Dedicated Instruction List - Mitsubishi QJ71C24/-R2 User Manual

9 DEDICATED INSTRUCTIONS
9 DEDICATED INSTRUCTIONS
Dedicated instructions are used to simplify programming when using intelligent function
module functions.
This chapter describes the dedicated instructions for the Q series C24, which is part of
the functions of the QCPU (in Q mode) explained in this manual.

9.1 Dedicated Instruction List

The following table lists the dedicated instructions explained in this chapter.
Application
On-demand function transmission
Non procedure protocol
communication
Bidirectional protocol
communication
Communication status confirmation SPBUSY
Receive data clear
(1) The user should not change data values (control data, request data, etc.)
(2) Dedicated instructions for the Q series C24 are executed based on the current
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Dedicated
instruction
Sends data using the on-demand function of the MC
ONDEMAND
protocol.
OUTPUT Sends data for the specified data count.
INPUT Reads received data.
BIDOUT Sends data for the designated data count.
BIDIN Reads received data.
Reads the status of data transmission/reception via a
dedicated instruction.
Perform the receive data clear without stopping the
CSET transmission processing during the non procedure
protocol.
POINT
designated by a dedicated instruction until the execution of the dedicated
instruction is completed.
setting values stored in the buffer memory when the module is started.
When it is necessary to change a setting value, change the value by GX
Configurator-SC before starting up the module.
Alternatively, a setting value can be changed via the sequence program using
a CSET instruction before starting up the PLC CPU (See the User's Manual
(Application)).
1) Area of buffer memory assigned as applicable functions for dedicated
instructions.
2) Setting values for data communication
• Word/byte units designation
• Receive complete code
• Received data count
etc.
Description of function
MELSEC-Q
Explanation
page
Section 9.2
Section 9.3
Section 9.4
Section 9.5
Section 9.6
Section 9.7
Section 9.8
9
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