Danfoss VLT Compressor Drive CDS 803 - Vibration and Shock; Control Structures; Control Structure Open Loop; Local (Hand On) and Remote (Auto On) Control

2.5 Vibration and Shock
The frequency converter has been tested according to the
procedure based on the shown standards, Table 2.2.
The frequency converter complies with requirements that
exist for units mounted on the walls and
oors of
production premises, and in panels bolted to walls or
oors.
IEC/EN 60068-2-6 Vibration (sinusoidal) - 1970
IEC/EN 60068-2-64 Vibration, broad-band random
Table 2.2 Standards
2.6 Control Structures
Select open loop or closed loop in parameter 1-00 Conguration Mode.
2.6.1 Control Structure Open Loop
130BB892.10
100%
0%
-100%
100%
Local
reference
scaled to
Hz
Auto mode
Hand mode
LCP Hand on,
off and auto
on keys
Local
Remote
Reference
Ramp
P 4-10
Motor speed
direction
To motor
control
Reference
handling
Remote
reference
P 4-14
Motor speed
high limit [Hz]
P 4-12
Motor speed
low limit [Hz]
P 3-4* Ramp 1
P 3-5* Ramp 2
Illustration 2.1 Open-loop Structure
In the conguration shown in Illustration 2.1,
parameter 1-00 Conguration Mode is set to [0] Open loop.
The resulting reference from the reference handling system
or the local reference is received and fed through the ramp
limitation and speed limitation before being sent to the
motor control. The output from the motor control is then
limited by the maximum frequency limit.
2.6.2 Local (Hand On) and Remote (Auto
On) Control
The frequency converter can be operated manually via the
local control panel (LCP) or remotely via analog/digital
inputs or serial bus. If allowed in parameter 0-40 [Hand on]
Key on LCP, parameter 0-44 [O/Reset] Key on LCP, and
parameter 0-42 [Auto on] Key on LCP, it is possible to start
and stop the frequency converter via LCP by pressing
[Hand On] and [O/Reset]. Alarms can be reset via the
[O/Reset] key.
Hand
On
Off
Reset
Auto
On
130BB893.10
Illustration 2.2 LCP Keys
Local reference forces the
conguration mode to open
loop, independent on the setting of parameter 1-00 Cong-
uration Mode.
Local reference is restored at power-down.
Product Overview
VLT
®
Compressor Drive CDS 803
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