Rs-485 Bus Connection - Danfoss VLT HVACDrive Instruction Manual

VLT ® HVAC Drive Instruction Manual
Parameter
Par. 0-01 Language
Par. 1-20 Motor Power [kW]
Par. 1-21 Motor Power [HP]
Motor Voltage
Par. 1-22 *
Motor Frequency
Par. 1-23
Motor Current
Par. 1-24
Motor Nominal Speed
Par. 1-25
Par. 1-28 Motor Rotation Check
Par. 3-41 Ramp 1 Ramp-up Time
Ramp 1 Ramp-down Time
Par. 3-42
Motor Speed Low Limit [RPM]
Par. 4-11
Motor Speed Low Limit [Hz]
Par. 4-12
Motor Speed High Limit [RPM]
Par. 4-13
Par. 4-14 Motor Speed High Limit [Hz]
Par. 3-19 Jog Speed [RPM]
Par. 3-11 Jog Speed [Hz] *
Terminal 27 Digital Input
Par. 5-12
Function Relay
Par. 5-40 **
Table 5.1: Quick Set-up parameters
*The display showing depends on choices made in par. 0-02
Speed Unit and par. 0-03 Regional Settings
as required.
Function Relay
** Par. 5-40 , is an array, where one may choose between Relay1 [0] or Relay2 [1]. Standard setting is Relay1 [0] with the default choice
Alarm [9].
See the parameter description in the section
For a detailed information about settings and programming, please see the
x=version number
NOTE!
If [No Operation] is selected in par. 5-12
If [Coast Inverse] (factory default value) is selected in par. 5-12
start.

5.1.2 RS-485 Bus Connection

One or more adjustable frequency drives can be connected to a controller
(or master) using the standard RS-485 interface. Terminal 68 is connec-
ted to the P signal (TX+, RX+), while terminal 69 is connected to the N
signal (TX-, RX-).
If more than one adjustable frequency drive is connected to a master,
use parallel connections.
[Units]
[kW]
[HP]
[V]
[Hz]
[A]
[RPM]
[Hz]
[s]
[s]
[RPM]
* [Hz]
[RPM]
* [Hz]
[RPM]
[Hz]
Motor Speed Unit
depend on which region of the world the adjustable frequency drive is supplied to but can be re-programmed
Commonly Used Parameters
.
VLT HVAC Drive Programming Guide, MG.11.CX.YY
Terminal 27 Digital Input
MG.11.AB.22 - VLT ® is a registered Danfoss trademark
5 Commissioning and Application Examples
and par. 0-03 Regional Settings . The default settings of par. 0-02
y=language
, no connection to +24 V on terminal 27 is necessary to enable start.
Terminal 27 Digital Input
, a connection to +24 V is necessary to enable
Figure 5.2: Connection example.
5
Motor
5-3