Danfoss VLT AutomationDrive FC 301 Programming Manual page 181

Parameter Descriptions
3.15.3 Service Log
The service log functionality saves detailed log information
of a 5-seconds interval in cases when certain alarms occur.
Service technicians can analyze this information to
troubleshoot and optimize the frequency converter.
The frequency converter can save up to 24 service log
records in the flash memory.
Find the list of alarms that trigger a service log record in
chapter 3.15.6 Alarms that Trigger a Service Log Record.
Application-dependant trips/alarms, for example, Safe
Torque Off, do not trigger a service log record.
Sampling rate
There are 2 periods with different sampling rates:
•
Slow samples: 20 samples at a rate of 250 ms
resulting in 5 s of history before the trip.
•
Fast samples: 50 samples at a rate of 5 ms
resulting in 250 ms of detailed history before the
trip.
NOTICE
To enable the real-time clock (RTC) stamp, use the real-
time clock module. If real-time clock is not available, the
operating time in parameter 15-32 Fault Log: Time is
recorded.
The service log contains the elements shown in Table 3.28.
# Alarm log data Parameter number
1 Time of trip (1 of the Parameter 0-89 Date and Time
values): Readout or parameter 15-32 Fault
•
Priority real-time Log: Time
clock (if available).
•
Priority operating
time (if RTC is not
available).
2 Alarm code Parameter 15-30 Fault Log: Error
Code
3 Frequency Parameter 16-13 Frequency
4 Speed (RPM) Parameter 16-17 Speed [RPM]
5 Reference (%) Parameter 16-02 Reference %
7 DC-link voltage Parameter 16-30 DC Link Voltage
9 Motor phase U current Parameter 16-45 Motor Phase U
Current
10 Motor phase V current Parameter 16-46 Motor Phase V
Current
11 Motor phase W current Parameter 16-47 Motor Phase W
Current
12 Motor phase voltage Parameter 16-12 Motor Voltage
15 Control word Parameter 16-00 Control Word
MG33MO02
Programming Guide
# Alarm log data
16 Status word
Table 3.28 Service Log Data
3.15.4 Clearing the Service Log
The flash memory stores up to 24 records. To save more
logs, clear the service log memory.
To clear the service log:
1.
2.
Save the service log records using the MCT 10 Set-up
Software before clearing the service log.
Clear the service log after a commissioning to remove any
alarms that occurred during the testing.
Service log indication
Parameter 16-42 Service Log Counter shows the number of
service logs stored in the memory.
The frequency converter indicates a full service log
memory in 1 of the following ways:
•
•
Performing the frequency converter initialization does not
clear the service log memory.
3.15.5 Reading the Service Log Information
Use MCT 10 Set-up Software to read the service log
information.
To read the service information:
1.
2.
3.
4.
Danfoss A/S © 01/2018 All rights reserved.
Parameter number
Parameter 16-03 Status Word
In parameter 14-22 Operation Mode, select option
[5] Clear Service Log.
Power cycle the frequency converter. Clearing the
service log extends the power-up time by approx-
imately 1 s.
The LCP shows the message:
Clear logs Service log full: 28 [M26]
Bit 25 is set high in parameter 16-96 Maintenance
Word (0x2000000).
Open MCT 10 Set-up Software.
Select a frequency converter.
Select the Service Log plug-in.
Click Read from drive.
3 3
179