Target-To-Controller Rules - Comtech EF Data SLM-5650A Installation And Operation Manual

10.2.4.5.2

Target-to-Controller Rules

From Target-to-Controller, the Target transmits the symbol =, ?, !, *, or # (ASCII codes 61, 63, 33, 42, or 35) to the Controller:
= (ASCII code 61)
"=" displays in two ways:
1. If the Controller sends a command to set a parameter's value, and the parameter value is valid, the Target accepts the command
by replying with no message arguments. For example: >0001/TFQ={CR}{LF}
2. If the Controller sends a query to a Target, the Target responds with the configured setting. For example, the query TFQ? means
"query the current value of the transmit frequency" – the Target responds with >0001/TFQ=xxxx.xxxx{CR}{LF} (where 'xxxx.xxxx'
represents the configured frequency value).
? (ASCII code 63)
"?" is used as follows:
If the Controller sends a command to set a parameter to a particular value, and that value is not valid, the Target rejects the command by
echoing the instruction code, with no message arguments, followed by this character. For example: >0001/TFQ?{CR}{LF}. This indicates
that there was an error in the instruction code sent by the Controller.
! (ASCII code 33)
"!" displays when the Controller sends a command that the Target does not recognize. The Target rejects the command by echoing the
invalid instruction code, followed by this character. For example: >0001/XYZ!{CR}{LF}
* (ASCII code 42)
"*" is used if the Controller sends a command to set a parameter to a particular valid value, but the modulator will not permit that
parameter to be changed at that time. The Target will reject the instruction by responding with this character, with message arguments.
For example: >0001/TFQ*{CR}{LF}.
# (ASCII code 35)
"#" is used if the Controller sends a command to set a parameter that is correctly formatted, but the modulator is not in Remote mode, the
modem will not permit that parameter to be changed at that time. The Target will reject the instruction by responding with this character.
For example: >0001/TFQ#{CR}{LF}.
Serial Remote Control 10–5
SLM-5650A Satellite Modem
Revision 10
MN-SLM-5650A