Analog Input Block For 1X And 2X Expansion Cards (Exp Analog Inputs 1X & 2X) - GE AV-300i User Manual

4 –20 mA on the input it is possible to connect a 4... 20mA current signal. The signal must always
have a positive sign through which, if used as a reference, it is possible to change the
motor rotation direction via AI 1 sgn src. Through the An inp X <thr output it is
possible to state if the current signal is lower than the one of the set threshold. If the
current is <= 4mA , the output supplies a signal (error signal). This, for example, can be
combined with a digital output.
How to perform the self-tuning procedure of the analog input via the Menu:
↵
I/O CONFIG
M
Analog inputs ↵
Std analog inputs 1
M
An inp 1 cfg
AI offs tune
Start?
When the operation has been performed,
the following operator message is displayed:
M
An inp gain tune (gain autotune)
Start?
When the operation has been performed,
the following operator message is displayed:
Go back to the main menu, I/O CONFIG, by pressing Escape, then press ↵
press 6 several times till SAVE PARAMETERS has been reached, then press ↵ to save the settings.
In the Analog input 1 mon submenu it is possible to monitor the values of the calculated offset and gain.
1.6.2 Analog Input Block for 1x and 2x Expansion Cards (Exp Analog Inputs 1X & 2X)
This Block refers to possible Option Expansion cards. See the considerations listed in the previous paragraph,
including the parameter description. The points of difference are:
· No input filter is present
· No alternative reference can be selected (the analog input 1alt sel src is missing)
· The Block has a sampling time of 8 msec
The inputs of this Block are:
· Analog input 1X sign src
AV-300i Version 2 User's Guide
↵
↵
(autotune offset)
Set the potentiometer at zero, then ↵
Set the potentiometer with the maximum value, then
—————— Function Description ——————
Autotune
to cancel the message press 3
End
Autotune
to cancel the message press 3
End
↵ = enter
↵
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