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Western Reserve Controls WRC-CANR-DF-DN User’s Manual
PUB 14.2 Series 4
19
8. Summary of Changes to Series 4 from Rev 2 and
Series 3
To facilitate implementation of the new Series 3 CANR products for customers that are currently
users of the CANR Revision 2.xx products, this section summarizes the product changes from Rev 2 to
Series 3.
8.1. DIP Switch Baud Rate Settings
Several new options exist for setting the baud rate on the CANR Series 4.
•
Like the Series 3, the Series 4 has an 8-position DIP switch block. All 8 switches are
defined and used.
•
The Series 4 unit is compatible with all CANopen baud rates. These baud rates are fixed
by setting the 8 position dip switch to the appropriate configuration.
•
See Section 4.3 for details.
8.2. Terminating Resistors
The Series 4 has an on-board terminating resistor on the CAN connection that can be selectively
included or excluded from the network circuit. With jumpers W1, the CANR puts a 121-ohm resistor
across the CAN_H and CAN_L lines on sub-network side A. See Section 4.5.2 and Table 4-8 for the
location of this jumper.
8.3. Operation and Functionality
The Rev 2 version CANR required one Type 1 and one Type 2 unit per connection. The Series 3
and 4 products now make no differentiation – there is only one design. Therefore, you do not need to be
concerned with “matching pairs”.
Important
:
The
Series 3 and 4 products are not backwards compatible with the previous
versions
.
You cannot implement a network which consists of a Revision 2 product on one end of the fiber
and a Series 3 or 4 on the other end. The same is true with networks with a Series 3 on one end and a
Series 4 on the other: this will not perform.
8.4. 2.2km Multimode Fiber Link and Diagnostics (WRC-CANR-
DF-DN)
The WRC-CANDF-DN Series 3 and 4 have the following fiber serial link improvements:
•
Extends your applications for up to 2.2km at any CAN baud rate.
o
This significantly increases opportunities for mining, tank farm, remote out-
buildings, and other similar applications.
•
Additional diagnostics: