AS ONE NDK-1A-F, Инструкция по эксплуатации

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➊ -|Transparent setting guide|- ➊ -|Transparent setting guide|-
SETUP group function
8. Manual reset[
REST
]
When selecting P/PD control mode, certain temperature difference exists because heater's
rising and falling time is inconsistent due to thermal characteristics of controlled objects,
such as heat capacity and heater capacity. This temperature difference is called offset, and
manual reset [
REST
] is able to set or correct the offset.
● Manual reset [
REST
] by control result
Set below 50.0% as reset value
Set over 50.0% as reset value
Offset
Offset
SV
● Setting method
When PV and SV are equal, the reset value is 50.0%.
After the control is in stable, if PV is lower than SV,
set the reset value over 50.0%.
On the contrary, if the PV is higher than SV,
set the reset value below 50.0%.
7. Hysteresis [
HYS
]
Hysteresis
[
HYS
]
ON OFF
SV
Control output
Temperature
In ON / OFF control, Set ON and OFF intervals of control output.
● If the hysteresis is too narrow, it may cause hunting (oscillation, chattering) on the
control output due to external noise.
● In ON / OFF control, hunting occurs at regular intervals even when the control is
in stable. The causes of hunting are the setting value of the hysteresis [
HYS
], the
response characteristics of the controlled subject, and the attachment of the sensor.In
order to minimize this hunting width, set the hysteresis by considering proper
hysteresis value [
HYS
], heater capacity and thermal characteristics, sensor's response
time and position.
6. Sampling [
SP
], Sampling time [
SPT
]
Save the present temperature (PV) at the internal memory in the sampling period you set.
Sampling [
SP
] is set to
ON
, appears on the icon display part. Set the sampling time
[
SPT
]. When the sampling time is set to
5
(Sec), the value of present temperature is saved
at the internal memory once every 5 seconds. (Up to 7,700 values)
You can check the saved data using the comprehensive device management program
(DAQMaster for AS ONE) by connecting the main unit and PC. For more information,
see the DAQMaster for AS ONE user manual.
※ When sampling [
SP
] is set from
OFF
to
ON
, all previously saved data will be deleted.
※ When the power is on again, the data is saved continuously.
※ When the storage space of internal memory is insufficient, flashes every 0.5 seconds
and data is not saved.
※ The manual reset can be set in the proportional control (P/PD control).
The manual reset [
REST
] appears when the reset time [
I
] is set to
0000
.