Specifications

Technical Description Section 3-2

3.2 Technical Description

The interfacing of the operating terminal to the Mitsubishi-FX Series- PLCs is ef-

fected by means of the FX protocol.

The FX protocol allows random read and write access to all PLC (programmable

logic controller) data. Any byte-structured data types can also be accessed in bit-

mode. The size of the address area depends on the respective PLC.

3.3 Protocol parameters Mitsubishi FX

The parameters of the interface SER1 are set to the following values:

Baud rate: 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 375000,

500000 Baud

Parity: none, even, odd

Data length: 5, 6, 7, 8 bits

Stopbits: 1, 1.5, 2

Handshake: No Handshake, Hardware, Software

The default parameters of the programming software are printed in bold.

3.3.1 Parameter Maximum Waiting Time for Response

This timer indicates the length of time that the operating terminal (master) will wait

for the response from the PLC (slave).

Permitted values are in the range of 0 ms to 65535 ms.

The default value is 5000 ms.

3.3.2 Parameter Delay Until Connection Setup

Speciﬁes the period of time that the terminal allows to elapse after an unsuccessful

attempt to establish the communication and before making another attempt.

Permitted values are in the range of 5000 ms to 255000 ms.

The default value is 10000 ms.

3.4 Data Types

Type Description Access

S Step ﬂag operand (status) access in bit and byte mode

X Inputs access in bit and byte mode

Y Outputs access in bit and byte mode

M Flags access in bit and byte mode

T Timer ﬂags access in bit and byte mode

T Time Value access in word mode

C Count Flags access in bit and byte mode

C Count Values access in word (double word) mode

M Flag access in bit and byte mode

(also Special Flag)

D Data Register access in word (double word) mode

(also Special Data Register)