User`s manual

Western Reserve Controls WRC-CANR-DF-DN User’s Manual
PUB 14.1 Series 3
19
8. Summary of Changes to Series 3 from Rev 2
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 3.
• The Series 3 has an 8-position DIP switch block. All 8 switches are defined and used.
• Both sides’ baud rates can be set up independently.
• A “remote mode” exists which allows either side to set its baud rate based on the other
side’s BR – in either fixed baud or autobaud.
• See Section 4.3 for details.
8.2. Indicator LED’s
The definition of some states of the LEDs have changed. Refer to Section 4.2 for details.
8.3. Terminating Resistors
The Series 3 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.
8.4. Operation and Functionality
The previous version CANR required one Type 1 and one Type 2 unit per connection. The Series 3
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 product is 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 on the other end.
8.5. 2.2km Fiber Link and Diagnostics
The CANR has 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: