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MELSEC-Q
3 SPECIFICATIONS
3.5 Dedicated Instruction List
The following table lists dedicated instructions that can be used in the Q series C24.
: Available
: Not available
Protocol
Classification Instruction Description
MC Non Bi
Reference
section
ONDEMAND Sends data with the on-demand function
OUTPUT Sends designated number of data
INPUT Receives data (reads received data)
BIDOUT Sends data
BIDIN Receives data (reads received data)
SPBUSY
Reads the status of data sent/received with each
dedicated instruction
CSET
Allows clearing data received up to the present
without interrupting the data transmission
processing.
Chapter 9
BUFRCVS
Receives data with an interrupt program (reads
received data)
For data
communication
PRR
Sends data with user frames using transmission
schedule table
PUTE
Stores user frames in flash ROM of the Q series
C24 (writing)
Setting value
registration/
reading
GETE
Reads user frames stored in flash ROM of the Q
series C24
Performs PLC CPU monitoring
registration
PLC CPU
monitoring
instructions
Cancels PLC CPU monitoring
For PLC
CPU
monitoring
function
Initial value
setting
instruction
CSET
Sets the unit for the number of communication
data (words/bytes) and the data communication
area
Mode switching
instruction
UINI
Changes the mode, transmission specifications
and host station No. of the Q series C24.
Chapter 17 of
User's Manual
(Application )
Abbreviations used in the
Protocol column
MC : MC protocol
Non : Non procedure
protocol
Bi : Bidirectional protocol