Siemens CPU 312 - Page 188

Technical data of CPU 31x
7.5 CPU 315-2 PN/DP
CPU 31xC and CPU 31x, Technical Data
7-22 Manual, 01/2006 Edition, A5E00105475-06
Technical data
Test and startup 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
Force
• 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
Open IE communication via TCP/IP Yes (via integrated PROFINET interface and
loadable FBs, Max. 8 connections)
PG/OP communication Yes
Global data communication Yes
• Number of GD circuits
8
• Number of GD packets
– Sender
– Receiver
Max. 8
Max. 8
Max. 8
• Size of GD packets
– Consistent data
Max. 22 bytes
22 bytes
S7 basic communication Yes
• User data per job
– Consistent data
Max. 76 bytes
76 bytes
S7 communication Yes
• As server
Yes
• As client
Yes (via integrated PN interface and loadable
FBs, or even via CP and loadable FBs)
• User data per job
– Consistent data
See the STEP 7 Online Help,
Common
parameters of SFBs/FBs and SFC/FC of the S7
communication)
S5compatible communication Yes (via CP and loadable FCs)
Number of connections 16
Can be used for
• PG communication
– Reserved (default)
– Configurable
Max. 15
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