Tag: Trip Codes

Emerson Industrial Automation: Unidrive Classic HF Trip Codes

Joe Kaminski 1 Comment
Emerson Industrial Automation: Unidrive Classic HF Trip Codes
This document is pertinent to all Unidrive Classic models
MRO Electric and Supply has new and refurbished Control Techniques Unidrives  available now, along with our other Control Techniques products. Contact us about pricing for repairs. For more information, please call 800-691-8511 or email sales@mroelectric.com.
Emerson Industrial Automation: Unidrive Classic HF Trip Codes

HF81 Software Error (odd address word)

Unidrive Fault Code DiagnosticsHF81 HF82 HF83 HF84 HF85 HF86 HF87 HF88 HF89 HF90 HF91 HF92 HF93 HF94 HF95 HF96 HF97 HF98 HF99

HF82 Large Option Module Missing

HF83 Power Board Code Failure

HF84 Current Offset Trim Failure

HF85 A to D failure (ES-CC step)

HF86 Interrupt Watchdog failure

HF87 Internal ROM check error

HF88 Watchdog Failure

HF89 Unused Interrupts (nmi as source)

HF90 Stack Overflow

HF91 Stack Underflow

HF92 Software Error (undefined op code)

HF93 Software Error (protection fault)

HF94 Software Error (odd address word)

HF95 Software Error (odd address instruction)

HF96 Software Error (illegal ext bus)

HF97 Level 1 Noise

HF98 Interrupt Crash

HF99 Level 1 Crash

HF Faults are not recorded in the Drive Historical Fault Log

All of the above HF trips in BLUE are typically a result of some sort of hardware failure on the UD90A control PCB. This control board is common to all Unidrive Classics.

For the HF codes in RED refer to the following page

HF82 Large option module missing

If one of the UD7x large option modules is removed, the trip may be expected. There is an issue with either the large option module or the UD90A control PCB if this trip occurs at any other time than the case above.

HF83 Power Board Code Failure

Because the UD90A control PCB was unable to recognize the power rating of the power PCB it is connected to, this trip occurred.

The trip is likely due to the power PCB in the Drive or a problem with the UD90A control PCB on Unidrive Sizes 1 to 4 (which includes UNI1401, UNI1402, UNI1403, UNI1404, UNI1405, UNI2401, UNI2402, UNI2403, UNI3401, UNI3402, UNI3403, UNI3404, UINI3405, UNI4401, UNI4402, UNI4403, and UNI4404).

UD99 PCB or the UD90A PCB cause the trip on a Unidrive Size 5. The interconnects between the PCBs should also be checked, as they could also cause a trip.

HF84 Current Offset Trim Failure

Due to an issue with the current feedback on the drive, this trip occurs. The trip is likely due to the power PCB in the Drive on Unidrive Sizes 1 to 4. An issue with the UD90A control PCB may also cause this trip.

The UD99 PCB or the UD90A PCB cause the trip on a Unidrive Size 5, along with the interconnects between the PCBs.

HF88 Watchdog Failure

This trip can result from a faulty UD7x Co-Processor. With power off, remove Co-Processor and re-apply power.

HF82 Large option module missing

If one of the UD7x larger option modules is removed while the Drive is powered up, this trip is likely to occur. There is an issue with either the UD90A control PCB or the large option module if this trip were to occur at any other time.

HF83 Power Board Code Failure

The UD90A control PCB was unable to recognize the power rating of the power PCB it is connected to, which is what caused the trip.

The trip is likely due to the power PCB in the Drive on Unidrive Sizes 1 to 4, however, an issue with the UD90A control PCB is also able to cause this trip.

The trip is caused by the UD90A PCB, the UD99 PCB, or the interconnects between the PCBs on a Unidrive Size 5.

HF84 Current Offset Trim Failure

If there is an issue with the current feedback on the Drive, this trip will occur. The trip is likely due to the power PCB in the Drive, but an issue with the UD90A control PCB could also result in a trip on Unidrive Sizes 1 to 4.

On a Unidrive Size 5, the trip is cause by either UD99 PCB or the UD90A PCB. The interconnects between the PCBs could also cause this trip and should be checked.

A trip could be caused by either UD99 PCB, UD90A PCB, or the interconnects between the PCBs on a Unidrive Size 5.

HF88 Watchdog Failure

A faulty UD7x Co-Processor and large option module, ( includes UD70, UD71, UD73, UD74, UD75, and UD76) can cause this trip. Remove Co-Processor and re-apply power with power off.

Unidrive Fault Code DiagnosticsHF81 HF82 HF83 HF84 HF85 HF86 HF87 HF88 HF89 HF90 HF91 HF92 HF93 HF94 HF95 HF96 HF97 HF98 HF99

Control Techniques Commander SE HF Trip Codes

Joe Kaminski 10 Comments
Commander SE
Commander SE

The Control Techniques Commander SE Microdrive series is an AC open loop vector that provides great flexibility as well as a small footprint.  Although this series is reliable you may encounter one of the HF Trip codes listed below.  These codes are a result of an internal error in the drive.  Most often these trip codes can be resolved by powering down and allowing the drive sit for 5 minutes before powering up again.

If the HF Fault code does not clear then your drive will likely require a repair.

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Emerson Commander SK Advanced User Guide & Manual

Joe Kaminski 49 Comments

Struggling with troubleshooting and repair? Keep your equipment running smoothly by using the following guide to diagnose any trip codes. The following are some of the common errors you might encounter:

Emerson Commander SK Fault & Trip Codes by Control Techniques

Trip Code Condition Possible Cause
UU DC Bus under voltage Low AC Supply Voltage

Low DC Bus voltage when supplied by an external DC power supply
OU DC Bus over voltage Deceleration rate set too fast for the inertia of the machine

Mechanical load driving the motor
OI.AC** Drive output instantaneous over current Insufficient ramp times

Phase to phase or phase to ground short circuit on the drives output

Drive requires autotuning to the motor

Motor or motor connections changed, re-autotune drive to motor
OI.br** Braking Resistor instantaneous over current Excessive current in braking resistor

Braking resistor value to small
O.SPd Over Speed Excessive motor speed (typically caused by a mechanical load driving the motor
tunE Autotune stopped before completion Run command removed before autotune compelte
It.br I2t on Braking Resistor Excessive braking resistor energy
lt.AC l2t on drive output current Excessive Mechanical load

High impedance phase to phase or phase to ground short circuit at drive output

Drive requires re-autotuning to motor
O.ht1 IGBT over heat based on dries thermal model Over heat software thermal module
O.ht2 Over heat based on drives heatsink Heatsink temperature exceeds maximum allowable
th Motor thermistor trip Excessive motor temperature
O.Ld1* User +24v or digital output overload Excessive load or short circuit on +24v output
cL1 Analogue input 1 current mode, current loss Input current less than 3mA when 4-20 or 20-4mA modes selected
SCL Serial communication loss time-out Loss of communication when drive is under remote control
EEF Internal Drive EEPROM trip Possible loss of parameter values
PH Input phase imbalance or input phase loss One of the input phases has become disconnected from the drive (applies to 200/400v three phase drives only, not dual rated drives.
rS Failure to measure motors stator resistance Motor too small for drive

Motor cable disconnected during measurement
C.Err SmartStick data error Bad connection or memory corrupt within SmartStick
C.dAt SmartStick data does not exist New/empty SmartStick being read
C.Acc SmartStick read/write error fail Bad connection or faulty SmartStick
C.rtg SmartStick/drive rating change Already programmed SmartStick read by a drive of a different rating
O.cL Overload on current loop input Input current exceeds 25mA
HFxx trip Hardware faults Internal drive hardware fault

HF01 to HF03
Not used
HF04
Low DC bus at power up- may indicate an AC Input or pre-charge problem
HF05
No internal handshake signal from second processor (DSP) at start up
HF06
Unexpected interrupt
HF07
Watchdog failure
HF08
Interrupt crash (code overrun)
HF09 to HF10
Not used
HF11
Access to the EEPROM failed- tried to read stored parameter data but failed
HF12 to HF19
Not used
HF20
Power stage – code error Tried to read power board and read back erroneous
HF21
Power stage – unrecognized frame size
HF22
Overcurrent detection at power up- possible output short or bridge failure
HF23
DSP software overrun
HF24
Not Used
HF25
DSP Communications failure- communication from main to 2nd processor
HF26
Soft start relay failed to close; or soft start monitor failed; or braking
IGBT short circuit at power up
HF27
Power stage thermistor fault
HF28
Power circuit thermistor 2 or 3 fault Internal fan fault on size 3 only
HF29
Fan failure (current too high – only on drives with a fan) see note below
HF30
Not used
HF31
Internal Cap Bank Fan failure- check for fan rotation/blockage Size 4 and up
HF32
Power circuit temperature feedback multiplexer failure

Looking for more information about Control Techniques equipment? Read on here. 

Shopping for new or refurbished Control Techniques parts? Shop for the parts you’re looking for here, or find out more about how MRO Electric can help you repair your equipment. 

Experiencing Trip Codes on Your Commander SK?

Trip codes can be puzzling, but MRO Electric has the solution. Whether you need in-depth guides to understand your Commander SK drive’s codes or require immediate repair service, we’re here to support you in restoring your system’s efficiency swiftly.

Explore Our Control Techniques Repair Services
Shop New or Refurbished Control Techniques Parts

Unidrive SP SM-EZ Motion HF Trips

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Unidrive SP SM-EZ Motion HF Trips

This guide is meant to help clear SM-EZ Motion HF Trips on a Unidrive SP drive from Emerson Control Techniques. The SM-EZ motion module is used with SP drives and is programmed using Power Tools Pro. It allows users to create specific motion profiles such as indexing, home routines, electronic gearing, and many others.

An HF (hardware fault) can be generated by the drive if there is a problem with the solutions module. The drive will display the trip as SLX.HF. It is sometimes possible to correct this trip without replacing the module. The EZ Motion program in the module may become corrupt which can cause this type of trip. Clearing the program and setting the module back to factory settings may resolve the trip. Before clearing the module a drive reset and power cycle should be performed.

They could correct the trip as well.

unidrive sp
Module Clearing Procedure

1. Ensure the module is installed in any slot

2. Enter 19237 at #18.01

3. Cycle power to the drive

4. The drive will trip SLX.ER on power up. This is a 107 “No Program” trip

5. Press the red reset button to clear the SLX.ER trip

6. Reload your EZ Motion program back into the drive.

The HF trip could be resolved at this point.

MRO Electric supplies and repairs a large number of Control Techniques Unidrive SP parts. To request a quote, please call 800-691-8511 or email sales@mroelectric.com.

Unidrive Classic Option Module Trip Codes

Joe Kaminski 1 Comment

unidrive

Unidrive Classic Option Module Trip Codes

On Unidrive Classics, when a UD7x Unidrive option module error trip occurs,
the display will show the trip code as “tr__”. The trip number
can also be read in Unidrive parameter #10.20 or UD70
virtual parameter #88.01, and the line number where the trip
occurs in parameter #17.03, though only if the program was
compiled with debugging information.

When an error occurs in the UD70, the DPL program will
immediately stop. Also, depending on the cause of the trip
and the setting of the Trip enable parameters, the Unidrive will
trip on the “tr__” code. Optionally, an ERROR task may have
been defined which would be executed whenever a run-time
error occurs. MRO Electric and Supply maintains a comprehensive stock of new and used  Control Techniques Unidrive and Control Techniques Unidrive Classic SP parts. If you need a replacement part, please call 800-691-8511 or email sales@mroelectric.com.

Code Description Action
40 Unknown error Always trips
41 Parameter does not exist Trips if #17.14=1
42 Parameter read only Trips if #17.14=1
43 Parameter write only Trips if #17.14=1
44 Parameter value over range Trips if #17.14=1and #17.17=1
45 Virtual access failed – e.g. IOLink not running Trips if #17.14=1 (access)and
#17.15=1* (all time)
46 Stack Overflow Always trips
47 Internal error Always trips
48 Internal error Always trips
49 The wrong system loaded Always trips
50 DPL Maths fault – e.g. divide by zero, overflow etc Trips if #17.14=1
51 DPL array index out of range Trips if #17.14=1
52 User-generated trip from control word Always trips *
53 DPL Program incompatible Always trips
54 DPL Overload – Clock tick too short Trips if #17.14=1
55 RS485 trip – Mode 3 Trips if #17.14=1
56 Option board and system incompatible Always trips
57 Illegal OSCall Always trips
58-59 Internal Error Trips if #17.14=1
60-69 Option generated trip Trips if #17.14=1 *
Prc2 *Watchdog Trip.See the DPL command WDOG for information
Note: The watchdog trip can be disabled by setting #17.18 to 0.
CTTG128.doc V1.0 2 04/12/05

Important Notes:
*When a trip occurs, all tasks of the DPL program will be halted (real-time tasks will
first complete) and any ERROR task is executed. The only exception to this is with trip 45, trip
52, trip 60 with certain option cards, the Watchdog trip (Prc2) and any other normal drive trips.
Other Notes
The line number is only available when the program was compiled with debugging information.
Any other trip numbers that appear are either generated by the drive itself or the DPL program.

Lastly, be sure to check out our article covering Unidrive Security Code Basics here.

Unidrive Classic

Unidrive Classic HF Trip Codes: HF82, HF83, HF84, HF88

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unidrive classic

Unidrive Classic HF Trip Codes: HF82, HF83, HF84, HF88

HF82 – Large option module missing:
The trip would be expected if one of the UD7x large option modules is removed while
the Drive is powered up. If this trip occurs at any other time than the case above, then
there is a problem with either the large option module or the UD90A control PCB.

HF83 – Power Board Code Failure:
This trip means that the UD90A control PCB could not recognize the power rating of
the power PCB it is connected to.
On Unidrive Sizes 1 to 4, the trip is probably due to the power PCB in the Drive but a
problem with the UD90A control PCB could also cause this trip.
On a Unidrive Size 5 the trip is caused by either UD99 PCB or the UD90A PCB. The
interconnects between the PCBs could also cause this trip and should be checked.

HF84 -Current Offset Trim Failure:
This trip means there is a problem with the current feedback on the Drive.
On Unidrive Sizes 1 to 4, the trip is probably due to the power PCB in the Drive but a
problem with the UD90A control PCB could also cause this trip.
On a Unidrive Size 5 the trip is cause by either UD99 PCB or the UD90A PCB. The
interconnects between the PCBs could also cause this trip and should be checked.

HF88 – Watchdog Failure:
This trip can result from a faulty UD7x Co-Processor.
With power off, remove Co-Processor and re-apply
power.
Hardware Faults are typically fatal. If powering down and letting the drive sit for 5
minutes before re-application of Power does not clear the HF Fault it would require
Drive repair.

MRO Electric stocks new and refurbished Classic Unidrives. We also provide pre-priced Control Techniques repairs. For more information or to request a quote, please call 800-691-8511 or email sales@mroelectric.com.
Unidrive Classic

Troubleshooting a Unidrive with Hardware Fault Trip Codes

Joe Kaminski 10 Comments

unidrive trip codes

Troubleshooting a Unidrive with Hardware Fault Trip Codes

Unidrive Classics are going to trip at one time or another. Refer to this list of Unidrive trip codes next time your Uni1405 or other Unidrive is throwing a mysterious trip error.

HF81 – Software Error (odd address word)
HF82 – Large option module removed
HF83 – Power Board Code Failure
HF84 – Current Offset Trim Failure
HF85 – A to D failure (ES-CC step)
HF86 – Interrupt Watchdog failure
HF87 – Internal ROM check error
HF88 – Watchdog Failure
HF89 – Unused Interrupts (nmi as source)
HF90 – Stack Overflow
HF91 – Stack Underflow
HF92 – Software Error (undefined op code)
HF93 – Software Error (protection fault)
HF94 – Software Error (odd address word)
HF95 – Software Error (odd address inst.)
HF96 – Software Error (illegal ext bus)
HF97 – Level 1 Noise
HF98 – Interrupt Crash
HF99 – Level 1 Crash

A few notes on these Unidrive trip codes:

  • HF trips are internal hardware faults within the drive. Powering the drive down and re-applying power could clear the fault.
  • Resetting the drive will not clear a HF trip.
  • If a HF trip occurs, the Drive Healthy relay will open to indicate this
  • The serial communications will not function during a HF trip
  • The only HF trip that can be caused by the user is a HF82 trip where a
    large option module is removed while the drive is powered up.The drive should be powered down, the module re-fitted correctly and the power reapplied to clear the trip

MRO Electric and Supply has new and refurbished Control Techniques, parts available including the Control Techniques Unidrive Classic and Control Techniques Unidrive SP series. We also offer repair pricing. For more information, please call 800-691-8511 or email sales@mroelectric.com.