Siemens SIMATIC S7-300 Series Reference Manual page 150

CPU Function, depending on CPU and STEP 7 Version
CPU 315-2 DP
CPU 315-2 DP
Direct communication
Equidistance
Activation/deactivation of DP
slaves
Routing
Reading out of slave
diagnosis
Connection resources
From CPU
CPU 312 IFM
CPU 313
CPU 314
CPU 314 IFM
CPU 314 IFM
CPU 315
CPU 315-2 DP
CPU 316-2 DP
... can be reserved for PD communication, OP communication and S7 basic
communication.
In this case, the free communication resources are available for PD/OP/S7 basic
or S7 communication (see also Chapter 1.2).
CPU versions earlier than those referred to above provide a fixed number of
connection resources for the applicable communication functions.
4-8
v 6ES7 315-2AF03-0AB0
and STEP 7 < V 5.x
No
No
No
No
See Figure 2-1 on page 2-8
Order No.
6ES7 312-5AC02-0AB0
6ES7 313-1AD03-0AB0
6ES7 314-1AE04-0AB0
6ES7 314-5AE03-0AB0
6ES7 314-5AE10-0AB0
6ES7 315-1AF03-0AB0
6ES7 315-2AF03-0AB0
6ES7 316-2AG00-0AB0
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
as of 6ES7
315-2AF03-0AB0 and
STEP 7 as of V 5.x
Yes
Yes
Yes
Yes
See Figure 2-2 on page 2-9
As of Version
Firmware Hardware
1.1.0 01
1.1.0 01
1.1.0 01
1.1.0 01
1.1.0 01
1.1.0 01
1.1.0 01
1.1.0 01
A5E00111190-01