Target Address; Address Delimiter; Instruction Code - Comtech EF Data CDM-710 Installation And Operation Manual

CDM-710/L Broadcast Satellite Modem
Serial Interface Operation

9.3.2 Target Address

A Controller does not have its own address. The Controller sends a packet with the address of a Target. This is the
destination of the packet. When the Target responds, it uses that same address. This shows the Controller which
Target is the source of the response packet. Up to 9999 Target devices can have unique addresses:
• In EIA-232 applications, this address is set to 0.
• In EIA-485 applications, the range of addresses is 0001 to 9999. Use the Target device's HTTP Interface to set
its address.

9.3.3 Address Delimiter

This is the / character (ASCII code 47). It is sometimes known as the forward slash character.

9.3.4 Instruction Code

This code consists of three alphanumeric characters. Only upper-case alphabetic characters A through Z (ASCII codes
65 through 90), and numerals 0 through 9 (ASCII codes 48 through 57) are valid.
The Instruction Code identifies the subject of the message (the "command" or "query"). As much as possible, the
instruction code characters are related to the message. For example, TFQ means "transmit frequency", or RMD
means "receive modulation type".
9–5
MN/CDM710.IOM
Revision 12