SA XIO NotAssgnd 554 A required XIO card has not been assigned based on the
selection of drive model.
• This fault is related to special application drives. Verify that the parameter P833 is set
correctly (proper XIO card is assigned to the parameter).
X Self Test Flt 606 The DCSL link controller failed the power-on internal
loopback self-test.
• Cycle drive control power. If this error persists, contact the factory.
X Short STO Req 619 Short STO request fault
: The demand for the Safe Torque Off
(STO) function was not consistent across all channels. One or
more of the STO request signals to the OIBBS are de-asserted
within 1 second after being asserted.
• Verify the STO wiring and relevant components.
• Cycle the control power before attempting to reactivate the STO feature.
• If the same fault trips the drive again, contact the manufacturer for further actions.
X X X X Slave1 CurUnbal 124 The level of unbalance in the input current of the Slave1
bridge displayed in Slave1 Cur Unbal (P614) has exceeded the
value of the trip settings (P108). Verify the CTs, burden
resistors and connections on the ACB. Investigate the
incoming source voltage for unbalance.
• Verify that all CT connections are connected properly and that no wires are reversed –
Ring-out wires to verify connections.
• Check grounding on CTs.
• Ensure that all plugs are firmly connected in the ACB.
• Check that all input voltages are balanced.
• Verify Parameter settings.
• Check the burden resistors.
• Verify the Input capacitor values if installed.
• Verify that there are no open sharing resistors.
• Verify all line thyristors are firing in Gating test mode.
X X X X Slave2 CurUnbal 125 The level of unbalance in the input voltage of the Slave 2
Bridge displayed in Slave2 Cur Unbal (P615) has exceeded the
value of the trip settings (P108). Verify the CTs, burden
resistors and connections on the ACB. Investigate the
incoming source voltage for unbalance.
X X X X Slave1 Phasing 126 The drive has detected that the phasing in the Slave1 bridge is
incorrect. Verify the cables are terminated correctly.
• Verify that cables are terminated correctly.
• Verify that the feedback wires from the terminals to the VSB are terminated correctly.
• The faults can be masked, and then the voltages and phasing can be checked using the
test points on the ACB, being aware that there will be phase differences between the
master and secondary bridges depending on the drive configuration. Refer to
Commissioning chapter of the User Manual.
X X X X Slave2 Phasing 127 The drive has detected that the phasing in the Slave2 bridge is
incorrect. Verify the cables are terminated correctly.
X X X X Slave1 VoltUnbal 121 The level of unbalance in the input voltage of the Slave 1
bridge displayed in Slave1 VoltUnbal (P611) has exceeded the
value of the trip settings in (P271). This fault is valid only for
18-pulse rectifier.
• Check TSN fusing.
• Verify the VSB connections and tap settings, and check resistance of VSB board – Megger
board to confirm integrity.
• Check actual voltage values on the operator interface terminal for each bridge and the
total line voltage.
• Check for possible source voltage supply problems.
• Use a multimeter and oscilloscope to check voltages on the drive voltage test points.
X X X X Slave2 VoltUnbal 122 The level of unbalance in the input voltage of the Slave 2
Bridge displayed in Slave2 VoltUnbal (P610) has exceeded the
value of the trip settings in (P271). This fault is valid only for
18-pulse rectifier.
X X X Sp App Card Loss 466 The drive failed to read the data from the special application
XIO card.
• Check the healthy status of the card. Also verify the status of input 15.
X STO Gating Flt 620 STO Gating Fault
: The drive was unable to perform a
controlled shutdown in the allotted time after an STO request,
or there is a hardware compatibility problem with the STO
hardware and the drive parameter settings.
• Verify the drive settings.
• Cycle the control power before attempting to reactivate the STO feature.
• If the same fault trips the drive again, contact the manufacturer for further actions.
All Drive Types
PF7000A
PF7000B
PF7000C
Marine Drive
Heat pipe Drive
Fault Message Fault Code Description Recommended Action(s)
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