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timohei.net / My Courses / Automation Systems / MetsoDNA Configuration How-to /

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pls Function Block is used to generate a pulse- or a delay.

You'll find the block from Fblocks2 menu. A symbol with bin (black) or bo (pink) type output can be selected. Usually, a binary (bin) type block is used, as it can easily be connected to logic ports. bo type has to be used if the output of the block is connected to a BOU8 channel, and timing with more accurate resolution than module execution interval is needed.

Selecting pls Function Block

Pulse

To generate a "1" pulse from a rising edge at the block input a following configuration is used:

PULSSI = PULSE
NOUSU = RISING EDGE

Delay

To implement a rising edge delay the block's parameters are set as follows:

VIIVE = DELAY
NOUSU = RISING EDGE

A falling edge delay is implemented in the following way:

VIIVE = DELAY
LASKU = FALLING EDGE

Defining length of pulse/delay

The length of the delay or pulse is defined by applying the value (in seconds) to input (pulse length). The length can be calculated or input from a measurement, but usually it is fixed and can be applied to the block input as a Constant. A constant value of ana type can be found from Common menu at Constants left...:

ana type is indicated by green color:

A form is opened for inputting the constant value:

ALKUARVO = VALUE

Note that type ana consists of two values that are separated by a comma: (set without virtually any exception to zero) and the actual analog value (here: 5.0):

Here you can see a pulse function block that is configured to give a five second pulse whenever there is a rising edge at the cntrl input:

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