Siemens Simatic S7-300 Technical Data Manual page 120

Technical data of CPU 31xC
6.3 CPU 313C
Technical data
Address areas (I/O)
Total I/O address area
I/O process image
Digital channels
•
•
Analog channels
•
•
Assembly
Racks
Modules per rack
Number of DP masters
•
•
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 be logged on for
signaling functions
6-10
of those local
Integrated channels
of those local
Integrated channels
Integrated
via CP
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
max. 1024 bytes/1024 bytes
(can be freely addressed)
128 bytes/128 bytes
Max. 1016
Max. 992
24 DI / 16 DO
Max. 253
Max. 248
4 + 1 AI / 2 AO
Max. 4
max. 8; max. 7 in rack 3
None
Max. 2
Max. 8
Max. 8
Max. 6
Yes (HW clock)
Yes
Typically 6 weeks (at an ambient temperature of
40 °C)
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
Max. 8
(depends on the number of connections
configured for PG / OP and S7 basic
communication)
CPU 31xC and CPU 31x, Technical data
Manual, Edition 08/2004, A5E00105475-05