Comtech EF Data CLO-10 - Manual (Page 110)

CLO-10 Link Optimizer Revision 1
Redundant System Operation MN/CLO-10.IOM
A–26
A.7 Daisy Chain Remote Addressing
This appendix provides details of the address requirements to allow M&C of the Redundant Unit
and each of the Traffic Units.
A.7.1 Introduction to Addressing
The user can remotely communicate to the Redundancy Unit controller or any of the Traffic Units
via the DB-9 RS-232/RS-485 Remote connector on the CLO-10 Redundant Unit. A direct User-
to-Traffic Unit connection is not permissible in the Daisy Chain configuration: the Redundancy
Unit communicates to all the Traffic Units via a DB-25 High Speed Bus (HSB) data cable.
A.7.2 Switching Addresses
The permitted base addresses for user remote serial communication are:
•
For RS-485 connections, the only permitted addresses are 1000, 3000, 5000, and 7000.
•
For RS-232, the only permitted address is 0000.
Note: The user serial remote settings within the Redundant Unit are totally independent from
the internal communication between the Redundant Unit and Traffic Units.
A.7.3 Traffic Unit Addresses
Diagrams providing examples of RS-232 and RS-485 addressing schemes are included in this
section, and incorporate the following terminology:
Abbreviation Explanation
MCA
Monitor & Control Address, to be entered as the address of a unit into an M&C
application.
Unit addresses are automatically assigned by the Position on the Dasiy-chained
HSB to which they are associated within the redundant system.
When using RS-485 multi-drop, the redundant system RS-485 base address
can be changed on the Redundant Unit by the user to 1000, 3000, 5000, or
7000 (7000 is shown in the figures in this appendix as an example only).
RCA
Remote Control Address, to be configured via the unit front panel (Main Menu:
Config Æ Remote)
In the figures that follow:
• Figure A-17 illustrates an external RS-232 addressing scheme within a redundant
system.
• Figure A-18 depicts an external RS-485 connection within a redundant system.
• Figure A-19 depicts an external RS-485 connection between multiple redundant systems.