Displayed Messages (Visualization) - Woodward easYgen-2000 Series User Manual

7.5.1

Displayed Messages (Visualization)

Diagnostic trouble codes (DM1/
DM2)
Standard visualization messages
SPN PGN Description
52 65262 Engine intercooler temperature
91 61443 Throttle position
37535B
Most of the J1939 data is standardized and has a SPN (Suspect
Parameter Number), which describes the data (e.g. SPN 110 is
representing the value of the current "Engine Coolant Tempera‐
ture"). The SPNs are packed in different PGNs (Parameter Group
Numbers). The PGN is a part of the CAN ID and is representing
one CAN message (e.g. SPN 110 is packed in PGN 65263). J1939
defines several hundred SPNs. However, only a small part is
important for most of the applications. For this reason only a part of
the SPNs is supported by the J1939 devices and by the easYgen.
'SAE J1939' also allows manufacturer-specific data areas, so
called proprietary data, which are not defined in the standard. In
most cases, these proprietary data is used for remote control pur‐
poses (like start/stop, speed setpoint) of ECUs (Engine Control
Unit). Some manufacturers also issue specific error messages
using manufacturer-specific data. Besides important standardized
data, the easYgen is also supporting some proprietary data for the
different ECUs. Please refer to
ECUs & Remote Control Messages" on page 462 for details.
Visualization messages like "Engine Coolant Temperature" of a
device (for example an ECU) are received on the CAN bus
according to J1939 protocol and are shown on the device display
and the ToolKit configuration software. In most cases the visualiza‐
tion works with standard messages.
The easYgen is able to display all values listed in the table
Ä "Standard visualization messages" on page 457 if they are sup‐
ported by the connected device as well.
In the J1939 status screen the first 10 active alarm messages
(Active Diagnostic Trouble Codes - DM1) and the first 10 unac‐
knowledged alarm messages (Previously Active Diagnostic
Trouble Codes - DM2) with SPN, FMI, and OC are displayed.
The state of the lamps (amber/red) is always displayed.
SPN (= Suspect Parameter Number) indicates the measured
n
value that the alarm code is referring (e.g. SPN = 100 corre‐
sponds to oil pressure).
FMI (= Failure Mode Indicator) specifies the alarm more pre‐
n
cisely (e.g. FMI = 3 means: value is above predefined limits)
OC (Occurrence Count) indicates how often an alarm occurred.
n
Refer to the J1939 specification for a list of all SPNs.
Resol. Data range
J1939
1 °C -40 to 210 °C
0.1 % 0 to 100 %
easYgen-2200/2500 | Genset Control
Interfaces And Protocols
J1939 Protocol > Displayed Messages (Visual...
Ä Chapter 7.5.2 "Supported J1939
Index Display with
defective
sensor
15217 32766 °C
15207 3276.6 %
Display with
missing sensor
32767 °C
3276.7 %
457