ABB REG670 Technical Manual page 104

Section 5
Local Human-Machine-Interface LHMI
98
Operating sequence
The operation mode is set individually for each output, either OFF, TOGGLE or
PULSED.
Setting OFF
This mode always sets the outputs to a low value (0).
Input value
Output value
IEC09000330 V2 EN
Figure 26: Sequence diagram for setting OFF
Setting TOGGLE
In this mode the output toggles each time the function key has been pressed for more
than 500ms. Note that the input attribute is reset each time the function block executes.
The function block execution is marked with a dotted line below.
Input value
500ms
Output value
IEC09000331 V2 EN
Figure 27: Sequence diagram for setting TOGGLE
Setting PULSED
In this mode the output sets high (1) when the function key has been pressed for more
than 500ms and remains high according to set pulse time. After this time the output
will go back to 0. The input attribute is reset when the function block detects it being
high and there is no output pulse.
Note that the third positive edge on the input attribute does not cause a pulse, since the
edge was applied during pulse output. A new pulse can only begin when the output is
zero; else the trigger edge is lost.
1MRK502052-UEN B
500ms 500ms
IEC09000330-2-en.vsd
IEC09000331_1_en.vsd
Technical manual