3.2.4.3
Operation principle
Each output on the FNKEYMD1 - FNKEYMD5 function blocks can be controlled
from the LHMI function keys. By pressing a function button on the LHMI, the output
status of the actual function block changes. These binary outputs can in turn be used
to control other function blocks, for example, switch control blocks, binary I/O
outputs etc.
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 Parameter Setting tool.
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
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. 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)
Section 3
1MRS757256 F
Basic functions
48
PML630/Compact Load-Shedding Solution
Technical Manual
Summary of Contents for Relion 630 Series
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