Watlow PPC-2000 - Manual (Page 186)

Chapter 5: LogicPro and Modbus Reference PPC-2000 User’s Guide
160 Watlow Anafaze Doc.# 30002-00 Rev 2.3
A special font or typeface is used to indicate parameter names
and text seen in the AnaWin3 screens.
Figure 5.1 Sample Text
The words Process Variable Low and Input Signal Low represent
parameter names. The words (PV Lo) and (Input Signal Lo) are the
abbreviated terms seen in AnaWin3. These abbreviations are
shown for reference in this chapter only when the AnaWin3
name differs from the listed parameter names.
The PPC-2000 Database
The PPC stores setpoints and other control parameters along
with process variable values and digital I/O states in its
database. The database is analogous to a set of tables.
Parameters form the columns of the tables. AnaWin3, third-
party HMI software, operator interface terminals and LogicPro
programs access these process parameters and data in the
database.
Think of the database as a series of tables. Each table holds the
values of a different set of parameters: analog inputs; channels;
digital I/O; analog outputs; soft integers; soft booleans; and
globals. In each table the columns represent parameters and
the rows represent analog inputs, or channels, or digital I/O
and so on.
For example, in the analog input table, the columns represent
the analog input parameters such as Input Value, Input Type, and
Input Filter. Each row holds the settings of each of these
parameters for a particular analog input.
Table 5.2 Example Database Table
Process Variable Low (PV Lo)
Set this parameter to the value displayed when the signal
is at the level set in
Input Signal Low (Input Signal Lo) .
Input Value Input Type Input Filter
Input 1
Input 2
Input 3 2089 3
2089
2089 44
44 3
3
44