Teledyne 440, Системное руководство, Страница: 60 / 256

4 – Electrical Installation
4-14 © Teledyne TSS DPN 402196 Issue 4.1
NOTE
It is a good idea to keep the links on the spare Main Board set identically to those
in the SEP. This avoids potential communication problems if you need to replace
the Main Board from the field support kit during a survey.
Configure the SDC
WARNING
The SDC10 provides an external switch on the comms module to configure the
communication protocol used. Do not open either the Panel PC orthe comms
enclosure to change the comms protocol.
To change the communication method you will need to move the selector switch on the comms module
to the required position (see
Figure 4-2 above).
Figure 4-5: Comms selector switch positions
The available switch positions are shown in Figure 4-5 4-5 and described in the table below:
After you have changed the communication method, you must run the configuration wizard from
DeepView for Windows to re-establish comms or comms errors will be generated.
NOTE
You must perform a communication check as part of the pre-dive tests. See sec-
tion 6.3.2 "Pre-dive Checks" on page 6-12 for details of the recommended pre-
dive test procedure.
Comms Protocol Switch Position
2-wire Current Loop Left-hand position
4-wire Current Loop Central position
RS232 Right-hand position
2 WIRE
C/LOOP
4 WIRE
C/LOOP
RS232
2 Wire C/Loop
selected
2 WIRE
C/LOOP
4 WIRE
C/LOOP
RS232
4 Wire C/Loop
selected
2 WIRE
C/LOOP
4 WIRE
C/LOOP
RS232
RS232
selected