CPU modules
4.1 CPU module CPU555
SIMATIC TDC hardware
76 System Manual, 08/2017, A5E01114865-AL
Note
Note the following for operation with modules:
•
Operation of the CPU555 with the CP5100 and CP50M0 modules that are being phased
out is not possible.
Use of a CP50M1 in combination with a CPU555 is only possible as of a firmware version
≥ 4
Use of a CP51M1 in combination with a CPU555 is only possible as of a functional status
≥ 8
Use of a CP52A0 with article number 6DD1660-0BH0 in combination with a CPU555 is
only possible as of a functional status ≥ 9
Use of a CP53M0 in combination with a CPU555 is only possible as of a functional status
≥ 9
Use of an SM500 in combination with a CPU555 is only possible as of a functional status
≥ 13
Control and display elements
LED display
The processor number, states and faults are displayed using a 5x7 dot matrix LED array.
This button has two functions:
● Clearing the fault display:
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.
● Digital signal input can be evaluated using the
function block.
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