Commissioning (software)
5.8 Commissioning the Fail-safe Functions
Control Units CU240S
Operating Instructions, 11/2006, A5E00766042B AA
5-63
Commissioning parameters regarding fail-safe functions
Parameters regarding fail-safe functions can only be accessed on a Control Unit with fail-
safe functions, on a Standard CU this parameters are not available. For safety reason
parameters are handled by pairs and stored on two separate processors within the CU with
fail-safe functions.
When commissioning of fail-safe functions is completed, checksums for each processor data
are created. These checksums are permanently compared. If they differ, the inverter initiates
a latched safe torque off (LSTO) state and stops the system.
The access level of the fail-safe function parameters is 3, therefore set P0003 = 3, when
using an OP.
To enter the commissioning mode for fail-safe functions set parameter P0010 = 95.
When the safety commissioning mode is initiated a password must be set in parameter
P9761. The default password for the system is 12345, it is highly recommended that this
password is changed to ensure complete security of the fail-safe function parameters. More
detailed description of this process is given in the following flow charts.
The commissioning process of fail-safe functions would normally be accomplished with the
use of either the STARTER software or the optional Operator Panel (OP).
When a parameter is modified, the relevant value is transmitted to the relevant processor in
the CU. The value is transmitted back to the user interface and can be checked by the
processor and the user for correctness.
To complete commissioning of fail-safe functions use parameter P3900 = 10, which accepts
all the changes to the fail-safe parameters. All values stored on both processors are checked
and if no discrepancies are found the inverter state will change from "safety commissioning"
to "ready".
If, however, a discrepancy is found safety commissioning can not be finished. The fault
number will be shown in r0947. In this case interrupt the safety commissioning with P3900 =
11 to reload to the former stored settings. To reset all fail-safe parameters to their default
values set P0970 = 10.
If a fault is made during safety commissioning, and the system is in an undefined state, it is
recommended to perform a safety reset with P0970 = 10.
When changing fail-safe parameters, each parameter will be written to the P1 processor and
its equivalent parameter to the P2 processor, for example:
● P9603 – enables the selection of the required safe digital input terminals or PROFIsafe
communications for P1 processor.
● P9803 – enables the selection of the required safe digital input terminals or PROFIsafe
communications for P2 processor.
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