CM2904 Instruction Book © 2009 - 2022 Parker-Hannifin Corporation Page 33 of 51
Module Identification on network
Module ID
7. Module Identification on network
The following shows a typical CAN connection using the SAE J1939 standard:
Figure 7: J1939 CAN connection
7.1. Module ID
The module id in new module is 254 by default. ID can be changed either with
Service Tool (when ID=254) or by using an ID-Tag, which is connected to the
connector mating the CM2904 between address high and low pins.
The ID-Tag will enable a numeric input to the application which can be used to
enable specific functions in the module. Each module can have a unique address. The
maximum number of addresses is eight, denoted as addresses 0, 1, 2, 3, 4, 5, 6, 7
respectively. The ID-Tag can be used for CAN address selection with following
remarks:
-
When module ID is selected and the ID-Tag is removed and Service Tool asks for
the data again, with no reboot -> module id remains at its original value.
-
When module ID is selected and the ID-Tag is removed and reboot is done to
module, then it will not communicate with Service Tool.
-
Once the module id has been saved in the flash memory, Service Tool will not
allow the module id to be changed.
-
In case CAN address needs to be changed and different ID-Tag is applied, boot-
up is required for module to obtain new id.
For defining the module ID, the CM2904 has one module ID interface consisting of an
analog module ID input:
•
MDIN 20 (ADDR_L)
and +V reference voltage output:
•
+8VOut (ADDR_H)
