8
Internal Data Types and Structure Section 2-1
2-1 Internal Data Types and Structure
2-1-1 Overview of Internal Operation
This section describes the structure of internal data of an NV-series PT.
The internal data can be largely divided into two parts.
1. System information is exchanged.
System information is constantly exchanged between the PT and PLC, in-
cluding the screen number and backlight color from the PLC, or to notify
the PLC of PT status.
The system information area is stored in an area called the system mem-
ory. System memory must be initialized using the NV-Designer before use.
2. Screen is displayed.
The NV-series PT has multiple screens that contain functional parts select-
ed from the parts libraries. One of the screens can be displayed.
The functional parts specify the desired PLC address and they read/write
data.
NV-series PT
FROM (built-in Flash Memory)
2. Screen is displayed.
Par ts
1. System
information is
exchanged.
Screen number,
backlight color,
etc.
System memory
PLC
Fixed
area
To Next Page
Loading...
