Emerson Digitax ST User Manual page 187

Safety Product Mechanical
Information information installation
Trip
OI.AC Instantaneous output over current detected
Over current threshold is Kc/0.45 (see the Digitax ST Advanced User Guide for Kc values)
Acceleration /deceleration rate is too short.
If seen during autotune reduce voltage boost Pr 5.15
Check for short circuit on output cabling
Check integrity of motor insulation
Check feedback device wiring
3
Check feedback device mechanical coupling
Check feedback signals are free from noise
Is motor cable length within limits
Reduce the values in speed loop gain parameters – Pr 3.10, Pr 3.11 and Pr 3.12
Has offset measurement test been completed?
Reduce the values in current loop gain parameters - Pr 4.13 and Pr 4.14
OI.br Braking transistor over-current detected: short circuit protection for the braking transistor activated
Check braking resistor wiring
4 Check braking resistor value is greater than or equal to the minimum resistance value
Check braking resistor insulation
O.Ld1 Digital output overload: total current drawn from 24V supply and digital outputs exceeds 200mA
26 Check total load on digital outputs (terminals 24,25,26)and +24V rail (terminal 22)
O.SPd Motor speed has exceeded the over speed threshold
Increase the over speed trip threshold in Pr 3.08
7
Reduce the speed loop P gain (Pr 3.10) to reduce the speed overshoot
OV DC bus voltage has exceeded the peak level or the maximum continuous level for 15 seconds
Increase deceleration ramp (Pr 0.04)
Decrease braking resistor value (staying above the minimum value)
Check nominal AC supply level
Check for supply disturbances which could cause the DC bus to rise – voltage overshoot after supply recovery from a notch induced
by DC drives.
2
Check motor insulation
Drive voltage rating
200
400
If the drive is operating in low voltage DC mode the overvoltage trip level is 1.45 x Pr 6.46.
PAd Keypad has been removed when the drive is receiving the speed reference from the keypad
Instal keypad and reset
34
Change speed reference selector to select speed reference from another source
PH AC voltage input phase loss or large supply imbalance detected
Ensure all three phases are present and balanced
Check input voltage levels are correct (at full load)
N
32
NOTE
Load level must be between 50 and 100% for the drive to trip under phase loss conditions. The drive will attempt to stop the motor
before this trip is initiated.
PS Internal power supply fault
Remove any Solutions Modules and reset
5
Hardware fault - return drive to supplier
PS.10V 10V user power supply current greater than 10mA
Check wiring to terminal 4
8
Reduce load on terminal 4
PS.24V 24V internal power supply overload
The total user load of the drive and Solutions Modules has exceeded the internal 24V power supply limit.
The user load consists of the drive's digital outputs, the SM-I/O Plus digital outputs, the drive's main encoder supply and the SM-
Universal Encoder Plus encoder supply.
9
• Reduce load and reset
• Provide an external 24V >50W power supply
• Remove any Solutions Modules and reset
PSAVE.Er Power down save parameters in the EEPROM are corrupt
Indicates that the power was removed when power down save parameters were being saved.
The drive will revert back to the power down parameter set that was last saved successfully.
37
Perform a user save (Pr xx.00 to 1000 or 1001 and reset the drive) or power down the drive normally to ensure this trip does or occur
the next time the drive is powered up.
Digitax ST User Guide
Issue: 3
Electrical Getting Basic
installation started parameters
Peak voltage Maximum continuous voltage level (15s)
415
830
www.controltechniques.com
Running the SMARTCARD
Optimization
motor Operation
Diagnosis
400
800
Onboard Advanced Technical
Diagnostics
PLC parameters Data
UL listing
information
187