Testable Safety Device - Reer MZERO Installation, Use And Maintenance Manual

TESTABLE SAFETY DEVICE

The TESTABLE SAFETY DEVICE functional block checks the
status of the Inx inputs of a single or double safety sensor,
both NO and NC. Refer to the tables below to check type
of sensor and behaviour.
(single NC)
IN1 OUT
0 0
1 1
(double NC)
IN1 IN2 OUT
0 0 0
0 1 0
1 0 0
1 1 1
* Simultaneity error = the maximum time between switching of the
single contacts has been exceeded.
Parameters
Manual Reset: If selected, enables the reset request after each activation of the device. Otherwise,
enabling of the output follows directly the conditions of the inputs. Reset may be of two types:
Manual and Monitored. Selecting the Manual option, only transition of the signal from 0 to 1 is
checked. If Monitored is selected, double transition from 0 to 1 and return to 0 is checked.
➔
If Reset is enabled, the input consecutive to those used by the functional block must be used.
For example: If inputs 1 and 2 are used for the functional block, input 3 must be used for
Reset.
57
STAND ALONE PROGRAMMABLE SAFETY CONTROLLER
(single NO)
IN1 OUT
0
1
Simultaneity error *
-
X
X
-
t = 250ms
0
1
IN1 IN2
0 0
0 1
1 0
1 1
t1 > 250ms
t2 = 250ms
(double NC-NO)
OUT Simultaneity error *
0 X
0 -
1 -
0 X
8541403 • 19/07/2021 • Rev.1