ABB REB650, Technical Manual

Page: 73 / 504

FNKEYMD1 - FNKEYMD5 function block also has a number of settings and
parameters that control the behavior of the function block. These settings and
parameters are normally set using the PST.
Operating sequence
The operation mode is set individually for each output, either OFF, TOGGLE or
PULSED.
Mode 0 (OFF)
This mode always gives the output the value 0 (FALSE). Changes on the IO attribute
(changes in the input value does not affect the output value) are ignored.
Input value
Output value
IEC09000330-1-en.vsd
IEC09000330 V1 EN
Figure 26: Sequence diagram for Mode 0
Mode 1 (TOGGLE)
In this mode the output toggles each time the function block detects that the input has
been written (the input has completed a pulse). 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
Output value
IEC09000331_1_en.vsd
IEC09000331 V1 EN
Figure 27: Sequence diagram for Mode 1
Mode 2 (PULSED)
In this mode the output will be high for as long as the setting 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.
1MRK 505 277-UUS C
Section 5
Local Human-Machine-Interface LHMI
67
Technical Manual