Mitsubishi MELSEC LJ71C24, User Manual

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12 DEDICATED INSTRUCTIONS
12.8 G(P).SPBUSY
This instruction reads the status of data transmission and reception executed with
dedicated instructions.
Applicable device
Internal device
(System, user) Link direct device
J \
Setting
data
Bit Word
File register
Bit Word
Intelligent function
module device
U \G
Index register
Zn
Constant Others
(D) —
G.SPBUSY
GP.SPBUSY
(D)
(D)
GP.SPBUSY
G.SPBUSY
Un
Un
Command
Command
[Executing
condition]
[Instruction
code]
Setting data Description Set by Data type
Un
Start I/O signal of the module
(00 to FE: Top two-digit when I/O signals are expressed in 3-digit.)
User BIN16-bit
Setting data
(D)
Head number of devices in which the read communication status is
stored.
System Device name
Function
(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.
(D) + 0
b15 to b4 b3b2b1b0
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.
0
(Always stores "0".)
(D) + 1
Stores the CPRTCL instruction execution status of channel 1.
Stores the CPRTCL instruction execution status of channel 2.
b5 b6
(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.
(4) Simultaneous execution of dedicated instructions
It is possible to execute another instruction during execution of the SPBUSY
instruction and to execute the SPBUSY instruction during execution of another
instruction.