Filter
Top Products
Chapter 7 Application Programming • 136 USER MANUAL
Interrogation Commands
The DMC-13X8 has a set of commands that directly interrogate the controller. When these command
are entered, the requested data is returned in decimal format on the next line followed by a carriage
return and line feed. The format of the returned data can be changed using the Position Format (PF),
and Leading Zeros (LZ) command. For a complete description of interrogation commands, see chapter
5.
Using the PF Command to Format Response from Interrogation
Commands
The command, PF, can change format of the values returned by theses interrogation commands:
BL ? LE ?
DE ? PA ?
DP ? PR ?
EM ? TN ?
FL ? VE ?
IP ? TE
TP
The numeric values may be formatted in decimal or hexadecimal* with a specified number of digits to
the right and left of the decimal point using the PF command.
Position Format is specified by:
PF m.n
where m is the number of digits to the left of the decimal point (0 thru 10) and n is the number of digits
to the right of the decimal point (0 thru 4) A negative sign for m specifies hexadecimal format.
Hex values are returned preceded by a $ and in 2's complement. Hex values should be input as signed
2's complement, where negative numbers have a negative sign. The default format is PF 10.0.
If the number of decimal places specified by PF is less than the actual value, a nine appears in all the
decimal places.
Examples:
:DP21 Define position
:TPX Tell position
0000000021 Default format
:PF4 Change format to 4 places
:TPX Tell position
0021 New format
:PF-4 Change to hexadecimal format
:TPX Tell Position
$0015 Hexadecimal value
:PF2 Format 2 places
:TPX Tell Position
99 Returns 99 if position greater than 99
Removing Leading Zeros from Response to Interrogation Commands
The leading zeros on data returned as a response to interrogation commands can be removed by the use
of the command, LZ.
Example - Using the LZ command