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

PVSG User Guide
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6. Communication
e types of communication available to the PVSG family are Controller Area Network (CAN), Wi-Fi, USB
host/device, J1708, LIN, and Ethernet. e types and quantity of communication ports are dependent on
product version.
6.1. Controller area network
e PVSG has 5 Controller Area Network (CAN) communication port(s) available. e PVSG hardware
provides controller area network (CAN) communication according to the SAE J1939 specication,
making the PVSG compatible with any CAN-based protocol through software.
CAN communication is used to communicate the status of multiple modules that are connected to each
other in the same network.
6.1.1. CAN Capabilities
e CAN communicates information at a selectable rate from 125 kbps to 1000 kbps. 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.
CAN communication provides a feature called Wake on CAN, which is a way to provide power control to
the PVSG.
Wake on CAN provides a low-current sleep mode that turns on the PVSG when a CAN message is
received by the module.
It is not possible to lter messages that are used to turn on the PVSG using Wake on CAN. For this reason,
any message will turn on the PVSG. e application software must be written to determine how the PVSG
will behave when it is turned on.
e following table provides specications for the CAN:
Item Min Nom Max Unit
Baud rate limitations (hardware) - - 1000 kbps
Baud rate limitations (software) 125 - 1000 kbps
Wake on CAN current draw - - 500 uA
Termination resistor 120 - - Ω
6.1.2. J1939 CAN Installation Connections
e CAN connection for the PVSG should conform to the J1939 standard. e J1939 standard is a robust
automotive specication that is a good CAN installation guideline even when the J1939 CAN protocol is
not being used.
For a list of J1939 connection considerations, refer to the SAE J1939 specications available through the
Society for Automotive Engineers. SAE J1939-11 covers the physical aspects of the CAN bus including
cable type, connector type, and cable lengths.
Note: e standard variant of the PVSG does not have a CAN termination resistor, which is based on the
assumption that the CAN bus is terminated in the harness.
e following lists the elements that are required for a J1939 CAN connection:
• CAN Cable: A shielded twisted-pair cable should be used when connecting multiple modules to
the CAN bus. e cable for the J1939 CAN bus has three wires: CAN High, CAN Low, and CAN
Shield (which connect to the corresponding CAN_HIGH, CAN_LOW, and CAN_SHIELD pins on the