Call of an SFB in ladder language
(Original Document)
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Introduction
The conversion automatically replaces SFBs with equivalent EFBs (Premium) or DFBs (Modicon M340), insofar as these exist.
Call of an SFB in Ladder
The following table describes the correspondence and possible differences between SFBs and EFBs (Premium) or DFBs (Modicon M340).
PL7
Control Expert
State
SFB
PL7 Timer
Modified
SFB
PL7_3 Timer
Modified
SFB
PL7 Monostable
Modified
SFB
PL7 Counter
Modified
SFB
PL7 Register
(1)
Modified
SFB
PL7 Drum
(2)
Modified
(Premium only)
Note: For Modicon M340, the converter replaces a DRUM SFB with an empty DFB.
Key:
(1)
Depending on the register length, can be converted into PL7_REGISTER_255.
(2)
You must also assign the values of the current step to the DRUM output objects.