Worth Data RF Terminal 7000 - Manual (Page 83)

Relays should be set to the same channel as the Base station and RF Terminals that you will be using in your
system. Determining the current channel is the same as on the Base station; power up the Relay and count the
number of times the LED flashes (channel + 3). The default setting is channel 0 (3 flashes). Each Relay also
requires a unique Relay ID; the default ID is 0. A Relay will blink yellow; a Base blinks green.
Changing a Relay back to a Base
You can convert the Relay back to a Base Station by setting the Base/Relay jumper to the Base position. You
can check the outcome by simply powering up the unit - a Base blinks green; a Relay blinks yellow.
Changing the Channel on a Relay
The Relay must have their channel set to the same channel as the RF Terminals in their network. The
channel is set on a Relay by turning a rotary switch to the setting 0-5. Use a very small flat head screwdriver
to turn the switch to the desired number.
Setting the Relay ID
If you only have one relay, there is no need to set the Relay ID which is shipped default as relay 1. If you
need to change it or you have multiple relays, it must be changed using the RF 7000 Base Serial
Configuration Utility.
RS-422 Termination
When adding Relays to a system, the last Relay(s) in the line(s) must be terminated. By default, all Base
stations are shipped as terminated. Use the following guidelines to change the termination for your system:
Refer to the circuit board diagram on the previous page for details.
• If the Base has multiple strings of relays radiating from it, the Base would not be terminated but each Relay
would.
• If the Base is first in a string, (not in the middle or end of a string), set the 422 jumpers to Base w/RS-422
termination.
• The last Relay in each string should have its jumpers set as a Relay w/RS-422 termination. Any Relay that is
not the last relay in the string would not be terminated.
•
Relay Station failures are often cable-related. If a Terminal puts out a “Who Can Hear Me?” message
and a Relay that is for some reason not connected to the Base Station (bad cable, cut cable, broken
connectors) hears it, it answers with the message:
Relay n Cannot Be
Heard by the Base
Notify Supervisor
Press Any Key
At this point, it is up to the operator to notify someone that the Relay is not communicating with the Base
and to check the cabling first. There is no message sent to the host, so it is very important that the operator
that receives this message notify someone immediately.