Diagnostics; Status Modes (Keypad And Led Status); Trip Indications; Identifying A Trip / Trip Source - Emerson Unidrive M400 Series User Manual

Safety Product Mechanical
information information installation
12

Diagnostics

The keypad display on the drive gives various information about the
status of the drive. The keypad display provides information on the
following categories:
•

Trip indications

• Alarm indications
• Status indications
Users must not attempt to repair a drive if it is faulty, nor
carry out fault diagnosis other than through the use of the
diagnostic features described in this chapter.
If a drive is faulty, it must be returned to an authorized
WARNING Control Techniques distributor for repair.
12.1

Status modes (Keypad and LED status)

Figure 12-1 Keypad status modes
Ready
0 . 00 Hz
0 . 0 %
1
T r i p
O v e r V o l t s
2
D r i v e O v e r l o a d
5 0 . 0 0 H z
1 1 5 . 2
3
1 Drive OK status
2 Trip status
3 Alarm status
Unidrive M400 Control User Guide
Issue Number: 1
Electrical Getting Basic
installation started parameters the motor
Status
LED
Status
LED
Flashing
%
Status
LED
Running NV Media Card
Optimization
Operation
12.2 Trip indications
The output of the drive is disabled under any trip condition so that the
drive stops controlling the motor. If the motor is running when the trip
occurs it will coast to a stop.
During a trip condition, where a CI-Keypad is being used, the upper row
of the display indicates that a trip has occurred and the lower row of the
keypad display will show the trip string. Some trips have a sub-trip
number to provide additional information about the trip. If a trip has a
sub-trip number, the sub-trip number is flashed alternately with the trip
string unless there is space on the second row for both the trip string and
the sub-trip number in which case both the trip string and sub-trip
information is displayed separated by a decimal point.
If a display is not being used , the drive LED Status indicator will flash
with 0.5 s duty cycle if the drive has tripped. Refer to Figure 12-2 Key to
sub-trip number .
Trips are listed alphabetically in Table 12-2 Trip indications on page 139
based on the trip indication shown on the drive display. Alternatively, the
drive status can be read in Pr 10.001 'Drive OK' using communication
protocols. The most recent trip can be read in Pr 10.020 providing a trip
number. It must be noted that the hardware trips (HF01 to HF23) do not
have trip numbers (except HF08, HF11, HF12 and HF18 which have
sub-trip number/s). The trip number must be checked in Table 12-2 to
identify the specific trip.
Example
1. Trip code 2 is read from Pr 10.020 via serial communications.
2. Checking Table 12-3 shows Trip 2 is an Over Volts trip.
Comms
code
3. Look up Over Volts in Table 12-2.
4. Perform checks detailed under Diagnosis.
12.3

Identifying a trip / trip source

Some trips only contain a trip string whereas some other trips have a trip
string along with a sub-trip number which provides the user with
additional information about the trip.
A trip can be generated from a control system or from a power system.
The sub-trip number associated with the trips listed in Table 12-1 is in
the form xxyzz and used to identify the source of the trip.
Table 12-1 Trips associated with xxyzz sub-trip number
Over Volts
PSU
OHt Inverter
OHt Power
OHt dc bus
The digits xx are 00 for a trip generated by the control system. For a
drive, if the trip is related to the power system then xx will have a value of
01, when displayed the leading zeros are suppressed.
For a control system trip (xx is zero), the y digit where relevant is defined
for each trip. If not relevant, the y digit will have a value of zero.
The zz digits give the reason for the trip and are defined in each trip
description.
Onboard Advanced
Diagnostics
PLC parameters
Keypad
No. Trip
display
Over Volts
2
Phase Loss
OI Snubber
Temp Feedback
Power Data
UL
information
137