Microphone In Request; Microphone Is Turned Off; Delegate Off Activate Acknowledge Message; Delegate Off Deactivate Acknowledge Message48 - DIS CDS 4000 User Manual & Installation Manual

CDS 4000
This message is sent when a microphone is put in
request.

Microphone in Request

"!r<CU><CHAIN><MIC><CHKSUM>"
This message is sent as response to a request for the
system status. The message is sent for each
microphone currently in request. The messages are
ordered so that the microphone put in request first
will be identified in the first message and so forth.

Microphone is turned off

"!O<CU><CHAIN><MIC><CHKSUM>"
This message is sent, when a microphone is turned
off. This message is used regardless of whether the
microphone was in Speak or Request before it was
turned off.
Delegate Off activate acknowledge
message
"!D<CR>"
This message is sent from the interface card to
acknowledge the reception of a Delegate Off
activate message.
Delegate Off deactivate acknowledge
message
"!d<CR>"
This message is sent from the interface card to
acknowledge the reception of a Delegate Off
deactivate message.
Conversion Table download
acknowledge message
"!P<POSmsb><POSlsb><CHKSUM>"
This message is sent from the interface card to
acknowledge the reception of a Conversion Table
Manual no. 4479, Printed in Denmark, 10/02
download message. The bytes <POSmsb> and
<POSlsb> identifies the position in the conversion
table where the update was applied.

Test status message

"!T<T1><CHKSUM>"
This message is sent when the microphone system
enters or leaves test mode, and as a response to the
test status request message. If the byte <T1>=0 the
system is not in test-mode. If <T1>=1 the system is
running a test controlled by the master CU - other
values of <T1> identifies which MC panel is
currently running a system test. When the system is
in Test mode it is not possible to control the
microphones via the interface card.

RS4232 card internal buffer overflow

"!X<CR>"
This message is sent when an internal buffer
overflow occurs in the RS4232 card. This may
occur if the RS4232 card receives messages from
the master CU at a higher rate than it can relay the
messages over the serial port - this may occur if the
PC or other equipment connected to the RS4232
card holds off transmission with the hardware
handshake signal. Once transmission is re-
established, the overflow message will be sent, and
the external equipment has notified that one or
more microphone Speak/Request/Off messages
were lost. These are the only messages that can
provoke an overflow, as all other messages are non-
synchrone. When the external equipment has
notified that some messages were lost, it is able to
re-achieve correct microphone status by sending the
microphone status request message to the RS4232
card and collect the response from this request.
It is necessary to allow this overflow possibility to
ensure that a faulty computer connected to the
RS4232 card does not bring down the entire
microphone system.
RS232 PROTOCOL
APPENDIX 1, 48