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Danish Interpretation Systems Technical Specifications
Printed in Denmark
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EXTERNAL_UNIT_ADDRESS
Command item value: 2
Message format:
<START> 'c' <ID> <MSB addr> <LSB addr> <27> <4> <2> <Addr MSB> <Addr LSB> <External Identity> <CRC>
<STOP>
The CU sends this message to tell the external control unit what address it has been assigned. The
address is 256*Address MSB + Address LSB.
The External Identity is the value, which the registering unit has already sent to the CU.
EXTERNAL_HEART_BEAT_REQUEST
Command item value: 3
Message format:
<START> 'c' <ID> <MSB addr> <LSB addr> <27> <2> <3> <Error Information> <CRC> <STOP>
The CU periodically requests a “heart beat“ from the external control unit by sending this message.
The external control unit is required to respond to this message with an
EXTERNAL_HEART_BEAT_RESPONSE message. This is done in order to monitor if the external
controller is still present. This message is always sent to the control units group address (4013).
The message includes error information from the CU – to be disregarded.
4.5.2 Messages in MICROPHONE_STATUS_GRP
The following subsections describe each of the messages in the group. The message format
descriptions have the same meaning as in section 3.4.4.
MICROPHONE_STATUS_DELEGATE_OFF_ACTIVE
Command item value: 1
Message format:
<START> 'c' <ID> <MSB addr> <LSB addr> <23> <3> <1> <Control Unit Addr MSB> <Control Unit Addr LSB>
<CRC> <STOP>
This message is sent when a control unit/chairman unit activates the delegate off mode. The address of
the unit that issued the command to enter this mode is 256*Control Unit Address MSB + Control Unit
Address LSB.
MICROPHONE_STATUS_DELEGATE_OFF_INACTIVE
Command item value: 2
Message format:
<START> 'c' <ID> <MSB addr> <LSB addr> <23> <4> <2> <Control Unit Addr MSB> <Control Unit Addr LSB>
<Delegate Off Status> <CRC> <STOP>
This message signifies that a control/chairman unit that previously made the system enter the delegate
off mode no longer requires this mode to be active. The address of the unit is 256*Control Unit MSB +
Control Unit LSB.