Siemens Simatic S7-300 CPU 31xC and CPU 31x S7-300 - Manual (Page 182)

Technical data of CPU 31x
7.4 CPU 315-2 DP
CPU 31xC and CPU 31x, Technical data
7-16
Manual, Edition 08/2004, A5E00105475-05
Technical data
Diagnostic buffer
Yes
• Number of entries (not configurable) Max. 100
Communication functions
PG/OP communication
Yes
Global data communication Yes
• Number of GD circuits 8
• Number of GD packets
–
Sending stations
– Receiving stations
Max. 8
Max. 8
Max. 8
• 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 Yes
• As server Yes
• as client Yes (via CP and loadable FBs)
• User data per request
–
Consistent data
Max. 180 bytes (with PUT/GET)
64 byte (as the server)
S5-compatible communication Yes (via CP and loadable FCs)
Number of connections 16
can be used for
• PG communication
–
Reserved (default)
– Configurable
Max. 15
1
1 to 15
• OP communication
–
Reserved (default)
– Configurable
Max. 15
1
1 to 15
• S7-based communication
–
Reserved (default)
– Configurable
Max. 12
12
0 to 12
Routing Yes (max. 4)
Interfaces
1st interface
Type of interface
Integrated RS485 interface
Physics RS 485
electrically isolated No
Interface power supply
(15 to 30 VDC)
max. 200 mA