Maintenance, Problems with the controller, Calibration of the input – NOVUS Controller N120 User Manual
Page 10: Calibration of the analogical output, Warranty
NOVUS AUTOMATION
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MAINTENANCE
PROBLEMS WITH THE CONTROLLER
Connection errors and inadequate programming are the most
common errors found during the controller operation. A final revision
may avoid loss of time and damages.
The controller displays some messages to help the user identify
problems.
MESSAGE
DESCRIPTION OF THE PROBLEM
----
Open input. No sensor or signal.
Err1
Err6
Connection and/or configuration errors. Check
the wiring and the configuration.
Other error messages may indicate hardware problems requiring
maintenance service. When contacting the manufacturer, inform the
instrument serial number, obtained by pressing the key
for more
than 3 seconds.
CALIBRATION OF THE INPUT
All inputs are factory calibrated and recalibration should only be done
by qualified personnel. If you are not familiar with these procedures
do not attempt to calibrate this instrument.
The calibration steps are:
a) Configure the type of input to be calibrated.
b) Configure the lower and upper limits of indication for the
maximum span of the selected input type.
c) At the input terminals inject a signal corresponding to a known
indication value a little above the lower display limit.
d) Access the parameter “inLC”. With the keys
and
adjust the
display reading such as to match the applied signal. Then press the
P
key.
e) Inject a signal that corresponds to a value a little lower than the
upper limit of indication.
f) Access the parameter “inLC”. With the keys
and
adjust
the display reading such as to match the applied signal. Then
press the
P
key.
Note: When checking the controller calibration with a Pt100
simulator, pay attention to the simulator minimum excitation current
requirement, which may not be compatible with the 0.170 mA
excitation current provided by the N120.
CALIBRATION OF THE ANALOGICAL OUTPUT
• Configure I/O 5 for the current output to be calibrated, be it
control or retransmission.
• In the screen “Ctrl”, program manual mode (
man
).
• Connect a current meter at the analog output.
• Enter the calibration cycle with the correct password.
• Select the screen “ovLC”. Press the keys
and
for the
controller to recognize the calibration process of the current output.
• Read the current indicated on the current meter and adjust the
parameter “ovLC” to indicate this current value (use the keys
and
)
• Select the screen “ovxC”. Press the keys
and
for the
controller to recognize the calibration process of the current output.
• Read the current indicated on the current meter and adjust the
parameter “
ovkC
” to indicate this current value
The key
P
or
in order to leave the screen confirm the
calibration
WARRANTY
Warranty conditions are available on our web site