Rockwell Automation Publication 20D-PM001D-EN-P - March 2019 143
Troubleshooting Chapter 3
Fault/Alarm Descriptions
Table 6 - Fault/Alarm Descriptions, Actions and Configuration Parameters
No. Name Type
(1)
Description Action
1 Abs Ovespd Det 1 The motor speed has exceeded the limits set in Par
75 [Rev Speed Limit], Par
76 [Fwd Speed Limit] and Par 335 [Abs OverSpd Lim].
• Check to see if the encoder feedback polarity is
correct.
• Check to see if the drive is in torque mode (selected in
Par 110 [Speed/TorqueMode] value 2 “Torque Ref”).
If the drive is in torque mode, verify that there is a
load present.
• Verify the min/max settings in Par 75 [Rev Speed
Lim] and Par 76 [Fwd Speed Lim].
• Check to see if the load is overhauling. If it is
overhauling, turn the bus regulator off using Par
414
[Brake/Bus Cnfg] bit 2 “BusRef High”.
2 Vref Decel Fail 1 The value of Par
301 [Motor Spd Ref] has failed to decrease during a ramp to
zero speed stop.
This could possibly be due to a speed trim from Par 21
[Speed Trim 1], Par 22 [Speed Trim 2] or Par 23 [Speed
Trim 3].
3 Encoder 0 Loss 2 One of the following has occurred on encoder 0:
• missing encoder (broken wire)
• quadrature error
• phase loss
Reconnect or replace the encoder.
Configured with Par
365 [Fdbk LsCnfg Pri], Par 366 [Fdbk
LsCnfg Alt], and Par 367 [Fdbk LsCnfgPosit].
4 Encoder 1 Loss 2 One of the following has occurred on encoder 1:
• missing encoder (broken wire)
• quadrature error
• phase loss
Reconnect or replace the encoder.
Configured with Par
365 [Fdbk LsCnfg Pri], Par 366 [Fdbk
LsCnfg Alt], and Par 367 [Fdbk LsCnfgPosit].
5 Opt Port 0 Loss 2 A fault on port 0 of the Hi-Resolution Encoder feedback option card, MDI
option card, Heidenhain option card, or Resolver feedback option card has
occurred.
• Par
260 [Stegmann0 Status] displays the fault status for port 0 of the Hi-
Resolution Encoder feedback option card.
• Par 264 [Heidenhain0 Stat] displays the fault status for port 0 of the
Heidenhain feedback option card.
• Par 269 [Resolver0 Status] displays the fault status for port 0 of the
Resolver feedback option card.
• Reconnect or replace the encoder
• Reconnect the option feedback card
Configured with Par
365 [Fdbk LsCnfg Pri], Par 366 [Fdbk
LsCnfg Alt], and Par 367 [Fdbk LsCnfgPosit].
6 Opt Port 1 Loss 2 The Linear sensor portion of the MDI feedback option card has detected a fault
condition.
• Par
286 [Linear1 Status] displays the fault status for linear portion of the
MDI feedback option card.
• Reconnect or replace the encoder.
• Reconnect the feedback option card.
Configured with Par
365 [Fdbk LsCnfg Pri], Par 366 [Fdbk
LsCnfg Alt], and Par 367 [Fdbk LsCnfgPosit].
7 Params Defaulted 1 All parameters are reset to default by user. (Informational Only)
8 SLink HW Fail 1 A fault has occurred while loading the SynchLink firmware into FPGA on the
Main Control board at power up.
Replace the Main Control board.
9 SLink Comm Fail 2 A SynchLink communication fault has occurred.
• Par
902 [SL Error Status] displays SynchLink errors.
Verify the SynchLink configuration in:
• Par 904 [SL Node Cnfg]
• Par 905 [SL Rx CommFormat], and
• Par 910 [SL Tx CommFormat]
Reconnect SynchLink communication fibers.
Configured with Par
384 [SL CommLoss Cnfg].
10 Drive Power Loss 1 One of the following has occurred:
• DC Bus voltage has fallen below the minimum value.
• Par
306 [DC Bus Voltage] displays bus voltage.
• Par 330 [Fault TP Data] displays the minimum value when Par 329 [Fault TP
l] is set to five.
• The drive must first complete precharge before this check is made.
Verify AC line power.
11 Motor OLoad Trip 2 A motor overload trip has occurred. Par
308 [Output Current] is squared, scaled
and integrated over time. When this integrated value exceeds 1.0, this
exception event occurs.
The integrator's output can be viewed in Par
330 [Fault TP Data] when Par 329
[Fault TP l] is set to 13 “Mtr OL Outpt”. The overload integration rate is affected
by Par 336 [Motor OL Factor], Par 337 [Mtr I2T Curr Min], Par 338 [Mtr I2T Spd
Min] and Par 339 [Mtr I2T Calibrat].
• Reduce mechanical load
• Enter correct motor nameplate full load amps Par
2
[Motor NP FLA]
Configured with Par
371 [Mtr OL Trip Cnfg]
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