AH500 Programming Manual
6-542
6.25.2 Explanation of Task Control Instructions
API
Instruction code Operand Function
2500 SFCRUN S
1
, S
2
, S
3
SFC Run
Device
X Y M S T C HC D L SM SR E K 16# “$” DF
16-bit instruction (7 steps)
Symbol:
S
1
：
Name of the SFC POU
S
2
：
Function code Word
S
3
：
Device address
Explanation:
1. The designated SFC program of S
1
will be activated according to the setups of S
2
.
2. When the instruction is executed, the SFC POU designated by S
1
will be activated only when
the SFC POU is being scanned.
3. Operand:
S
1
defines the name of the SFC POU.
When the designated SFC POU of S
1
is executed, the parameters such as
SFC/STEP/ACTION/TRANSITION of the SFC program will be cleared when S
2
=0 or 1,
and the execution will start according to the value specified in S
2.
S
2
=0, the system will execute the SFC POU from the initial Step.
S
2
=1, the system will execute the SFC POU from the designated Step of S
3
.
S
2
=2, the status and the parameters such as SFC/STEP/ACTION/TRANSITION of the
SFC will NOT be cleared and the system will start executing from where it pauses.
S
3
designates the step to be started in the SFC program of S
1
.
4. The range of S
2
is 0 to 2. When it is out of range, it will be seen as 0.
5. When the state of the SFC POU is RUN, executing this instruction is invalid.
Example:
Set up one LD(ladder) POU and specify its POU name as Main, and 2 SFC POUs with the names of
TestSFC1 and TestSFC2.
1. When the program is executed (RUN), TestSFC1 and TestSFC2 will execute the SFCSTP, and
2 SFC POUs will stop executing.
2. When M0 is set from OFF to ON, TestSFC1/ TestSFC2 POU will execute the SFCRUN*
instructions. Refer to the contents of TestSFC1 and TestSFC2 for execution details of the 2
POUs. When S
2
is set to 0, the status and the parameters of the SFC will be cleared and will
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