CPU modules
4.1 CPU module CPU555
SIMATIC TDC hardware
86 System Manual, 08/2017, A5E01114865-AL
The size of the user program (compressed to approx. 50 %) that was downloaded to
program memory and the size of free program memory can be viewed in the CFC by
selecting the following menu command:
● PLC / Load / Info
Average load (measured with block PSL) should not exceed 90%, since this may lead to
sporadic overload.
The user program created in CFC is downloaded to program memory. Program memory
features Flash EPROM (2, 4 or 8 MB).
Program memory for user program: See Additional components (Page 82)
LAN interfaces
• Support of distributed I/O
• Operating control and monitoring
• Communication with a PC
• Download function
• TCP/UDP communication with other CPUs
• Set time of day
PROFINET I/O interfaces
1)
• X1 P1 R PN (LAN): 10/100 Mbps
• X1 P2 R PN (LAN): 10/100 Mbps
• X1 P3 PN (LAN): 10/100 Mbps
1) All X1 interfaces have the same IP address
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