TREND NXL Variable Speed Drives - Manual (Page 7)

7 NXL Variable Speed Drives Data Sheet TA200620 Issue 1/G 13/06/07
Data Sheet NXL
FIRMWARE
Applications
The Multicontrol Application for Vacon NXL uses direct frequency
reference from the analogue input 1 as a default. However, a PID
controller can be used e.g. in pump and fan applications, which
offers versatile internal measuring and adjusting functions. This
means that external devices are not necessary. When the drive
is commissioned, the only visible parameter group is B2.1 (Basic
parameters). The special parameters can be browsed and edited
after changing the value of par. 2.1.22 (Parameter conceal).
The direct frequency reference can be used for the control
without the PID controller and it can be selected from the analogue
inputs, fieldbus, keypad, preset speeds or motor potentiometer.
The PID controller reference can be selected from the analogue
inputs, fieldbus, PID keypad reference 1 or by enabling the PID
keypad reference 2 via digital input. The PID controller actual
value can be selected from the analogue inputs, fieldbus or the
actual values of the motor. PID controller can also be used when
the frequency converter is controlled via fieldbus or the control
keypad.
· Digital inputs DIN2, DIN3, (DIN4) and optional dig. inputs DIE1,
DIE2, DIE3 are freely programmable.
· Internal and optional digital/relay and analogue outputs are
freely programmable.
· Analogue input 1 can be programmed as current input, voltage
input or digital input DIN
Additional functions:
· The PID controller can additionally be used from control places
I/O, keypad and fieldbus
· Sleep function
· Actual value supervision function: fully programmable; off,
warning, fault
· Programmable Start/Stop and Reverse signal logic
· Reference scaling
· 2 Preset speeds
· Analogue input range selection, signal scaling, inversion and
filtering
· Frequency limit supervision
· Programmable start and stop functions
· DC-brake at start and stop
· Prohibit frequency area
· Programmable U/f curve and U/f optimisation
· Adjustable switching frequency
· Autorestart function after fault
· Protections and supervisions (all fully programmable; off,
warning, fault):