22-4 9440300990
Communication DECS-250
A second CAN interface (CAN 2) enables the DECS-250 to provide generator and system parameters to
a generator controller such as the Basler DGC-2020. CAN 2 also permits DECS-250 setpoint and mode
control from an external device connected to the CAN.
Both CAN bus interfaces utilize the SAE J1939 messaging protocol.
DECS-250 CAN parameters are listed and defined in the CAN Communication chapter of this manual.
Connections
DECS-250 CAN connections should be made with twisted-pair, shielded cable. Each CAN port
(designated CAN 1 and CAN 2) has a CAN high (H) terminal, a CAN low (L) terminal, and a CAN drain
(SH) terminal. CAN port terminals are illustrated in the Terminals and Connectors chapter of this manual.
Port Configuration
Each DECS-250 CAN port must be identified by a unique address number. The baud rate of each port
can be configured for 125 kbps or 250 kbps.
The Allowed Command Address is the J1939 address from which the DECS-250 will accept broadcast
data. If the address is set to 255 or the same as the DECS-250 CAN Bus Interface address, then
broadcast data is accepted from any address. Otherwise, broadcast data is accepted from only the
specified address. Port configuration settings are illustrated in Figure 22-5.
Figure 22-5. CAN Port Configuration Settings
Remote Module Setup
BESTCOMSPlus Navigation Path: Settings Explorer, Communications, CAN Bus, Remote Module
Setup
HMI Navigation Path: Settings, Communications, CAN Bus, Remote Module Setup
Optional, external modules, such as the contact expansion module (CEM-2020) and analog expansion
module (AEM-2020), communicate via the DECS-250 CAN 1 interface and are configured through the
DECS-250 BESTCOMSPlus interface. These settings are illustrated in Figure 22-6.
Contact Expansion Module
When enabled for operation, the CEM-2020 CAN address is assigned a unique number and the number
of outputs is selected. Standard module (CEM-2020) provides 24 output contacts and high-current
module (CEM-2020H) provides 18 output contacts.
Analog Expansion Module
When enabled for operation, the AEM-2020 CAN address is assigned a unique address for
communication on the network.
To Next Page
Loading...
