Xicom XTU-400K, Operation And Installation Manual

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MNC-0500-002 22 of 36 Revision H
Amplifier Communication and Protocol, Octagon ISA CPU
Advanced Query
Command Byte : '?'
Description:
The Advanced Query feature, which is included in firmware versions 3.56 and higher, is
intended to streamline the user’s polling loop by allowing the user to construct custom query
sequences. It is a complete polling solution returning virtually any measurement you might
want.
Measurements are requested using a variable length parameter list. The length of the
response will vary according to the measurements selected. Measurements are returned in
the order specified by the user.
The syntax of an Advanced Query command is as follows:
<start character><address><‘?’><parameter 1><parameter 2>…<parameter last><end
character><check character>
Note: Separators (|) are shown to clarify the response. They are not part of the response.
Example 1
Query: <STX>A?PQLV<ETX><checksum>
Example 2
Query: <STX>A?13A<ETX><checksum>