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 25 of 27 Revision 1.0
The following abbreviations are used in the above bit field description:
RLY - Relay
OC - Over Current
OV - Over Voltage
UV - Under Voltage
VR - Voltage Ripple
10
Hold Off - Set if breaker hold-off time is greater than zero.
Alarm Inhibit
11
- Set when breaker is turned on for one UDP frame.
A.6. Hotel Array
The hotel array consists of twelve repeating groups of fields, each analogue input being
represented by the following data:
The analogue data status has the following format:
The Low Fault and High Fault indications correspond to the value exceeding the specified
limits for the input
12
.
10
This fault condition is set by the VENUS system shore station software only
11
Note that that this bit should never be one for more than one UDP frame at a time. The bit is set to
prevent alarm checking for one second after a breaker is turned on so as to allow for the telemetry to
stabilise.
12
This mechanism is included in case there is a need in the future to deal with analogue inputs other than
the breakers requiring fault checking. At this time the status field is not used.
0 1 2 3 4 5 6 7
unused unused unused unused unused unused High
Fault
Low
Fault
VR
Fault
UV
Fault
OV
Fault
Ground
Fault
OC
Fault
OC
Warn
RLY
ON
FET
ON
0 1 2 3 4 5 6 7
unused unused unused unused unused unused Alarm
Inhibit
Hold
Off
8 9 10 11 12 13 14 15
Status
Unsigned integer
1 byte
Value
Signed integer
2 bytes
Lo
w Limit
Signed integer
2 bytes
High Limit
Signed integer
2 bytes