PRORXD Broadcast Receiver User Guide
Commercial in Confidence
Broadcast Solutions, HD/SD Products,
PRORXD
100167
Revision: 7.0
Commercial in Confidence
Page 12-100
12.
Appendix E – Remote Control Guide
This section describes the control protocol used on the RS232 interface for controlling the PRORXD.
12.1
About the RS232 Control General Principles
The physical interface is RS232 but this can be converted to RS485 with an external adapter where multiple
units are controlled across one RS485 bus.
Usual operation involves sending a packet from the control device (usually a PC) to the device being
controlled. If the packet satisfies an address integrity check, then the controlled device will action the
command and send a reply.
For compatibility with modems an ASCII style protocol is used.
Ports are set for 115200 baud, 8 bits, No parity, 1 stop.
12.2
About the Command Packet Structure
ASCII
Value
Notes
STX
02h
Start byte
0-9
30h-39h
4 byte unit address. In range 0-9999
R
20h-7Eh
1 byte command type. r read, w write
ABCD
20h-7Eh
Command –four byte mnemonic
;
3Bh
Separator
PQR
20h-7Eh
Data –Optional, variable length
;
3Bh
Separator
X
20h-7Eh
Sum Check
ETX
03h
End byte
12.3
About the Reply Packet Structure
ASCII
Value
Notes
STX
02h
Start byte
0-9
30h-39h
4 byte unit address. In range 0-9999
Z
20h-7Eh
Status BYTE
PQR
20h-7Eh
Data –Optional, variable length
;
3Bh
Separator
X
20h-7Eh
Sum Check
