PARR, PARI, PARB – Blocks with input-defined parameter

Block SymbolsLicensing group: STANDARD
PIC PIC PIC

Function Description
The PARR, PARI and PARB blocks allow, additionally to the standard way of parameters setting, changing one of their parameters by the input signal. The input-parameter pairs are p and par for the PARR block, ip and ipar for the PARI block and finally P and PAR for the PARB block.

The Boolean input LOC (LOCal) determines whether the value of the par (or ipar, PAR) parameter is read from the input p (or ip, P) or is input-independent (LOC = on). In the local mode LOC = on the parameter par (or ipar, PAR) contains the last value of input p (or ip, P) entering the block right before LOC was set to on. Afterwards it is possible to modify the value manually.

The output value is equivalent to the value of the parameter y= par, (or k= ipar, Y= PAR). The output of the PARR and PARI blocks can be additionally constrained by the saturation limits lolim,hilim. The saturation is active only when SATF = on.

See also the SHLD block, which can be used for storing a numeric value, similarly as in the PARR block.

Inputs

p

Parameter value (the PARR block)

Double (F64)

ip

Parameter value (the PARI block)

Long (I32)

P

Parameter value (the PARB block)

Bool

LOC

Activation of local mode

Bool

off ..

The parameter follows the input

on ...

Local mode active

Output

y

Logical output of the PARR block

Double (F64)

k

Logical output of the PARI block

Long (I32)

Y

Logical output of the PARB block

Bool

Parameter

par

Initial value of the parameter (the PARR block)  1.0

Double (F64)

ipar

Initial value of the parameter (the PARI block)  1

Long (I32)

PAR

Initial value of the parameter (the PARB block)  on

Bool

SATF

Activation of the saturation limits for the PARR and PARI blocks

Bool

off ..

Signal not limited

on ...

Saturation limits active

hilim

Upper limit of the output signal (the PARR and PARI blocks)  1.0

Double (F64)

lolim

Lower limit of the output signal (the PARR and PARI blocks)  -1.0

Double (F64)

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