
IEC08000304.vsd
IEC08000304 V1 EN-US
Figure 37: ACT: Warning message by signal mismatch for a connection
5.1.7
Hardware channels
GUID-3455B27F-8F45-4510-A376-0F6C8B6BE3BF v3
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
. The connection is also represented in SMT
with a cross mark. Hardware channels are always visible in SMT.
Supported hardware channels are:
•
Binary input channels
•
Binary output channels
•
Analog input channels
A hardware input channel can be used as often as it is needed. A hardware binary output
channel is taken from the list of available channels when a new channel is requested. That
prevents for using a hardware binary output channel twice. As an example, see
1MRK 511 284-UEN B
Section 5
Protection and control engineering
650 series
47
Engineering manual
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