Specifications

97
General Information Section 11-1
11.1 General Information
The operating terminals allow for a simple connection to PLCs of the AEG Modicon
series.
The operating terminal is connected to the interface of the ALU.
The data communication on the interface is handled by a protocol which is based
on the KS-functions of the Modicon series.
Communication is possible with any system implementing the KS-functions based
on the Modicon series:
AEG-MIKRO PU-interface / RS232
AEG-120 PU-interface / RS232
AEG-250 PU-interface / RS232
The software components of the system are fully adapted to the parameters and
marginal conditions of the interface.
This offers the user the following advantages:
- Random write and read access to any data within the PLC. Data of existing PLC
programs can be displayed and modified directly in the operating terminal. It is
not necessary to adapt the PLC program to the operating terminal in any re-
spect. It is not required that communications data be stored in a specified ad-
dress area or data type area.
- The operating terminal automatically polls the freely definable data areas for
cyclic data.
- No configuration required within the PLC.
- The protocol is handled entirely by the firmware of the PLC. A PLC program
(function blocks, etc.) in the PLC is not required for the handling of the communi-
cation.
- The protocol provides error control. Transmission errors are detected and, if
possible, eliminated by repeating the transmission. An electrically isolated,
noise-immune interface hardware in accordance with the RS232 standard per-
mits the application even in a harsh industrial environment.
- The parameters of the interface SER1 are assigned in the programming soft-
ware in a protocol-specific manner and are stored in the application description.
Modifying of the parameters is also possible in the setup mask or any other I/O
mask of the terminal at any time.
- The programming system provides a maximum of support to the operator in
programming the operating terminal. The definitions (abbreviations) used here
are identical with the definitions used within the PLC program.