Siemens CPU 317-2 DP Información Del Producto página 4

Restrictions with SFC 22 "CREAT_DB", SFC 23 "DEL_DB" and SFC 82 "CREA_DBL"
F-DBs can neither be created nor deleted.
Restrictions with SFC 83 "READ_DBL" and SFC 84 "WRIT_DBL"
The target address may not point to an F-DB.
Restrictions when configuring the retentive behavior of data blocks
The configuration of retentive data blocks is not supported for F-DBs.
This means that the current values of the F-DBs will not be retentive in the event of Power OFF/ON and Restart (STOP-
RUN) of the F-CPU. The F-DBs retain the initial values from the loading memory.
In the block properties of the F-DBs, the "Non-Retain" check box is activated and thus grayed out.
Probabilities of Failure
Below are the values for the CPU 317F-2 DP probabilities of failure:
F-compatible CPU 317F-2
DP
6ES7317-6FF04-0AB0
Operation with the safety protector 6ES7195-7KF00-0XA0
WARNING
The safety protector (order number 6ES7195-7KF00-0XA0, product version 01 and 02) unlike other modules, must not be
inserted in the same rack as the F-CPU. This restriction does not apply to safety protector product versions 03 and higher.
Siemens AG
Division Digital Factory
Postfach 48 48
90026 NÜRNBERG
GERMANY
CPU 317F-2 DP, 6ES7317-6FF04-0AB0, Edition 01, as of Firmware V3.3
A5E03435786-02, 03/2011
4
Operation in Low Demand
Mode
low demand mode
(average probability of
failure on demand)
< 4E-05
< 8E-05
Operation in High Demand
or Continuous Mode
high demand/continuous
mode (probability of a
dangerous failure per hour)
< 1E-09
< 1E-09
CPU 317F-2 DP, 6ES7317-6FF04-0AB0, Edition 01, as of Firmware V3.3
Proof-test interval
10 years
20 years
A5E03435786-02, 03/2011