Siemens Simatic S7-300 CPU 31xC and CPU 31x S7-300 - Manual (Page 134)

Technical data of CPU 31xC
6.5 CPU 314C-2 PtP and CPU 314C-2 DP
CPU 31xC and CPU 31x, Technical data
6-24
Manual, Edition 08/2004, A5E00105475-05
Technical data
CPU 314C-2 PtP CPU 314C-2 DP
Communication functions CPU 314C-2 PtP CPU 314C-2 DP
PG/OP communication Yes
Global data communication Yes
• Number of GD circuits 4
• Number of GD packets
–
Sending stations
– Receiving stations
Max. 4
Max. 4
Max. 4
• Length of GD packets
–
Consistent data
max. 22 bytes
22 bytes
S7 basic communication Yes
• User data per request
–
Consistent data
max. 76 bytes
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 request
–
Consistent data
max. 180 bytes (with PUT/GET)
64 bytes
S5-compatible communication Yes (via CP and loadable FCs)
Number of connections Max. 12
can be used for
• PG communication
–
Reserved (default)
– Configurable
Max. 11
1
from 1 to 11
• OP communication
–
Reserved (default)
– Configurable
Max. 11
1
from 1 to 11
• S7-based communication
–
Reserved (default)
– Configurable
Max. 8
8
from 0 to 8
Routing No Max. 4
Interfaces CPU 314C-2 PtP CPU 314C-2 DP
1st interface
Type of interface Integrated RS485 interface
Physics RS 485
electrically isolated No
Interface power supply (15 to 30 VDC) Max. 200 mA
Functionality
• MPI Yes
• PROFIBUS DP No
• Point-to-point communication No