Beyerdynamic MCS 50 User manual

Page 1 of 3 06.12.2005
Interface protocol RS 232 serial port
For MCS 50 and MCS 50/64
Current version from 28.8.2003
Standardpin-out ofany RS 232 com port (9pin):
Sub- D
pin# function DataFlow MCS <-> control
unit
1 - -
2 TxD ->
3 RxD <-
4 - -
5 GND -
6 - -
7 CTS <-
8 RTS ->
9 - -
Parameters:
•9600 Baud
•8 Databit
•NO Parity
•1Stop bit
RTS means ready tosend, normally active(+V);
CTS is waiting for the Clear-to-send signal from the control device(PC), ifno CTS is sent, Pin7
and 8must be shortened inside the connector.
Softwareprotocol:
Dataexchange intrue ASCII-Code. After any command aCarriage Return(0x0D) will be sent.
The Request-to-talk list is handled internally by the MCS 50 unit.
Pleaseuseastraight, standardRS 232 cable.

Page 2 of 3 06.12.2005
List ofInstructions:
Command DataFlow
MCS <-> PC
or control
panel
Function
‘PXXX’,CR <- post status changing, 3different ways:
a) post not speaking will lead topost speaking
b) post on Request-to-talk list will lead topost speaking
(list must be updated too)
c) post speaking will lead topost not speaking
XXX = Post number (000 – 032)
‘RXXX_’,CR -> microphone status not active
post icon on PC is off, no text
XXX = Post number (000 – 032)
_= Space(0x20)
‘PXXXM’,CR -> microphone status active
post icon on PC is on, text Mmeans normal delegate
XXX = Post number (000 – 032), M= MicroNormal Delegate
‘PXXXP’,CR -> microphone status active
post icon on PC is on, text P means chairman
XXX = Post number (000 – 032)
P = Micro“Präsident” (German for chairman)
‘RXXXAN’,CR
-> Microphone status not activebut post inrequest totalk list,
letter A means „Anmeldung“ (German for Request-to-talk)
XXX = Post number (000 – 032)
N = position on the list (1-9): 1means first on the list,
9= last on the list
‘P065’,CR <- MCS 50 Reset.
MCS is set intodefault switch-on mode
MCS 50 sends echo ‘P065’,CR
‘P066’,CR <- clear request totalk list
inside MCS 50 the request-to-talk list is cleared.
MCS 50 sends echo ‘P066’,CR and updates request-totalk-list
‘P067’,CR <- Next Function
station withhighest priority inreq.-to-talk list will be switched on (if
max NOMnot reached yet) and will be erased from this list. MCS
sends echo ‘P067’,CR and updates request-totalk-list
‘P068’,CR <- Clear function
All delegatemics will be cleared, chairmen status stays as it is.
MCS sends echo ‘P068’,CR and updates request-totalk-list
‘P068’,CR
‘R068’,CR -> MCS sends ‘P068’,CR, ‘R068’,CR when clear button is pushed at any ofthe chairmen stations
‘P069’,CR <- Clear Function
All delegatemics will be cleared. Chairmen status stays as it is.
Noecho will be sent. Internal flag will be set sothat only
‘P069’,CR will be sent when the clear buttons arepushed on the
chairmen stations. This flag enabletohook-up alsonot intelligent
control panels. The flag is cleared when turning off the power on
the MCS 50.
‘P069’,CR -> This command will be sent from the MCS when clear button on
chairman station is pushed and command ‘P069’,CR was sent
beforetothe MCS 50
‘P070’,CR <- Volume – (decrease)

Page 3 of 3 06.12.2005
Output level is lowered gradually
MCS 50 sends echo‘P070’,CR
‘R070’,CR <- stop lowering output level
MCS 50 sends echo‘R070’,CR
‘P071’,CR <- Volume+ (increase)
Output level is increased gradually
MCS 50 sends echo ‘P071’,CR
‘R071’,CR <- stop increasing output level
MCS 50 sends echo ‘R071’,CR
‘P072’,CR <- Change mode intoRequest-to-Talk.
MCS 50 sends echo ‘P072’,CR followed by areset ofMCS 50
‘P073’,CR <- Change mode intoManual.
MCS 50 sends echo ‘P073’,CR followed by areset ofMCS 50
‘P074’,CR <- Change mode intoOverride.
MCS 50 sends echo ‘P074’,CR followed by areset ofMCS 50
‘P075’,CR <- Change mode intoautomatic (voicecontrolled)
MCS 50 sends echo ‘P075’,CR followed by areset ofMCS 50
‘P090’,CR <- Status check
MCS sends ‘OK’, CR
‘P091’,CR -> One ofthe chairmen has pressed his Priority Button first time
(Priority activate).
When Priority situations occurs, the individual stop or start
(status) messages, resulting from Priority actions (hardwareor
softwareactivated) aresent toPC.
‘P092’,CR -> One ofthe chairman has pressed his Priority Button second time
(Priority deactivate)
‘P093’,CR <- Activation ofPriority Status
‘P094’,CR <- Deactivation ofPriority Status
U. Roth, 28.8.2003