Technical data of CPU 31x
7.8 CPU 319-3 PN/DP
CPU 31xC and CPU 31x, Technical Data
Manual, 01/2006 Edition, A5E00105475-06
7-43
Technical data
Analog channels
• Inputs
4096
• Outputs
4096
• Inputs, central
256
• Outputs, central
256
Removal
Racks, Max. 4
Modules per rack, Max. 8
Number of DP masters
• Integrated
2
• Via CP
4
Operable function modules and communication
processors
• FM
8
• CP (PtP)
8
• CP (LAN)
10
Time
Clock
• Hardware clock
Yes
• Buffered
Yes
• Buffered period
Typically 6 weeks (at an ambient temperature of
104 °F)
• 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.
• Behavior of the realtime clock after POWER
ON
The clock continues running after POWER OFF.
• Accuracy
Deviation per day: < 10 s
Operating hours counter
• Number
4
• Number
0 to 3
• Value range
0 to 2
31
hours
(using the SFC 101)
• Granularity
1 hour
• Retentive
Yes; must be manually restarted after every
restart
Time synchronization
• supported
Yes
• In the AS
Master/slave
• On MPI
Master/slave
• on Ethernet via NTP
Yes (as client)
S7 message functions
Number of stations that can be logged on for
signaling functions
32
(depends on the number of connections
configured for PG / OP and S7 basic
communication)
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