Control TechniquesFault codes
Digitax ST fault codes
Every trip a Control Techniques Digitax ST can display, listed by the trip number in parameter 10.20, with the meaning taken from the Digitax ST Technical Data Guide. Servo and Solutions Module trips make up most of the list.
Digitax ST trip table
Listed by the trip number shown in parameter 10.20 and in the trip log. Numbers 14, 22, 23, 100, 102, 110, 111, 195, 203 and 204 are not used by the drive, so they do not appear here.
| Trip no. | Display | Meaning |
|---|---|---|
| Main drive trips | ||
| 1 | UV | DC bus under voltage threshold reached — low AC supply, or a low DC bus when the drive is running from an external DC supply |
| 2 | OV | DC bus voltage has exceeded the peak level or the maximum continuous level — usually regenerative energy during a fast deceleration |
| 3 | OI.AC | Instantaneous output over current detected — short circuit at the drive output, ramp times too short, or an autotune needed after a motor change |
| 4 | OI.br | Braking transistor over current — the short circuit protection in the braking IGBT has operated. Check the braking resistor value and wiring |
| 5 | PS | Internal power supply fault — hardware fault in the drive power supply |
| 6 | Et | External trip from the input on terminal 31 — a digital input set as external trip has opened |
| 7 | O.SPd | Motor speed has exceeded the over speed threshold |
| 8 | PS.10V | 10 V user power supply current greater than 10 mA — too much load on the 10 V reference |
| 9 | PS.24V | 24 V internal power supply overload |
| 10 | br.th | Braking resistor thermistor temperature monitoring fail. With no braking resistor fitted, set Pr 0.51 (or Pr 10.37) to 8 to disable the trip |
| 11 | tunE1 | The position feedback did not change, or the required speed could not be reached, during the inertia test (Pr 5.12) — check that the brake is released and the feedback wiring and settings are correct |
| 12 | tunE2 | Position feedback direction incorrect, or the motor could not be stopped, during the inertia test |
| 13 | tunE3 | Drive encoder commutation signals connected incorrectly, or the measured inertia is out of range |
| 15 | tunE5 | Drive encoder V commutation signal fail during an autotune — check the V phase commutation wiring, or replace the encoder |
| 16 | tunE6 | Drive encoder W commutation signal fail during an autotune |
| 17 | tunE7 | Motor number of poles set incorrectly — check the lines per revolution of the feedback device and the poles in Pr 5.11 |
| 18 | tunE | Autotune stopped before completion — the drive tripped during autotune, the red stop key was pressed, or the SAFE TORQUE OFF input opened |
| 19 | It.br | Braking resistor overload timed out (I²t) — more braking energy than the resistor fitted can absorb. The accumulator value is in Pr 10.39 |
| 20 | It.AC | Output current overload timed out (I²t) — too much mechanical load, or a high impedance short on the drive output |
| 21 | O.ht1 | Power device over temperature based on the thermal model |
| 24 | th | Motor thermistor trip — motor over temperature, or a break in the thermistor circuit |
| 25 | thS | Motor thermistor short circuit |
| 26 | O.Ld1 | Digital output overload — total current drawn from the 24 V supply and the digital outputs exceeds 200 mA. Check the load on terminals 24, 25, 26 and the +24 V rail |
| 27 | O.ht3 | Drive over temperature based on the thermal model, which uses DC bus ripple as well as output current to protect the DC bus stage |
| 28 | cL2 | Analogue input 2 current loss (current mode) — check the 4-20 mA signal on terminal 7 |
| 29 | cL3 | Analogue input 3 current loss (current mode) — check the 4-20 mA signal on terminal 8 |
| 30 | SCL | Drive RS485 serial comms loss to the remote keypad |
| 31 | EEF | EEPROM data corrupted — the drive goes into open loop and the RS485 port times out with a remote keypad fitted. Cleared only by loading defaults and saving parameters |
| 32 | PH | AC input phase loss, or a large supply imbalance, detected from DC bus ripple |
| 33 | rS | Stator resistance measurement failed — no motor connected, a phase disconnected, or a motor too small for the drive |
| 34 | PAd | Keypad removed while the drive is receiving its speed reference from the keypad |
| 35 | CL.bit | Trip initiated from the control word (Pr 6.42) |
| 36 | SAVE.Er | User save parameters in the EEPROM are corrupt |
| 37 | PSAVE.Er | Power-down save parameters in the EEPROM are corrupt |
| 38 | t038 | User trip defined in the 2nd processor Solutions Module code |
| 39 | L.SYnC | Drive failed to synchronise to the supply voltage in regen mode |
| User and onboard PLC trips | ||
| 40 – 89 | t040 – t089 | User trips raised by a Solutions Module 2nd processor program |
| 90 | UP div0 | Onboard PLC program attempted to divide by zero |
| 91 | UP PAr | Onboard PLC program attempted to access a parameter that does not exist |
| 92 | UP ro | Onboard PLC program attempted to write to a read-only parameter |
| 93 | UP So | Onboard PLC program attempted to read a write-only parameter |
| 94 | UP ovr | Onboard PLC program attempted an out of range parameter write |
| 95 | UP OFL | Onboard PLC variables and function block calls are using more than the allowed RAM — stack overflow |
| 96 | UP uSEr | Onboard PLC program requested a trip |
| 97 | UP udF | Onboard PLC program raised an undefined trip |
| 98 | UP ACC | Cannot access the onboard PLC program file on the drive — write access is not allowed while the drive is enabled, or another source is using the file |
| 99 | t099 | User trip raised by a Solutions Module 2nd processor program |
| 101 | t101 | User trip raised by a Solutions Module 2nd processor program |
| 103 – 109 | OIbr.P – OIdC.P | Power module versions of the braking, output over current, heatsink, DC bus over voltage, phase loss, power supply and DC over current trips. The guide lists the codes and numbers only |
| 112 – 160 | t112 – t160 | User trips raised by a Solutions Module 2nd processor program |
| Encoder trips | ||
| 161 – 167 | Enc11 – Enc17 | Encoder set-up trips: alignment failure, Hiperface type not recognised, EnDat turns or comms bits incorrect, periods per revolution calculated from the nameplate do not match the encoder, and periods obtained during auto-configuration do not match |
| 168 – 174 | t168 – t174 | User trips raised by a Solutions Module 2nd processor program |
| SMARTCARD trips | ||
| 175 | C.Prod | SMARTCARD trip: the data blocks on the card are not compatible with this product — set Pr xx.00 to 9999 and press the red reset button to erase the card |
| 176 | EnP.Er | Data error from the electronic nameplate stored in the selected position feedback device |
| 177 | C.boot | SMARTCARD trip: a menu 0 parameter change cannot be saved because the required file has not been created on the card — check Pr 11.42 and reset the drive |
| 178 | C.bUSY | SMARTCARD trip: the card cannot perform the function because a Solutions Module is accessing it — wait and retry |
| 179 | C.Chg | SMARTCARD trip: the data location already contains data — erase it or use another location |
| 180 | C.OPtn | SMARTCARD trip: the Solutions Modules fitted in the source and destination drives are different |
| 181 | C.RdO | SMARTCARD trip: the card has the read only bit set — enter 9777 in Pr xx.00 to allow read/write access |
| 182 | C.Err | SMARTCARD trip: the data on the card is corrupted — check the card is located correctly, erase and retry, or replace it |
| 183 | C.dAt | SMARTCARD trip: the data location specified does not contain any data — check the data block number |
| 184 | C.FULL | SMARTCARD trip: the card is full — delete a data block or use another card |
| 185 | C.Acc | SMARTCARD trip: read/write fail — the drive cannot communicate with the card. Check it is installed correctly, that nothing is writing to data locations 500 to 999, and replace the card if needed |
| 186 | C.rtg | SMARTCARD trip: the voltage or current rating of the source and destination drives are different, so rating dependent parameters were not transferred |
| 187 | C.TyP | SMARTCARD trip: the parameter set on the card is not compatible with the drive type |
| 188 | C.cPr | SMARTCARD trip: the values stored in the drive and the values in the data block on the card are different — press the red reset button to continue |
| 189 – 194 | Enc1 – Enc6 | Drive encoder trips: power supply overload, wire break on the encoder terminals, phase offset incorrect while running, feedback device comms failure, checksum or CRC error, and an error reported by the encoder |
| 196 – 198 | Enc8 – Enc10 | Encoder trips: auto configuration on power up requested but not completed, position feedback selected from a Solutions Module slot with no feedback module fitted, and servo mode phasing failure because the encoder phase angle is incorrect |
| 199 | DESt | Two or more parameters are writing to the same destination parameter — set Pr xx.00 to 12001 and check the menus for duplication |
| Solutions Module trips | ||
| 200 – 215 | SL1.HF – SL.rtd | Solutions Module trips for slots 1 to 3: module hardware fault, watchdog time out, an error detected by the module, module not fitted, and module type changed since parameters were saved. SL.rtd means the drive mode has changed and the module parameter routing is now incorrect — press reset, and contact the supplier if it persists |
| 216 | t216 | User trip raised by a Solutions Module 2nd processor program |
| Hardware trips | ||
| 217 – 232 | HF17 – HF32 | Hardware trips: multi-module thermistor and interconnect faults, temperature feedback multiplexing, power stage recognition and frame or voltage rating mismatches, current feedback offset error, soft start relay failure, and power stage or control board thermistor faults. Hardware fault — return the drive to the supplier |
Trip strings vary slightly with software version. If your display shows something not listed here, send us a photo of the keypad and we will identify it.
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Digitax ST tripping?
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