APPENDIX A – SCI PROTOCOL AND INTERFACE
A7
SERIAL CONTROL AND MODE SWITCHES The system conf iguration DIP switches S2 and S3 ar e located on the front edge of the SCI-MRX printed circuit board.
The power supply frame holds the SCI-MRX module. Remove the f ront panel of the frame to access the switches. The
momentary push-button reset switch S1 is positioned next to S3. See INTRODUCTION for details.
This chart sets the communications Baud Rate.
S2,1 S2,2 Baud Rate
ON ON 9600
OFF ON 19200
ON OFF 38400
OFF OFF 57600
This chart sets the number of switcher inputs (sources).
S2,3 S2,4 S2,5 Input Range
ON ON ON 01 - 16
OFF ON ON 01 - 32
ON OFF ON 01 - 48
OFF OFF ON 01 - 64
ON ON OFF 01 - 80
OFF ON OFF 01 - 96
ON OFF OFF 01 - 112
OFF OFF OFF 01 - 128
This chart sets the number of switcher outputs (destinations).
This chart indicates protocol format and logical address.
S2,9 S2,10 S2,11 Logic Address
ON ON ON RS-232∗
OFF ON ON 01
ON OFF ON 02
OFF OFF ON 03
ON ON OFF 04
OFF ON OFF 05
ON OFF OFF 06
OFF OFF OFF 07
Use address 00 for RS-232. All other settings are for RS-422 operation.
Control Level Control Panel Type Handshaking Reserved Panel Scan
S2, 12 Levels S3,1 Panel Type S3.2 Handshaking S3.3 S3.4 Panel Scan
ON 8 ON Numeric ON Enabled Reserved ON Scan ALL
OFF 4 OFF Alpha OFF Disabled OFF Scan Active
NOTE 1 - Fixed serial communications parameters are: 8 Character bits 1 Stop bit No Parity
NOTE 2 - Synchronous mode switching occurs on line 10 in NTSC and line 7 in PAL when reference is supplied.
S2,6 S2,7 S2,8 Output Range
ON ON ON 01 - 16
OFF ON ON 01 - 32
ON OFF ON 01 - 48
OFF OFF ON 01 - 64
ON ON OFF 01 - 80
OFF ON OFF 01 - 96
ON OFF OFF 01 - 112
OFF OFF OFF 01 - 128
1
2
3
4
5
6
7
8
9
10
11
12
Off [down] / ON [up]
S2
1
2
3
4
S3
The Dip switch settings below are configured for a 4 level
32x32 matrix using RS-232 protocol at 38,400 baud rate.
R
E
S
E
T