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CPU modules
3.1
CPU module CPU550/CPU551
3.1.1
Areas of application
The CPU550/CPU551 processor module can be customized by means of graphic interface
and enables the realization of demanding, highly dynamic automatic control systems.
Use cases include:
● Roll nip controls
● Hydraulic positioning functions
● Strip cooling systems
3.1.2
Control and display elements
LED display
The processor number, states and faults are displayed using a 5x7 dot matrix LED array.
Acknowledge button S1
This button has two functions:
● Clearing the fault display:
● Digital signal input can be evaluated using the ASI function block.
SIMATIC TDC hardware
System Manual, 12/2013, A5E01114865-07
The acknowledge button can be used to clear sporadic or non-critical fault displays on the
5x7 dot matrix LED. An additional fault is displayed after the first one has been
acknowledged.
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