Siemens S7-300 appendix CPU 317-2 DP, Technical data S7 signaling functions

			Technical data of CPU 31x
			7.6 CPU 317-2 DP
Technical data
S7 signaling functions
Number of stations that can be logged on for			32
signaling functions			(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		30
	– Of those as status variable		Max. 30
	– Of those as control variable		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			Max. 8
	–	Sending stations	Max. 8
	–	Receiving stations	Max. 8
• Length of GD packets			max. 22 bytes
	–	Consistent data	22 bytes
S7 basic communication			Yes
• User data per request			max. 76 bytes
	–	Consistent data	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			Max. 180 bytes (with PUT/GET)
	–	Consistent data	160 byte (as the server)
S5-compatible communication			Yes (via CP and loadable FCs)

CPU 31xC and CPU 31x, Technical data	7-29
Manual, Edition 08/2004, A5E00105475-05