Parker Vansco - 6 Communication; Controller Area Network; J1939 CAN Capabilities; J1939 CAN Installation Connections

User Guide 39
Communication
The only type of communication available to the VMM2404 is Controller Area
Network (CAN) communication.
6.1. Controller area network
The VMM2404 has 1 Controller Area Network (CAN) communication port(s)
available. The VMM2404 hardware provides controller area network (CAN)
communication according to the SAE J1939 specification, making the VMM2404
compatible with any CAN-based protocol through software.
CAN communication is used to communicate the status of multiple modules that
are connected together in the same network.
6.1.1. J1939 CAN Capabilities
The CAN communicates information at a rate of 250 kbps. VMM2404 input and
output information is transmitted through the CAN at a broadcast rate of 40 Hz.
Lack of regular CAN communication is an indication that there is either a
problem with a module in the network, or a problem with the CAN bus.
The following table provides specifications for the CAN:
Item
Min
Nom
Max
Unit
Max voltage
-
-
32
V
Onboard terminator option
-
No
-
Wake on CAN option
-
No
-
Baud rate
-
250
-
kbps
J1939 compliant
-
Yes
-
6.1.2. J1939 CAN Installation Connections
The CAN connection for the VMM2404 should conform to the J1939 standard.
The J1939 standard is a robust automotive specification that is a good CAN
installation guideline even when the J1939 CAN protocol is not being used.
6. Communication