Td
(derivative
action time)
PID control parameters
Xp (gain)
Ti (integral
action time)
Control band
Assign default PID
parameters
Controlled system
heating rate
Slow
Normal
Fast
Very fast
Operation
4-35
P/N 7105144G
2008 Nordson Corporation
VersaBlue_NW
Controlled System Heating Rate
NOTE: The setting Normal generally does not need to be changed. It can
not be changed for grid and reservoir.
There are fixed parameter sets for the first four types.
Type
Suitable for
Slow* Temperature channels that heat slowly
Normal Grid, reservoir, hose, gun
Fast ** Temperature channels that heat quickly
Very fast Air heater
Customer specific Refer to Screen 3: PID control parameters.
* To be set if heating the last 5 °C up to the setpoint takes too long (possible
with a very high temperature setpoint)
** To be set if the temperature swings above the setpoint during heatup
(possible with a very low temperature setpoint)
Normal
Screen 3: PID Control Parameters
Prerequisite: Controlled System Heating Rate − Customer-specific
The PID control parameters can be selected as desired in this screen.
NOTE: Should be adjusted only by personnel with experience in metrology
and control technology.
NOTE: The I-component can be deactivated with the value 0.
Fig. 4-26 T4
The control band is the +/− range around the temperature setpoint. Above
the band the heater is always off, and below the band the heater is always
on.
Recommended control band: 5 °C (9°F)
Assign default PID
parameters
For orientation purposes, the parameter set of one of the
four controlled system heating rates can be loaded. Then individual values
can be adjusted.
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