Error Response; Optional Message Arguments - Comtech EF Data MN/LBC4000.IOM Installation And Operation Manual

LBC-4000 L-Band Up/Down Converter System
Serial Interface Operation
defines the command configuration parameters that are issued to the
Target.
For example, the Controller-to-Target command "<0001/MUT_A_ON{cr}"
means 'turn ON the mute function of Converter A'.
2. The '_' underscore, when submitted Controller-to-Target without
parameters, functions as a query. Submitted in this format, the Controller
directs the Target to report the current configured value for that
parameter (Instruction Code).
For example, the Controller-to-Target query "<0001/MUT_A_{cr}" means
'return the current state of the mute function of Converter A'.
3. From Target-to-Controller, if the instruction sent from Controller-to-
Target is successful, the Target responds by echoing that same instruction
to the Controller.

8.2.1.5.1 Error Response

If a Target cannot execute a Command or detects a protocol violation, the
Controller generates an error response. For example:
>0001?RED ER Error Message{cr}{lf}
Note that:
• The "/" address delimiter changes in the response to a "?".
• The Instruction Code is echoed, followed by two unique characters
provided for analysis. This example uses "ER".
• A text string explaining the error follows.

8.2.1.6 Optional Message Arguments

Arguments are not required for all messages. Arguments include these ASCII
codes:
• Characters '0' through '9' (ASCII codes 48 through 57)
• Period '.' (ASCII code 46)
• Comma ',' (ASCII code 44)
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