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Installation on a trend system, Knobs, Switches – TREND NX Variable Speed Drives User Manual

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Installation on a Trend System

Knobs

Knob

Label ($)

Units
(%)

Top Limit
(T)

Bottom Limit
(B)

Description

1

Demand

%

100

0

Defines required speed in
terms of percentage of
frequency range between
minimum and maximum
frequency (S8 to S9)

2*

Failure
Demand

-

0

0

Defines required speed if
the watchdog strategy
detects that the demand
value has not been
received.

Switches

Switch

Label ($)

Description

1

Command Signal

I switches motor on, O switches motor off

2

Fault Reset

Set to I to reset the fault

3*

Watchdog

Starts the timer in the watchdog strategy when
set to 1, when set to 0 timer is reset. If watchdog
strategy is being used this must be set to 0 at a
regular interval less than the on delay set in
watchdog strategy (default 600s).

4*

Watchdog Enable

Enables/disables the watchdog strategy.
1=enabled, 0=disabled.

5*

Fail Run Mode

The run mode used (i.e. motor on/off) if the
watchdog strategy detects that the command
signal has not been received.

* These parameters are used by the watchdog strategy only available in NXIP

Note that the Knobs and Switches provide control of the motor from the network
(e.g. from a controller by IC Comms).

Display and Directory Modules: (e.g. for use by NDP)

Directory

Label

Display

Item

Label

Units

1

Operation

S3

O-P Frequency

Hz

S4

O-P Current

Amps

S2

O-P Power kW

kW

I2

Motor Available

I3

Fault Status

2

S17

Active Fault

W2

Fault Reset

I8

Preset 1 Select

I9

Preset 2 Select

10

NX Variable Speed Drives Installation Manual TG200434 Issue 3/A 04/07/2006