Table 14: FB Name: PROFISAFESTACK
Name Data Type Initial Value Description, Parameter Values
VAR_INPUT
activate_FV_C BOOL FALSE Command (= TRUE) to activate fail-safe values in
F-Device or (= FALSE) for normal F-Device oper-
ation
OA_C BOOL FALSE Command (= TRUE) for operator acknowledge-
ment and resume of safety function by F-Device
iPar_EN_C BOOL FALSE This variable TRUE allows a safety control pro-
gram to switch the F-Device into a mode during
which it will accept iParameters. This mode is not
supported by AC500-S Safety I/O modules
(DI581-S, DX581-S and AI581-S)
pIODesc POINTER NULL Internal input parameter (Internal use only!)
VAR_OUTPUT
cons_nr_R BOOL FALSE This parameter is for debugging purposes
only.
It is set when the F-Device has reset its consecu-
tive number counter in PROFIsafe communication
[3].
Toggle_d BOOL FALSE This parameter is for debugging purposes
only.
It is a device-based Toggle Bit indicating a trigger
to increment the virtual consecutive number within
the F-Host [3].
FV_activated_S BOOL FALSE With input devices this variable indicates if TRUE
that the driver is delivering fail-safe values "0" to
the F-Host program for every input value.
With output devices this variable indicates if
TRUE that every output is set to fail-safe values
"0" (default behavior) or F-Output device specific
value controlled by the "activate_FV" signal [3].
OA_Req_S BOOL FALSE This variable indicates a request for acknowl-
edgement prior to the resumption of a safety func-
tion. In case the F-Host driver or F-Device detects
a communication error or F-Device fault, fail-safe
values will be activated. F-Device driver then sets
the variable OA_Req_S (= TRUE) as soon as the
fault/error has been eliminated and operator
acknowledgement is possible. Once the acknowl-
edgement occurred (OA_C = TRUE) the F-Device
driver will reset the request variable OA_Req_S
(= FALSE) [3].
Configuration and programming
AC500-S Libraries > SafetyBase_PROFIsafe_AC500_V22_Ext.lib
30.03.2017AC500-S232
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