ABB REO 517 Applications Manual page 56

46
Logic function blocks
Synchronization with MOL should be used if a signal produced in the slow logic is used
in several places outside this logic, or if several signals produced in the slow logic are
used together outside this logic, and there is a similar need for synchronization.
Figure 23 shows an example of logic, which can result in malfunctions on the output
signal from the AND gate to the right in the figure.
Fast logic
Function 1
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Figure 24 shows the same logic as in figure 23, but with the signals synchronized by the
MOVE function blocks MOFn and MOLn. With this solution the consistency of the sig-
nals can be guaranteed.
Slow logic
Function 2
Function 3
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Fast logic
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