H - I - J PROGRAMMER’S MANUAL V8.94.11-
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Explanation, further submenus
Permits the parameter setting of the signal which is used to modify the reference signal of the
control or regulation tasks.
1-8-1 source of the modification signal
At setting “N” there is no modification.
N
dig. + virt. IN
PID extender
an. IN 1, 2, 3, 4
motor pot.
1-8-2 type of the modification
normal: increasing or active modifying signal
causes increase of the reference signal.
inverse: increasing or active modifying signal
causes decrease of the reference signal.
1-8-3 lower
This is the extent of the modification of the
absolute reference signal, which will be
effectuated at the minimum of the modifying signal
of variable value (analogue IN or motorised
potentiometer).
According to the way of modification the reference
signal will be increased or decreased.
1-8-4 upper
This is the extent of the modification of the
absolute reference signal, which will be
effectuated at the maximum of the modifying
signal of variable value (analogue IN or motorised
potentiometer).
According to the way of modification the reference
signal will be increased or decreased.
1-8-5 discrete value
This menu can be used with active digital IN1 –
IN8, virtual IN1 – IN6 or with PID extender.
It sets the absolute change made by an active
input.
1-8-6 gradient
normal: The value of the modification related to
100 Hz or 100 %.
ref.sig: The value of the modification related to
the reference signal.
Function of the modifying signal
In a control system, the function of the modification signal is to facilitate the correction of the reference signal by an
external analogue signal or the digital input (e g. change of day run and night run of the system).
In theory, the modified control reference signal can vary between fmin and fmax. If its value goes outside them, the limits
become valid! A modification of 1% means a change of 1Hz in the reference signal!
In a regulation system, the function of the modification signal is to facilitate establishing two-element regulations, or
correcting the regulation reference signal from the digital inputs or at PID extension.
(e g.: humidity depending temperature regulation or temperature depending pressure regulation,
PID extension, if the number of the pumps changes and the reference signal needs to be changed etc.)
In theory, the modified regulation reference signal can vary between 0 and 100 %. If its value goes outside the preset
minimum and maximum control reference signal limits, the limits become valid!
In case of digital input, the percentual value of the modification is the value set in menu item 1-8-5 for each active input.
In case of PID extension the modification can only be interpreted in control mode only, the modification % is the value
set in 1-8-5, at all switched in units.
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