Siemens S7-300 appendix Routing, GD resources of the CPUs, CPU 315-2 DP, 315-2 PN/DP

Communication

3.2 Communication services

GD resources of the CPUs

Table 3-4	GD resources of the CPUs
Parameters		CPU 31xC, 312, 314	CPU 315-2 DP,
			315-2 PN/DP, 317
Number of GD circuits per CPU		Max. 4	Max. 8
GD packets transmitted per GD circuit		Max. 1	Max. 1
GD packets transmitted by all GD circuits		Max. 4	Max. 8
GD packets received per GD circuit		Max. 1	Max. 1
GD packets received by all GD circuits		Max. 4	Max. 8
Data length per GD packet		max. 22 bytes	max. 22 bytes
Consistency		max. 22 bytes	max. 22 bytes
Min. reduction ratio (default)		1 (8)	1 (8)

3.2.7Routing

Properties

STEP 7 V5.1 + SP4 or higher allows you to access your S7 stations on all subnets with your PG/PC, for example, to

•download user programs

•download a hardware configuration, or

•perform debugging and diagnostic functions.

Note

When the CPU is used as intelligent slave, the routing function is only available when the DP interface is set active. IN STEP 7, set the Test, Commission Routing check box on the properties dialog of the DP interface. For detailed information, refer to the Programming with STEP 7 manual, or directly to the STEP 7 Online Help

3-10	CPU 31xC and CPU 31x, Technical data
	Manual, Edition 08/2004, A5E00105475-05