Simrad AP70 Installation Manual download pdf (Page 53)

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System con guration | AP70/AP80 Operator Manual

Master systems

The international standard for heading control systems (ISO 11674/ISO 16329) requires

controlled command transfer when remote stations are provided. The delegation of control to

the remote station and the return of control shall be incorporated in the autopilot system, and

shall avoid unintended operation from a remote station.

To fulﬁ ll this requirement the AP70/AP80 system includes a Master function. This is used in

larger Wheelmarked systems where you permanently want to control command transfer to

remote stations.

In a Master system, one steering station is deﬁ ned as the Master station. There can be several

control units in a master station, but only one of them can be set as the Master unit.

All units included in the master station will be unlocked, and command transfer within the

master group will be as in an open system.

Units not included in the master station will be locked. It is not possible to take command

from units outside the master station unless the master control unit opens for this. All units

outside the master station will have a lock symbol.

In the illustration below the main bridge is deﬁ ned as master station. One QS80, one AP80

control unit and one AP70 control unit are included in the master station. The AP80 control

unit is deﬁ ned as the Master unit.

The illustration includes SimNet group settings for each unit, showing how the units are

deﬁ ned as part of diﬀ erent SimNet stations.

WING STATION

AFT STATION

3 3

MAIN BRIDGE

De ning a Master system

A master station is usually deﬁ ned and units assigned to the master station during system

setup.

 Note: When a SimNet group Station is set to Master, one control unit in this steering station

has to be deﬁ ned as the Master unit as shown below.

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Simrad AP70 Installation Manual Page 53