Siemens Simatic S7-300 Technical Data Manual page 127

Cpu 31xc and cpu 31x
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Technical data
Communication functions
PG/OP communication
Global data communication
Number of GD circuits
Number of GD packets
Sending stations
Receiving stations
Length of GD packets
Consistent data
S7 basic communication
User data per request
Consistent data
S7 communication
As server
as client
User data per request
Consistent data
S5-compatible communication
Number of connections
can be used for
PG communication
Reserved (default)
Configurable
OP communication
Reserved (default)
Configurable
S7-based communication
Reserved (default)
Configurable
Routing
Interfaces
1st interface
Type of interface
Physics
electrically isolated
Interface power supply (15 to 30 VDC)
Functionality
MPI
PROFIBUS DP
Point-to-point communication
CPU 31xC and CPU 31x, Technical data
Manual, Edition 08/2004, A5E00105475-05
CPU 313C-2 PtP
CPU 313C-2 PtP
Yes
Yes
4
Max. 4
Max. 4
Max. 4
max. 22 bytes
22 bytes
Yes (server)
max. 76 bytes
76 bytes (for X_SEND or X_RCV)
64 bytes (for X_PUT or X_GET as the server)
Yes
Yes (via CP and loadable FBs)
max. 180 bytes (with PUT/GET)
64 bytes
Yes (via CP and loadable FCs)
Max. 8
Max. 7
1
from 1 to 7
Max. 7
1
from 1 to 7
Max. 4
4
from 0 to 4
No
CPU 313C-2 PtP
Integrated RS485 interface
RS 485
No
Max. 200 mA
Yes
No
No
Technical data of CPU 31xC
6.4 CPU 313C-2 PtP and CPU 313C-2 DP
CPU 313C-2 DP
CPU 313C-2 DP
Max. 4
CPU 313C-2 DP
6-17

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