Siemens Simatic S7-300 CPU 31xC and CPU 31x S7-300 - Manual (Page 195)

Technical data of CPU 31x
7.6 CPU 317-2 DP
CPU 31xC and CPU 31x, Technical data
Manual, Edition 08/2004, A5E00105475-05
7-29
Technical data
S7 signaling functions
Number of stations that can be logged on for
signaling functions
32
(depends on the number of connections
configured for PG / OP and S7 basic
communication)
Process diagnostics messages Yes
• Simultaneously enabled interrupt S blocks 60
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
30
Max. 30
Max. 14
Forcing
•
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 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)
76 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)
160 byte (as the server)
S5-compatible communication Yes (via CP and loadable FCs)