Spbusy Instruction - Mitsubishi QJ71C24/-R2 User Manual

9 DEDICATED INSTRUCTIONS

9.7 SPBUSY Instruction

Set Internal device
data (System, user)
Bit Word
(D)
[Instruction
code]
SPBUSY
SPBUSY
Set data
Set data
Function
b15 to
(D) + 0
(D) + 1
9 - 17
This instruction reads the status of data transmission and reception executed with
dedicated instructions.
MELSECNET/H,
MELSECNET/10
File register
Direct J \
Bit
[Executing
condition]
Command
Command
Start I/O signal of the module
Un
(00 to FE: Top two-digit when I/O signals are expressed in 3-digit.)
Head number of devices in which the read communication status is
(D)
stored.
(1) The function reads the execution status of a dedicated instruction directed to a
module designated by the start I/O signal, and stores it in the device designated
by (D) or later.
(2) The execution status is stored in (D) in the form of "1" at the corresponding bit
when the processing of each instruction is started, and "0" when the processing is
completed.
The processing of each instruction is completed when the completion flag of each
instruction is turned from on to off.
b4 b3b2b1 b0
Stores the execution status of ONDEMAND, OUTPUT, PRR, and BIDOUT instructions directed to channel 1.
Stores the execution status of INPUT and BIDIN instructions directed to channel 1.
Stores the execution status of ONDEMAND, OUTPUT, PRR, and BIDOUT instructions directed to channel 2.
Stores the execution status of INPUT and BIDIN instructions directed to channel 2.
Stores the execution status of GETE and PUTE instructions.
(Always stores "0".)
0
(3) The SPBUSY instruction is executed for every scan while the read command is
ON, if the system is executing during ON. And, the instruction will be executed for
a single scan when the read command rises from OFF to ON, if the system is
starting up.
Applicable device
Special module
U \G
Word
G.SPBUSY
GP.SPBUSY
Description
MELSEC-Q
Index register Zn Constant Others
—
(D)
Un
(D)
Un
Set by
User
System
Data type
BIN16 bit
Device name
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