EUCHNER MSC, Operating Instructions, Installation And Use

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2121331-04-04/19 (Translation of the original operating instructions)
Operating Instructions
Modular Safety Control System MSC
EN
9.4.7.5. MUTING OVERRIDE
The OVERRIDE function is necessary if the machine stops after erro-
neous sequences of the muting activation and material is occupying
the hazardous opening.
This process activates the OUTPUT output and in this way makes it
possible to remove the material that is blocking the opening.
The Muting Override operator must be connected after the Muting
operator ("T", "L", "SEQ", "Con") (OUTPUT output on the MUTING ("T",
"L", "SEQ", "Con") connected directly to the INPUT input on the Muting
Override).
The operator make it possible to override the directly connected
muting input.
The "Override" operator can only be activated if muting is not active
(INPUT = "0") and at least one muting sensor (or the light grid) is
occupied.
Figure 182: Muting override
The override function ends as soon as the light grid and the muting sensors are clear again. The OUTPUT output switches
to logical "0" (FALSE).
The override function can be started either by state control or edge control.
Start of the override with state: This function is used if the override command (OVERRIDE = 1) is to be active during all
subsequent processes. However, a further override function can only be activated if the command is deactivated and is
then activated again.
If the light grid and the sensors are cleared (not occupied) or if the time is exceeded, the override is ended without the need
for further commands.
Start of the override with edge: The override function is activated by the rising edge on the Override input (OVERRIDE = 1).
The override function is ended if the light grid and the sensors are cleared (not occupied) or on timeout.
The override function can only be restarted if the override enable is activated again (OVERRIDE = 1).
Parameter
NOTICE
With Occupied Sensors: Must be selected for sequential muting, "T" muting and simultaneous muting.
With "L" muting this option is
not
allowed to be selected.
¨
Otherwise a warning will be output during the compiler phase and in the report.
¨
The user must take additional safety measures while the override is active.
Conditions to be checked on activating the override function
"With Occupied Sensors"
selected
Sensor occupied Light grid occupied Input Override Output
X X – 0 1 1
–
– X 0 1 1
X – 0 1 1
X X 0 1 1
Table 74: Status table on usage of the override function