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Standard function blocks
280
02/16 MN05013001Z EN
Operation of the function block
The multiplexer is active if the enable coil MX..EN has been
triggered.
You use the channel number input MX..K to set which input
is to be switched through to the output. The channel number
input switches the input values in their order, i.e.:
• Channel number 0 supplies the input MX..I1 to MX..QV.
• Channel number 7 supplies the input MX..I8 to MX..QV.
The fault contact MX..E1 closes if an invalid parameter is
present at the channel number input MX..K.
Example
A drive is required to run at a fixed speed and at three
dependent speeds.
It receives the setting from a multiplexer function block.
MB08 defines the channel number that is to be passed onto
the output. The fixed speed is set as a constant at input
MX01I1, the subsequent inputs are assigned the variable
values from markers MB01 to B03. The setpoints at output
MX01QV of the function block are output at MB04.
The function block is first of all activated in the standard
circuit diagram by marker M33. The following diagram
shows the association.
L
Figure 129:Circuit diagram for enabling the data multiplexer
function block
M 33---------------------------
Ä
MX01EN
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