Siemens CPU 312C - Page 128

Technical data of CPU 31xC
6.4 CPU 313C-2 PtP and CPU 313C-2 DP
CPU 31xC and CPU 31x, Technical Data
6-16 Manual, 01/2006 Edition, A5E00105475-06
Technical data
CPU 313C-2 PtP CPU 313C-2 DP
Removal CPU 313C-2 PtP CPU 313C-2 DP
Module rack Max. 4
Modules per rack Max. 8; Max. 7 in rack 3
Number of DP masters
• Integrated
No 1
• Via CP
4 4
Operable function modules and
communication processors
• FM
Max. 8
• CP (PtP)
Max. 8
• CP (LAN)
Max. 6
Time CPU 313C-2 PtP CPU 313C-2 DP
Clock Yes (hardware clock)
• Buffered
Yes
• Buffered period
Typically 6 weeks (at an ambient temperature of 40 °C)
• Behavior of the clock on expiration of
the buffered period
The clock keeps running, continuing at the time-of-day it had when power was
switched off.
• Accuracy
Deviation per day < 10 s
Operating hours counter 1
• Number
0
• Value range
2
31
hours
(if SFC 101 is used)
• Granularity
1 hour
• Retentive
Yes; must be manually restarted after every restart
Time synchronization Yes
• In the PLC
Master
• On MPI
Master/slave
S7 message functions CPU 313C-2 PtP CPU 313C-2 DP
Number of stations that can log in for
signaling functions (e.g. OS)
Max. 8
(depends on the number of connections configured for PG / OP and S7 basic
communication)
Process diagnostics messages Yes
• Simultaneously enabled interrupt S
blocks
Max. 20
Test and startup functions CPU 313C-2 PtP CPU 313C-2 DP
Status/control variables Yes
• Variables
Inputs, outputs, bit memories, DBs, timers, counters
• Number of variables
– Of those as status variable
– Of those as control variable
Max. 30
Max. 30
Max. 14
Force Yes
• Variables
Inputs, outputs
• Number of variables
Max. 10