Mandatory signals must be connected.
Function blocks with disconnected outputs are not executing and hence
may show improper values on the outputs.
IEC08000258.vsd
1
3
7
8
9
17
16
12
11
10
2
5
6
15
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13
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IEC08000258 V1 EN
Figure 31:
ACT: Function block overview
1
Connection(s)
2
User defined function block name
3
Function block, selected (red)
4
Mandatory signal (indicated by a red triangle if not connected)
5
Function block name
6
Function block, locked (red)
7
ANSI symbol
8
Inverted output
9
Hardware, binary output channel
10 Hardware, analog input channel
11 User defined signal name
12 Hardware, binary input channel
13 Execution order
14 Cycle time
15 Instance number
16 Inverted input
17 Signal description note
1MRK 511 245-UUS -
Section 5
Protection and control engineering
650 series ANSI
55
Engineering Manual
