Siemens Simatic S7-300 Technical Data Manual page 134

Technical data of CPU 31xC
6.5 CPU 314C-2 PtP and CPU 314C-2 DP
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
•
6-24
CPU 314C-2 PtP
CPU 314C-2 PtP
Yes
Yes
4
Max. 4
Max. 4
Max. 4
max. 22 bytes
22 bytes
Yes
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. 12
Max. 11
1
from 1 to 11
Max. 11
1
from 1 to 11
Max. 8
8
from 0 to 8
No
CPU 314C-2 PtP
Integrated RS485 interface
RS 485
No
Max. 200 mA
Yes
No
No
CPU 314C-2 DP
CPU 314C-2 DP
Max. 4
CPU 314C-2 DP
CPU 31xC and CPU 31x, Technical data
Manual, Edition 08/2004, A5E00105475-05