Appendix AAPI Commands

 

 

Q

- Set Query Terminator

 

 

 

 

 

 

TYPE

System

 

 

 

EXECUTION

Deferred

 

 

 

SYNTAX

Qresp,

Set the query terminators with the following parameters: resp is the

 

 

hll,

response terminator, hll is the channel terminator, scan is the terminator

 

 

scan,

which follows each scan output, and block is the terminator which follows

 

 

block,

each trigger block output.

 

 

sep

sep determines whether or not a separator character should be used. Valid

 

 

 

options for sep are: 0 - Place no separators in returned buffered scan data

 

 

 

when it is read, and 1 - Place a separator whose value is determined by the

 

 

 

current Set User Terminator (V) command setting into the returned buffer

 

 

 

data when it is read.

 

 

 

Q?

Query current terminator settings.

 

DESCRIPTION

The Set Query Terminator (Q) command is used to set the following query terminators:

resp: This argument specifies the response terminator for general purpose queries issued by the controller. These queries are queries that do not request High/Low/Last or Acquisition Buffer data. This terminator is used in all query responses unless the query refers to data in the High/Low/Last registers or the Acquisition Buffer. In these cases, these types of queries have separate terminators as described below.

hll: This argument specifies the channel terminator to be used for queries which request data residing in the High/Low/Last registers. When this terminator is specified, the terminator will be inserted between each channel response when a High/Low/Last register query request is made. The queries that request High/Low/Last register data are U4, U5, U13, and R#. Remember, the Read Last Readings (R#) command is an HLL register query.

scan: This argument specifies the terminator which will follow each scan that is output when a query request is made for Acquisition Buffer data. When a query request is made for Acquisition Buffer data, this terminator will be used to terminate each scan as it is output to the interface. This will be true except for the last scan in the block. In this case, the trigger block terminator will be used to terminate the scan and the block. The only query command which requests Acquisition Buffer data is the Read Buffered Data (R) command.

block: This argument specifies the terminator which will follow each trigger block that is output when a query request is made for Acquisition Buffer data. When a query request is made for Acquisition Buffer data, this terminator will be used to terminate each trigger block as it is output to the interface. This terminator will be in effect during Read Buffer Data (R) commands. It should be noted that the last scan in the trigger block to be output will be terminated by the defined trigger block terminator rather than the scan terminator.

Each of the above four arguments may be defined with one of the following terminator types, where USER is the user-defined terminator corresponding to the numeric (ASCII) value val, as defined by the Set User Terminator (V) command:

Terminator Type

Terminator Description

 

IEEE-488

Serial

0

(None)

(None)

1

CR LF/EOI

CR LF

2

CR LF

CR LF

3

LF CR/EOI

LF CR

4

LF CR

LF CR

5

CR/EOI

CR

6

CR

CR

7

LF/EOI

LF

8

LF

LF

9

USER/EOI

USER

10

USER

USER

sep: This argument specifies whether or not a separator character should be placed between each returned reading in the buffer scan data. This field will be in effect during Read Buffer Data (R) commands. The value of this field is interpreted as follows: 0 - Place no separators in returned buffered scan data when it is read, and 1 - Place a separator, whose value is determined by the current Set User Terminator (V) command setting, into the returned buffer data when it is read.

ChartScan User’s Manual

A-47

Page 173
Image 173
Omega Vehicle Security 1400 manual Set Query Terminator, CR LF/EOI LF CR/EOI USER/EOI User, None

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