10
User Manual
Zenex Pro
Table 4.1
Parameter Description
Settings
Default Value
INPUT TYPE
Refer Table 4.2
(Default : Type K)
Refer Table 4.2 for various available ‘Input Types’ along with their
respective Ranges and Resolutions.
TEMPERATURE DISPLAY UNITS
Select as ‘°C’ (Centigrade) or ‘°F’ (Fahrenheit).
°C
°F
(Default : °C)
TEMPERATURE RANGE
This parameter value must be set in accordance with the
Maximum Temperature Range for which the equipment / machine
is designed. Set this parameter value appropriately as the same is
used by the controller to determine whether or not to Self-Tune /
Optimize the controller upon detecting the “Tune at Setpoint
Change” condition.
CONTROL OUTPUT TYPE
Refer Table 4.3 for the available options.
Refer Table 4.3
(Default : Relay)
CONTROL MODE
On-Off
The control algorithm tends to maintain the PV at SP
by either
switching the output (say, Heater) fully OFF or fully ON. The On
and Off switching is differentiated by the user settable ‘Hysteresis
Band’.
PID
The control algorithm uses a 2nd order equation to compute the
‘% Output Power’ required to maintain the PV at SP. The constants
P, I, D are automatically set by the controller.
On-Off
PID
(Default : PID)
CONTROL LOGIC
Direct
Cooling Control (Output Power increases with increase in PV).
Reverse
Heating Control (Output Power decreases with increase in PV).
Direct
Reverse
(Default : Reverse)
HYSTERESIS
(For ON-OFF Control only)
Sets a differential (dead) band between the ON and OFF states.
Keep it large enough to avoid frequent switching of the load
without losing the desired control accuracy.
1 to 999°C
or
0.1 to 99.9°C
(Default : 2
or
0.2)
PAGE 10 : I / O CONFIGURATION PARAMETERS
Section 4
(Default : 1376)
Min. to Max. specified
for the selected Input Type
(Refer Table 4.2)
