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5 – System Configuration

DPN 402197 © TSS (International) Ltd Page 3 of 10

5.2 POWER-ON PROCEDURE

During its initialisation, DeepView for Windows searches for a valid initialisation file on

the SDC hard disk. If the file exists and the SDC receives compatible data packets from

the SEP, DeepView for Windows will begin to operate using the configuration details

stored in the initialisation file. If DeepView for Windows does not find the initialisation

file or if there are no compatible data packets arriving from the SEP, it will start the Sys-

tem Configuration Wizard to help you establish reliable communications.

For this reason it is usually better to power-on the sub-sea installation before you

power-on the SDC.

Power-on the sub-sea components of the 350 System:

All electrical power for the sub-sea components arrives through a single cable into the

PSU, which generates the following stabilised and conditioned DC supplies:

❐ All supplies necessary to operate the SEP

❐ Power for a suitable sub-sea altimeter connected directly to the SEP. If you con-

nect your altimeter to the SDC instead then you must provide a separate power

supply for it.

❐ Drive current for the 20mA digital current-loop

Refer to sub-section 4.1 for instructions to make the electrical connections to and

between the sub-sea components of the 350 System. The System starts to operate

when you provide the correct electrical supply to the PSU.

Power-on the sub-sea components of the 350 System. At the SDC, the power switch,

CD-ROM drive, USB ports and indicator LEDs should be visible.

Check that the ‘C/LOOP’ LED shows red to indicate the presence of the 20mA drive

current in the communication current-loop. Because the SEP generates this drive cur-

rent, the LED should show red even before you power-on the SDC. By showing red,

the LED provides two important visual checks on the System:

❐ It confirms that the SEP is receiving electrical power from the ROV.

❐ Because the LED is in series with the current-loop, it proves the loop is intact.

Note that the LED shows only that the current-loop is intact – it does NOT indicate

that there are successful communications passing between the SDC and the

SEP.

The ‘C/LOOP’ LED will show red only if you use either of the two available current-loop

communication methods – it will not illuminate if you use the RS232 communication

method.

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