ACC Utilities Reference Guide

64 Chapter2
TTGEN-ZCOMSystemTableGenerator
Creating the TTGEN Configuration File
Ldata
This subparameter allows the user to set up and initialize a buffer of
values in a Logical-Data area of the logical terminal table (LTT)
extension area.
The Ldata subparameter is related to the previous Lterm or Term
parameter that came before it. In other words, t he affected LTT
extension area belongs to the LTT created for the previous Lterm or Term
parameter. An Ldata subparameter after a Pterm parameter will cause
anerrortobereported.
Note that a Logical-Data area must be defined before you can use the
Ldata parameter. Ldata canbeoffsetanywherewithinitsLogical-Data
area. Multip le Ldata areas in the same Logical-Data area must not
overlap or go beyond the end of the Logical-Data area.
Ldata is associatedwith the Term or Lterm parameter previously defined
before it. Term and Lterm entries have application numbers associated
with them. Ldata resides in a Logical-Data area that has an application
number associated with it. The application number of this Logical-Data
area and the Term or Lterm parameter must match, or the application
number of the Logical-Data area must be zero (0). Else an error will be
reported.
To set up data within the LTT extension area or Logical-Data area,
“location”, “format” and “data” must be specified as follows:
Ldata location format data, data, ...
<location> specifies where to place the data, and is either:
• a number which specifies the byte offset (starting
from 0) from the beginning of the LTT extension
area
•ortheform:
NAME:xxxxxxx:offset
<xxxxxx> a name defined inLogical-Datain the
Configuration section
<offset> thebyteoffsetrelativetoregion
“xxxxxx”