Hello,

Can anyone help me how to fix trip log display on Mark V using <I>? When we access the trip log, there is no data on the screen.

Thank you.

 

When did this problem begin?

Data is "frozen" in RAM when L4 drops out (goes false; changes from a logic "1" to a logic "0"). If <C> was recently re-booted and the unit hasn't been tripped or shutdown since the re-boot, there probably won't be any data.

Have you tried looking at the data after a trip or shutdown? If the unit hasn't been tripped or shut down for some time, how long has it been since a trip or shutdown?

Was <C> recently re-booted/re-started?

When you say there is no data, are the Trip Log targets at the bottom of the display Trip Log display?

Have you looked at the Mark V Maintenance Manual, GEH-5980, Sect. 6.9, on configuring the Trip Log ("Trip History")?

Have you looked at the file HIST_B.SRC to see if everything in the file is okay and that HIS_AGE is the first signal in the file? There should be no more than 63 other points in the file.

Presuming the file is okay, use the Table Compiler to recompile the Trip Log files with the following command:

TABLE_C HIST

If there are no errors during the compile, use the EEPROM Downloader to download the file to <C> with the following command:

EEPROM DOWN T1 C HIST

(It is presumed the two-character unit designation for the Mark V is T1; if not, use the proper designation in place of T1.)

Then use the power switch in the <PD> core to cycle the power to <C>, waiting about 30 seconds after opening the switch before closing it (do this with the unit not running). This should ensure a good Trip Log file is in <C>. Again, there won't be any data until L4 goes to logic "1", and then to logic "0". You could try initiating a Start, and as soon as the shaft breaks away from zero speed, give the unit a Stop, then check the Trip Log to see if it's now collecting data.

If not, what Diagnostic Alarms are present. List all Diag. Alarms, even if they seem un-related.

Are there any error messages being displayed on the LCC(SLCC) display? If so, what are they?