Autonics TZ4W Series Handmatig - Pagina 13
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TZN/TZ Series
Cool / Heat function [ O-FT ]
Generally there are two ways to control temperature, one
(heat-function) is to heat when PV is getting down(heater).
The other(cool-function) is to cool when PV is getting
higher (freezer).
These functions are operating oppositely when it is ON/
OFF control or proportional control. But in this case PID
time constant will be different due to PID time constant
will be decided according to control system when it is PID
control.
● Cool-function and heat-function can be set at Parameter 2
group.
● Cool-function [ COOL ] and heat-function [ HEAT ] must
be set correctly according to the application, if set as
opposite function, it may cause a fire. (If set cool-function
[ COOL ] at heater, it will be maintained ON and it may
cause a fire.)
● Avoid changing heat-function to cool-function or cool-
function to heat-function when the unit is operating.
● It is impossible to operate both function at once in this
unit. Therefore, only one function should be selected
only.
● Factory default setting is heat-function [ HEAT ].
SV2 function [ SU-2 ]
If using SV2 function, it changes the temperature of control
system to the second setting value by external relay
contact signal.
It can change the setting value as sequentially by relay
contact without key operation.
SV2
SV
● It can set SV2 at required time and particular area as like
the above chart.
● SV2 is in parameter 1 group.
● Application :
The control system, which has to maintain constant
temperature such as oven. If you open the door,
temperature will go down.
In this case, if you set the second setting value
higher than setting value, temperature will rise fast.
Therefore, after installing a micro-switch in order to
detect the door Open/Close and connect it to SV2 (the
second setting value should be higher than SV) then
it controls temperature of oven efficiently.
H-84
SV-2 control
signal
ON section
Ramp function [ RAMP ]
Ramp function is to delay the rising time or falling time of
temperature. If you change setting value at stable state of
control, it forces to rise or fall the temperature of control
system during setting time at RAMP , RAPD in parameter 1
group.
If RAMP is not ON in parameter 2 group, RAPU , RAPD will
not be displayed in parameter 1 group.
● Set RAMP is ON in parameter 2 group for using ramp
function.
● Set the rising time and falling time at RAPU mode and
RAPD mode of parameter 1 group.
● Ramp function will be operating when changing the set
value at stable control status or supply the power again
after the power was removed.
● The setting range of rising and falling time is 1 to 99
minute.
Ramp rising[ RAPU ] (delay of rising time)
Control temperature when
ramp function is not used
Changing
SV
Initial SV
when ramp function is used
tu
RAPU
setting time
It makes delay rising temperature when change the set
value at stable control status or delay the initial rising
temperature as like above picture.
※ RAPU time cannot be shorter than rising time(tu) of
temperature when Ramp function is not used.
Ramp falling[ RAPD ] (delay of falling time)
Control temperature
when ramp function
is not used
Initial SV
Changing
SV
It controls falling temperature as like above.
※ RAPD time cannot be shorter than falling time(td) of
temperature when Ramp function is not used.
Control temperature
tu
RAPU
setting time
Control temperature
when ramp function
is used
td
RAPD
setting time