Siemens Simatic S7-300 CPU 31xC and CPU 31x S7-300 - Manual (Page 133)

Technical data of CPU 31xC
6.5 CPU 314C-2 PtP and CPU 314C-2 DP
CPU 31xC and CPU 31x, Technical data
Manual, Edition 08/2004, A5E00105475-05
6-23
Technical data
CPU 314C-2 PtP CPU 314C-2 DP
Number of function modules and
communication processors you can
operate
• FM Max. 8
• CP (PtP) Max. 8
• CP (LAN) Max. 10
Time-of-day CPU 314C-2 PtP CPU 314C-2 DP
Real-time clock Yes (HW 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
Clock synchronization Yes
• In the PLC Master
• On MPI Master/slave
S7 signaling functions CPU 314C-2 PtP CPU 314C-2 DP
Number of stations that can log in for
signaling functions (e.g. OS)
Max. 12
(depends on the number of connections configured for PG / OP and S7 basic
communication)
Process diagnostics messages Yes
• Simultaneously enabled interrupt S
blocks
Max. 40
Testing and commissioning functions CPU 314C-2 PtP CPU 314C-2 DP
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
Max. 30
Max. 30
Max. 14
Forcing Yes
• 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