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S7-300 Automation System CPU Specifications: CPU 31xC and CPU 31x
6-16 A5E00105475-03
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Force Yes
• Variable Inputs, outputs
• Number of variables max. 10
Status block Yes
Single sequence Yes
Breakpoint 2
Diagnostic buffer Yes
• Number of entries (not configurable) max. 100
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PG/OP communication Yes
Global data communication Yes
• Number of GD circuits 4
• Number of GD packets max. 4
Sending stations max. 4
Receiving stations max. 4
• Size of GD packets max. 22 bytes
Of those are consistent 22 bytes
S7-based communication Yes
• User data per job max. 76 bytes
Of those are consistent 76 bytes (for X_SEND or X_RCV)
64 bytes (for X_PUT or X_GET as the
server)
S7 communication
• as server Yes
• as Client Yes (via CP and loadable FBs)
• User data per job max. 180 bytes (with PUT/GET)
Of those are consistent 64 bytes
S5-compatible communication Yes (via CP and loadable FCs)
Number of connections max. 8
usable for
• PG communication max. 7
Reserved (Default) 1
configurable from 1 to 7
• OP communication max. 7
Reserved (Default) 1
configurable from 1 to 7
• S7-based communication max. 4
Reserved (Default) 4
configurable from 0 to 4
Routing No
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