User manual

OceanWorks International
120 – 6741 Cariboo Road
Burnaby, BC V3N 4A3
Canada
www.oceanworks.com
Document Number: 0848-RPT002 Subsea System User Manual
Author: Graham Cunliffe Page 11 of 27 Revision 1.0
After the initial 60 second lockout period has passed, control of the JB breakers via TELNET
is possible.
5.2. Operational Calibration Procedures
Refer to the NEPTUNE Calibration File Format document for a detailed description of how to
create a JB calibration file.
5.3. Methods of Commanding and Collecting Data from the
System
The subsea software is controlled via TELNET. Refer to the Junction Box Telnet Command
Manual for more information.
Refer to Appendix A for information regarding JB telemetry data.
6. Software Operational Procedure
6.1. Software Start-up
The JB control computer starts running the subsea software automatically when the JB is
powered up. Telemetry data is sent to the surface as soon as the subsea software has
started.
On start-up, the JB control computer performs the initialization operations that are
summarized below:
- The control computer board and Analogue to Digital Converters (ADC) are
initialized. This phase takes approximately 30ms.
- The Ethernet interface and communications are initialized. This phase takes
approximately 3630ms.
- The Ethernet controller type is determined and appropriate set-up actions are
performed based on the controller type. This phase takes approximately 140ms.
- Internal data structures for telemetry are set up and the breakers are
commanded to enter the OFF state via software. This occurs approximately
3800ms after power on.
- The JB controller software enters its main loop in which Telnet commands are
responded to, telemetry data is acquired, fault conditions are detected and
telemetry is transmitted via UDP. The main loop is typically started 3900ms after
power on.
6.2. Normal Operations
6.2.1. System Status Conditions
The subsea software defines the system status bits given in Table 6.2.1.1.