Specifications

Danish Interpretation Systems Technical Specifications

Printed in Denmark

Messages in MAIN_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.

MAIN_FOUND_UNIT

Command item value: 26

Message format:

<START> 'c' <ID> <MSB addr> <LSB addr> <0> <8> <26> <Unit Type> <Addr MSB> <Addr LSB> <SerialNumber

Byte 1> <SerialNumber Byte 2> <SerialNumber Byte 3> <Unit Functionality> <CRC> <STOP>

The CU sends this message to the external control unit when a new unit is registered. The Unit Type

field specifies what type of unit was registered. The relation between the unit type and the number is

shown in the table below.

Type of unit Unit Type Number

Delegate Microphone 1

MU Box Delegate Microphone 6

Chairman Microphone 2

MU Box Chairman Microphone

Messages reporting about other unit types can be ignored.

The CU has assigned the address 256*Address MSB + Address LSB to the new unit. The serial number

for the unit is stored in the three bytes Serial Number 1, Serial Number 2 and Serial Number 3. On the

boxes and the displays of the units the serial numbers are written as three numbers between 0 and 255

with dots between (Serial Number 1.Serial Number 2.Serial Number 3).

The Unit Functionality indicates support for chip card, voting and microphone sharing – to be

disregarded.

MAIN_LOST_UNIT

Command item value: 4

Message format:

<START> 'c' <ID> <MSB addr> <LSB addr> <0> <8> <4> <Unit Type> <Addr MSB> <Addr LSB> <SerialNumber Byte

1> <SerialNumber Byte 2> <SerialNumber Byte 3> <Unit Functionality> <CRC> <STOP>

The CU sends this message to the external control unit when a unit is lost (for example if it is

disconnected from the system or the communication with the unit breaks down because of faulty

cables). The parameters are the same as for the MAIN_FOUND_UNIT message.

4.5.1 Messages in EXTERNAL_CONTROL_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.