VooDoo DCR 6024 Planning & Installation Manual page 126

DCR 6024/6128/6000
CMD 1
Data count
CMD 2
DATA
CHECKSUM
Connector pin
assignment
Planning and Installation – Rev. 1 / 7. 2001
CMD1 assigns the command to the following main function groups which serve to
define the function and the transfer direction of the data words which follows (see
table below):
CMD 1 Function
0 System control
1 System control - return message
2 Tape deck control
4 Setup and selection control
8 Data request
7 Data request return message
Defines the number of the data words which are inserted after CMD2 (0 to F hex).
Is the specific command to the DCR 6024 or the command return message from
the DCR 6024, respectively.
The number of data words and their contents are defined by the CMD2 command.
The sum of the data (D0 to D7) contained in each data word i.e. from CMD1/DATA
COUNT up to the last data word before the checksum. The Checksum is used to
verify that the data are error free and makes sure that transmission sequences
which are affected by bit errors are rejected.
The interface of DCR 6024 uses a 9-pin female subminiature D connector whose
pin out is shown in the table below.
REM 2 IN – RS 422A
1 1
9
6
5 5
9 pole D type 9 pole D-type
female
Fig. 603: Pin assignment remote 2 IN
Transfer direction
Control system DCR 6024
------->
<-------
------->
<-------
------->
<-------
Pin-No.
1
2
3
4
5
6
7
8
9
6. Interfaces
Signal
Ground
Transmit A
Receive B
Ground
Not used
Ground
Transmit B
Receive A
Ground
6 – 7