User`s manual

369
CHAPTER 17 DEDICATED INSTRUCTIONS
17
17.1 Dedicated Instruction List and Available Devices
CHAPTER 17 DEDICATED INSTRUCTIONS
Dedicated instructions are used to simplify programming when using the intelligent functional module functions.
Among the dedicated instructions for the QJ71C24N(-R2/R4) and QJ71C24(-R2) explained in this manual, this chapter
focuses on the instructions that can be used for QCPU.
There are restrictions on the function version and the serial number of the QJ71C24N(-R2/R4) and QJ71C24(-R2) that
can use the dedicated instructions.
For details, refer to the Q Corresponding Serial Communication Module User's Manual (Basic).
17.1 Dedicated Instruction List and Available Devices
(1) Dedicated instruction list
The following table lists the dedicated instructions explained in this chapter.
The user should not change data (control data, request data, etc.) designated by a dedicated instruction until the execution
of that instruction is completed.
*1 To change the following values preset in the buffer memory for use of dedicated instructions, use GX Configurator-SC or
execute the CSET instruction (Initial setting) before starting data exchange. ( Page 384, Section 17.4)
• Word/byte units designation (address: 96H/136H)
• Transmission buffer memory head address designation (address: A2H/142H)
• Transmission buffer memory length designation (address: A3H/143H)
• Receive buffer memory head address designation (address: A6H/146H)
• Receive buffer memory length designation (address: A7H/147H)
The dedicated instructions are executed based on the values preset in the buffer memory at module startup or those that
have been changed by the CSET instruction (Initial setting).
Application
Dedicated
instruction
Functional description Reference section
Data transmission/reception
BUFRCVS
*1
Receives data by an interrupt program during data communication via the
non procedure protocol or bidirectional protocol.
Page 371, Section
17.2
PRR
*1
Employs user frames to perform data communication via the non procedure
protocol according to the contents defined in the transmission user frame
designation area.
Page 393, Section
17.6
Setting the units of communication
data count
CSET
Sets the units (word/byte) of transmission/reception data count.
Page 384, Section
17.4
The programmable controller CPU
monitoring function
Registers/cancels programmable controller CPU monitoring in order to use
the programmable controller CPU monitoring functions.
Page 375, Section
17.3
Registration/reading of user frames to
Flash ROM
PUTE Registers a user frame.
Page 398, Section
17.7
GETE Reads a user frame.
Page 389, Section
17.5
Mode switching UINI
Changes the mode, transmission specifications and host station No. of the Q
series C24.
Page 402, Section
17.8