88
Installation and user guide
Rev: 4.0
NTT 240/460
Operation mode
Analog input setting, related to a speed control, is shown in picture below:
Parameters to set are:
• maximum absolute value for reachable speed
(back and forth operation) when analog input
voltage value matches with ±10V scale value
(example: ±3000RPM).
• speed offset useful to compensate any external
signal offset.
• a low pass digital filter on external signal.
Information about istantaneous measured speed
appears.
6.09.2 Auxiliary references
Auxiliary reference AUX1/IN9
provides following features:
•
speed control
as auxiliary speed reference.
•
speed control
as torque limit reference.
•
position control
as analog position reference, if ‘analog positioner’ is used.
•
pressure control
as analog/inside pressure reference.
Topologies are shown below:
1.
Analog IN9
: reference is feeded from external signal, whose voltage range lies between ±10V. Drive input is
a differential port (pin 3-4 of J9 connector).
•
In auxiliary speed control
, this signal is added to main speed reference and parameters to set are
maximum reachable speed (in absolute value) when analog input voltage value matches with ±10V
scale value (example: ±3000RPM).
•
In position control
, setting minimum target position (equivalent -10V) and maximun target position
(equi10V) parameters, drive performs positioning between this two values following the 12 bit
analog auxiliary reference range (±10V).
•
In pressure control
, this signal feeds pressure reference related to settable parameters into press sub-
menu.
2.
Inside
: auxiliary reference is generated internally by drive and it’s constant. By the way, it can be modified
via Caliper software during operation or via fieldbus parameter.
3.
Torque limit
: reference is used in speed control as torque limit value. Reference is feeded from external
signal, whose voltage range lies between ±10V (pin 3-4 of J9 connector). Parameters to set are:
•
absolute torque value to load when analog input voltage value matches with +10V scale value
(example: 100%).
•
torque offset useful to compensate any external signal offset.
Auxiliary reference AUX2/IN10
(pin 5-6 of J9 connector) is available with all operatin modes and and provides
following features:
•
pressure control
as analog/inside speed reference.
Topologies are shown below:
1.
Analog IN10
: pressure transducer feedback is feeded from external signal, whose voltage range lies
between ±10V. Drive input is a differential port (pin 5-6 of J9 connector).
•
In pressure control
, this signal feeds speed reference related to settable parameters into press sub-menu.
2.
Inside
: auxiliary reference is generated internally by drive and it’s constant. By the way, it can be modified
via Caliper software during operation or via fieldbus parameter.
Содержание NTT 240
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