Diagnostics; Status Modes (Keypad And Led Status); Trip Indications; Identifying A Trip / Trip Source - Nidec Unidrive M200 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



1 Drive OK status
2 Trip status
3 Alarm status
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, the display indicates that a trip has occurred and
the keypad will display 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.
Trips are listed alphabetically in Table 12-2 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. The
trip number must be checked in Table 12-2 to identify the specific trip.
Unidrive M200 / M201 Control User Guide
Issue Number: 2
Electrical Getting Basic
installation started parameters
1
2
3
Running the NV Media
Optimization
motor Card
Example
1. Trip code 2 is read from Pr 10.020 via serial communications.
2. Checking Table 12-3 shows Trip 2 is an OV trip.
Comms
code
3. Look up OV 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
OV
PSU
Oht.I
Oht.P
Oh.dc
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.
Figure 12-2 Key to sub-trip number
00 - Generated by the control module
01 - Generated by the power module
0 Upwards - Identifies the location of the trip
00
01
- Reason for the trip
.
.
07
Onboard Advanced
Diagnostics
PLC parameters
Keypad
No. Trip
display
OV
2
PH.Lo
OI.Sn
tH.Fb
P.dAt
x x y z z
UL Listing
129