Siemens Simatic S7-300 CPU 31xC and CPU 31x S7-300 - Manual (Page 121)

Technical data of CPU 31xC
6.3 CPU 313C
CPU 31xC and CPU 31x, Technical data
Manual, Edition 08/2004, A5E00105475-05
6-11
Technical data
Process diagnostics messages
Yes
• Simultaneously enabled interrupt S blocks Max. 20
Testing and commissioning functions
Status/control variables
Yes
• Variables Inputs, outputs, memory bits, DBs, timers,
counters
• Number of variables
–
of those as status variable
– of those as control variable
Max. 30
Max. 30
Max. 14
Forcing Yes
• Variables Inputs, outputs
• Number of variables Max. 10
Block status Yes
Single step Yes
Breakpoints 2
Diagnostic buffer Yes
• Number of entries (not configurable) Max. 100
Communication functions
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. 8