Siemens Simatic S7-300 Technical Data Manual page 181

Technical data
Number of function modules and communication
processors you can operate
•
•
•
Time-of-day
Real-time clock
•
•
•
•
Operating hours counter
•
•
•
•
Clock synchronization
•
•
S7 signaling functions
Number of stations that can log in for signaling
functions (e.g. OS)
Process diagnostics messages
•
Testing and commissioning functions
Status/control variables
•
•
Forcing
•
•
Block status
Single step
Breakpoints
CPU 31xC and CPU 31x, Technical data
Manual, Edition 08/2004, A5E00105475-05
FM
CP (PtP)
CP (LAN)
Buffered
Buffered period
Behavior of the clock on expiration of the
buffered period
Accuracy
Number
Value range
Granularity
Retentive
In the PLC
On MPI
Simultaneously enabled interrupt S blocks
Variables
Number of variables
Of those as status variable
–
Of those as control variable
–
Variables
Number of variables
Technical data of CPU 31x
Max. 8
Max. 8
Max. 10
Yes (HW clock)
Yes
Typically 6 weeks (at an ambient temperature of
104 °F)
The clock keeps running, continuing at the time-
of-day it had when power was switched off.
Deviation per day: < 10 s
1
0
2 hours
31
(if SFC 101 is used)
1 hour
yes; must be manually restarted after every
restart
Yes
Master
Master/slave
16
(depends on the number of connections
configured for PG / OP and S7 basic
communication)
Yes
40
Yes
Inputs, outputs, memory bits, DBs, timers,
counters
30
30
14
Inputs/Outputs
Max. 10
Yes
Yes
2
7.4 CPU 315-2 DP
7-15