Western Reserve Controls
WRC-CANR-DF-DN and –SM User’s Manual
PUB 14.2
Revision 4.03
22
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Additional diagnostics:
o
A “heartbeat” feature has been added to the fiber link on Series III and IV WRC-
CANR-DF-DN units. A heartbeat message is generated between the 2 CANR
units when no CAN activity is present for approximately 0.5 sec, allowing each
unit to confirm the status of the link.
o
The NSB LED indicates the health of the fiber connection for both normal traffic
and the heartbeat.
8.5. 12km Single-mode Fiber Link and Diagnostics (WRC-
CANR-DF-SM)
The WRC-CANR-DF-SM Series IV can be used with single-mode fiber optic cable and has the
following fiber serial link characteristics:
•
Extends your applications for up to 12km at any CAN baud rate.
o
This significantly increases opportunities for applications requiring longer range
network extension than can be accomplished using single mode fiber.
•
Additional diagnostics:
o
As with the mulitmode fiber, a “heartbeat” feature has been added to the fiber link
on WRC-CANR-DF-SM Series IV units. A heartbeat message is generated
between the 2 CANR units when no CAN activity is present for approximately 0.5
sec, allowing each unit to confirm the status of the link.
o
The NSB LED indicates the health of the fiber connection for both normal traffic
and the heartbeat.
8.6. Enhanced CAN Support
The CANR now supports CAN 2.0 Part B, as well as Part A. It also can operate up to 1M Baud
and with CANopen baud rates. (See factory for details.)
8.7. Field Programmable Updates
The CANR Series III and IV units have their programs held in flash memory, which can be
updated in the field. Contact the factory for details.
