Specifications

105
Technical Description Section 12-2
12.1 General Information
The operating terminals allow for a simple connection to every JETTER PASE-E
and JETTER PASE-Mikro controller.
The operating terminal is connected to the RS232 programming unit interface.
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 read and write 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 in any respect since it is not required that
communications data be stored in a specified address 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 operating system of the communications
module. A PLC program is not required for the handling of the communication.
- The parameters of the interface SER1 are stored in the application description.
Modifying of these parameters is possible in the setup mask or each 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 (e.g. M3 = flag 3).
12.2 Technical Description
The interfacing of the operating terminal to JETTER PASE-E and JETTER PASE-
Mikro controllers is effected by means of the protocol PASE or PCOM5.
Both the PASE and the PCOM5 protocol permit access to one variable at a time
only. To allow access to linear blocks of data, the communications driver of the
operating terminal automatically segments block-oriented access procedures into
separate accesses to the PLC.
The inputs of the PLC can be accessed via the protocol in the read-mode only.
The data type 32-Bit-Real-Register (Register address 8960 to 9215) is only avail-
able with the JETTER PASE-E controller.
Access to alphanumeric text-variables is possible via the data type T (24-Bit-Text-
Register) only. During such accesses, the terminal will not carry out any length
information management or status information management, respectively. The
text data are located in the 3-byte register in a flushed manner.