Q Corresponding Serial Communication Module User's Manual

3 SPECIFICATIONS

MELSEC-Q

3.5 Dedicated Instruction List

The following table lists dedicated instructions that can be used in the Q series C24.

Classification Instruction

ONDEMAND

OUTPUT

INPUT

BIDOUT

BIDIN

For data communication

SPBUSY

CSET

Setting value registration/ reading

BUFRCVS

PRR

PUTE

GETE

PLC CPU monitoring instructions

CSET

Initial value setting instruction

Mode switching instruction

UINI

Description

Sends data with the on-demand function

Sends designated number of data

Receives data (reads received data)

Sends data

Receives data (reads received data)

Reads the status of data sent/received with each dedicated instruction

Allows clearing data received up to the present without interrupting the data transmission processing.

Receives data with an interrupt program (reads received data)

Sends data with user frames using transmission schedule table

Stores user frames in flash ROM of the Q series

C24 (writing)

Reads user frames stored in flash ROM of the Q series C24

Performs PLC CPU monitoring registration

Cancels PLC CPU monitoring

For PLC

CPU monitoring function

Sets the unit for the number of communication data (words/bytes) and the data communication area

Changes the mode, transmission specifications and host station No. of the Q series C24.

: Available : Not available

Protocol

MC Non Bi

Reference section

Chapter 9

Chapter 17 of

User's Manual

(Application )

Abbreviations used in the

Protocol column

MC : MC protocol

Non : Non procedure protocol

Bi : Bidirectional protocol

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