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APPX
Appendix 5 Conversion of the SFC Program
Appendix 5 Conversion of the SFC Program
Below are described the procedure and precautions for converting FX3U/FX3UC projects created with the SFC program into
FX5U/FX5UC projects.
After converting the projects, it may be necessary to adjust the programs (instructions, devices) and parameters.
This chapter describes the SFC program operations and specifications. For information not contained in this
chapter, refer to the following.
GX Works3 Operating Manual
MELSEC iQ-F FX5 User's Manual (Application)
MELSEC iQ-F FX5 Programming Manual (Program Design)
Differences in Specifications After Replacement
The differences in specifications of the SFC program between FX3U/FX3UC and FX5U/FX5UC are shown below.
*1 When the number of steps exceeds 128, a stop error (31B3H) will occur.
*2 When the number of steps exceeds 128, a stop error (31B4H) will occur.
*3 After replacement, the setting is “Initial Start”. To use “Resume Start”, it is necessary to change the parameter and install the optional
battery.
*4 If a reset jump is contained in an FX3U/FX3UC project, the reset jump will be replaced with an end step when the project is replaced
with an FX5U/FX5UC project.
Classification Item FX3U/FX3UC FX5U/FX5UC
SFC program Number of simultaneously activated steps In 1 block 512 steps 128 steps
*1
Whole system 4096 steps 128 steps
*2
SFC operation SFC operation mode when power is turned off
and on or reset
Resume start
*3
Transition control Transition condition Reset jump
*4
SFC control
instructions
Execution of SFC control instructions in interrupt program
Monitor Monitoring by special device SM8046 (STL operation)
SM8047 (STL monitor enabled),
SD8040 to SD8047 (ON state numbers)
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