Western Reserve Controls 1782-JDO Uživatelský manuál stáhnout pdf (Strana 25)

Western Reserve Controls WRC-CANR-DF-DN and –SM User’s Manual

PUB 14.2 Revision 4.03

8. Summary of Changes to Series IV from Rev 2 and

Series III

To facilitate implementation of the new Series III 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 IV.

• Like the Series III, the Series IV has an 8-position DIP switch block. All 8 switches are

defined and used.

• The Series IV 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 IV 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 III

and IV products now make no differentiation – there is only one design. Therefore, you do not need to be

concerned with “matching pairs”.

Important

The

Series III and IV 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 III or IV on the other end. The same is true with networks with a Series III on one end and a

Series IV 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 III and IV 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.

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Western Reserve Controls 1782-JDO Uživatelský manuál Strana 25