Murphy EMS-GC10 - Displaying Alarms - J1939 DM1;DM2, Scania KWP2000, Caterpillar;Perkins

Section 75 00-02-0878
2013-03-07 - 116 -
Normally in SAE J1939, only priority 3 and 6 are used.
Hereafter the data can be read (PGN 61444): 0xcf00400 xD ff 7d 7d e0 15 ff f0 ff
Engine torque
(Data byte 1)
ff
Not available
Driver demand torque
(Data byte 2)
7d
Actual engine torque
(Data byte 3)
7d
Engine speed
(Data byte 4)
e0
Engine speed
(Data byte 5)
15
Source address
(Data byte 6)
ff
Not available
Engine starter mode
(Data byte 7)
f0
Engine Demand
(Data byte 8)
ff
Not available
Calculation example:
RPM resolution is 0.125 RPM/bit, offset 0.
The result is then 15e0 (Hex) or 5600 (dec) 0.125 = 700 RPM.
Displaying Alarms - J1939 DM1/DM2, Scania KWP2000, Caterpillar/Perkins
Besides some engine –specific alarms which are shown in the standard alarm list, the J1939
Diagnostic messages DM1 (active alarms) and DM2 (hirtoric alarm log list as well as the
Scania KWP 20000 alarms can all be shown on the display.
J1939
Press the LOG button for 2 seconds. That will display the alarm log.
Example:
SPN 100 FMI15 oc34
Oil pressure
Slightly above range
CLRALL DM1 DM2
The alarm log always shows the DM1 (active alarms) as default. By selecting DM2 (move the
cursor under DM2 and press ENTER), the historical alarm list can be shown.
Use the up and down buttons to scroll through the list.
oc: This indicates how many times a specific alarm has occurred.