MODULAR SAFETY INTEGRATED CONTROLLER MOSAIC
110 8540780 • 10/07/2020 • Rev.38
There are two types of reset: Manual and Monitored. In selecting the Manual option only signal
transition from 0 to 1 is verified. If the Monitored option is selected, the double transition from 0 to
1 and back to 0 is verified.
Enable Status: If selected, enables the connection of the current OSSD state to any point on the
schematic.
External K time monitoring: If selected, enables the setting of the time window within which the
external feedback signal is to be monitored (according to following output conditions).
With high level (TRUE) OUTPUT, the FBK signal must be at low level (FALSE) within the set time.
Otherwise, OUTPUT is set to low level (FALSE) and the error is indicated on the master M1 by the
flashing CLEAR LED corresponding to the OSSD in error.
Enable Error Out: If selected, enables the ERROR OUT output. This output is set to high level
(TRUE) when an external FBK error is detected.
The Error Out signal is reset in case of one of the following events:
1. Switching on and switching off of system.
2. Activation of the RESET M1 operator.
Example of OSSD with correct Feedback signal:
In this case ERROR OUT=FALSE
Example of OSSD with incorrect Feedback signal
(k external time exceeded):
In this case ERROR OUT=TRUE
OSSD feedback unconnected: If selected, the feedback must not be connected. If not selected the
feedback must be connected directly to 24V or through the series of NC contacts of K1/K2.
This parameter is only applicable to module MO4LHCS8 firmware version >0.1
No test pulses: if selected disables the
on the OSSD safety outputs (refer to
“IMPORTANT NOTE CONCERNING OSSD
SAFETY OUTPUTS”, page 38).
Selecting “no test pulse” causes the loss of the
safety function of the Single-Double OSSD
(function block grey colored). As a
consequence the SIL will be downgraded.
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