Mitsubishi Electric Eclipse User Manual download pdf (Page 28)

<4> Knowledge Required for Programming

1. Bus interface functions

The bus interface function is a library function dedicated for a C Controller module.

Using this function in a user program allows a C Controller module to easily control MELSEC-Q series

modules.

(1) Opening/closing a bus

To use the functions, open a bus at the start of the program and close the bus at the end of the program.

Functions to open/close a bus

(2) I/O access

1-point access and 1-word access are available.

1) 1-point access: A function that treats 1-point data (ON/OFF of switches and lamps)

Example of 1-point access functions

2) 1-word access: A function that treats 1-word (16 bits) data (numeric values, characters)

Example of 1-word access functions

(3) User LED control

USER LED control and 7-segment LED control are available.

Example of user LED control functions

Name Function

QBF_Open Opens a bus.

QBF_Close Closes a bus.

Point

Open or close a bus (QBF_Open/QBF_Close functions) once at the start of a program and at

the end of a program, respectively.

By using these functions only once, communication performance will be improved.

Name Function

QBF_X_In_BitEx Reads an input signal (X) in units of one point.

QBF_Y_Out_BitEx Outputs an output signal (Y) in units of one point.

QBF_Y_In_Bit_Ex Reads an output signal (Y) in units of one point.

Name Function

QBF_X_In_WordEx Reads an input signal (X) in units of words.

QBF_Y_Out_WordEx Outputs an output signal (Y) in units of words.

QBF_Y_In_WordEx Reads an output signal (Y) in units of words.

Name Function

QBF_ControlLED Controls the "USER" LED of a C Controller module.

QBF_Control7SegLED Controls the 7-segment LED of a C Controller module.

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 59 60

No comments

Mitsubishi Electric Eclipse User Manual Page 28