Specifications

General Information Section 3-1

3.1 General Information

The operating terminals allow for a simple connection to every Mitsubishi PLC of

the FX series thus making the operating terminals the perfect man-machine-in-

terface for your Mitsubishi PLC.

The operating terminal is connected to the programming unit interface of the

PLC. An additional communications module is not necessary. The data communi-

cation on the interface is handled by the Mitsubishi FX protocol.

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 respect

since 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 is required in the PLC.

- The protocol is handled entirely by the operating system of the PLC. A PLC

program in the PLC is not required for the handling of the communication.

- The protocol provides error control. Transmission errors are detected and, if

possible, eliminated by repeating the transmission. A noise-immune interface

hardware in accordance with the RS485 interface standard permits the applica-

tion 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 possible in the setup mask or in 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 cor-

responds to ﬂag 3).