Clock And Runtime Meter; Characteristics Of The Clock Of The Cpus - Siemens SIMATIC S7-300 Series Reference Manual
Cpu specifications
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- Manual (676 pages) ,
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CPUs
1.1.6
Clock and Runtime Meter
Table 1-5 shows the characteristics and functions of the clock for the various
CPUs.
When you assign parameters to the CPU in STEP 7, you can also set functions
such as synchronization and the correction factor(see the STEP 7 online help
system).
Table 1-5
Characteristics of the Clock of the CPUs
Characteristics
312 IFM
Type
Software clock
Manufacturer
setting
Backup
Not possible
Operating hours
-
counter
Number
Value range
Accuracy
... max. deviation per day:
S
with switched
on power
supply
0 to 60_ C
S
with switched
off power
supply
0_C
25_C
40_C
60_C
1-10
313
314
314 IFM
315
Hardware clock (integrated "real-time clock")
DT#1994-01-01-00:00:00
S
Backup battery
S
Accumulator
1
0
0 to 32767 hours
""9s
+2s to -5s
""2s
+2s to -3s
+2s to -7s
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
315-2 DP
316-2DP
318-2
0 to 7
0 to 32767
hours
A5E00111190-01
8
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