7.5.5.4 Reset for Safe Stop 2 function block
Figure 38: Function block view - Reset for Safe Stop 2
W
ith the Reset function block, the requirements of the safety application are fulfilled as
set out by the EN ISO 13849-1 standard for detecting a manual safety stop with a sub‐
sequent request to restart the application.
As soon as the Safe Position and Override active jump addresses are no longer set to High,
the Safe Stop 2 function is initiated.
If the Reset_SS2 input is set to High, the release condition has been met. A reset signal
with a pulse duration of at least 100 ms sets the Enable output to High.
The Enable and Reset required outputs are used in order to use the optional H210.1 Reset
required light by means of the user-defined Lamp reset/restart required function block.
7.5.5.5 Restart for Safe Stop 2 function block
The R
estart function block allows for a graphical distinction to be made between the
function blocks.
As soon as the Release 1 input is no longer set to High, the Safe Stop 2 function is initi‐
ated.
A valid reset sequence at the Reset function block is required in order for a restart to be
triggered.
If the Restart input is set to High, the release condition has been met. The Enable output
is set to High when a restart signal (Restart_SS2) lasts for a pulse duration of at least
100 ms.
The Enable output is linked to the MOC1 logic via an AND function block in order to initi‐
ate the Safe Stop 2 function with the Safe Stop function block. The output is also linked to
the Safe Stop 2 jump address, which notifies other parts of the CPU logic that a Safe Stop
2 request has been issued.
The Enable and Reset required outputs are used in order to use the optional H210.1 Reset
required light by means of the user-defined Lamp reset/restart required function block.
7.5.5.6 Triggering a Safe Stop 2 with additional safety functions
The Safe Stop 2 function can also be triggered by additional safety functions. The
AND f
unction block connects additional safety functions via the Input 2 input, which is
linked to the External_SS2 jump address.
Further topics
•
"Extension and modification", page 19
•
"Configuring additional safety functions", page 49
CONFIGURATION 7
8020941/12O9/2019-08-05 | SICK O P E R A T I N G I N S T R U C T I O N S | Safe Linear Positioning
63
Subject to change without notice