blocks in group 3 must have a higher execution order than the main function block
in group 2.
6.1.6 Configuration parameters
GUID-52044790-0A7C-4D83-8634-887593A903BC v4
6.1.7 Connections and variables
GUID-1564FB6D-2682-49AE-A1D5-8B7F03E4204B v4
A connection is the link or "wire" between function block outputs and inputs.
Rules and methods to do connections:
• Drag a line between two signals.
• Link two signals by using variables.
It is possible to search and replace variable names in ACT.
Connection validation
A connection is only useful and possible between two signals of the same data
type, see Figure 40.
IEC08000304 V2 EN-US
Figure 40: ACT: Warning message by signal mismatch for a connection
6.1.8 Hardware channels
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Hardware channels can only be connected to a function block input or output. A
hardware connection can be established in ACT or SMT. When a hardware channel
is connected a graphical symbol appears in ACT, see Figure 41. The connection is
1MRK 511 398-UEN C Section 6
Protection and control engineering
670 series 2.2 IEC 75
Engineering manual
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