Operating Instructions
Modular Safety Control System MSC
104
(Translation of the original operating instructions) 2121331-04-04/19
9.2.2.10. Two-hand control (TWO-HAND)
Using the TWO-HAND function block the input status of a two-hand control switch is checked.
If both pushbuttons are pressed at the same time (within max. 500 ms), the OUTPUT output is "1" (TRUE); this status is
retained on releasing the pushbutton. Otherwise the OUTPUT output is "0" (FALSE).
Figure 103: Two-hand control
Parameter
Input Type:
Ì
Double NO – makes it possible to connect a two-hand switch with one normally open contact for each pushbutton
(EN 574 III A).
Ì
Quad NC-NO – makes it possible to connect a two-hand switch with a dual-channel normally closed/normally open con-
tact for each pushbutton (EN 574 III C).
Important!
¨
Connect inactive input (OUTPUT output is "0" (FALSE)) as follows:
Ì
NO contact to terminal that has been assigned to the input IN1.
Ì
NC contact to terminal that has been assigned to the input IN2.
Output Test: Using this option you can select which test output signals are to be sent to the component contacts. Short
circuits between the wires can be detected and rectified by means of this additional check. For this purpose it is necessary
to select the test output signals.
StartUp Test: If selected, the test is undertaken on switching on the external components (two-hand control). This test is
undertaken by pressing at the same time (within max. 500 ms) and releasing both pushbuttons to carry out one complete
function test and to activate the output. This test is only requested on starting the machine (on switching on the module).
Filter (ms): Makes it possible to filter the input signals. This filter can be set to between 3 and 250 ms and removes any
contact bounce. The time set for the filter affects the calculation of the total response time of the module.
Enable Error Out: If selected, an error detected by the function block is displayed.
Item Description: Here you can enter a functional description for the component. This text is displayed in the upper part of
the symbol.
Содержание MSC
Страница 1: ...EN Operating Instructions Installation and use Modular Safety Control System MSC ...
Страница 171: ......
Страница 173: ......