Trane LonWorks



TR1 Series VFD Installation And Operation Manual page 38

Parameter Description
FREQ BYPASS
215
B.W.
300 – 328 Refer to IOM
402 FLYING START
Reference Feedback
415
Units
500 PROTOCOL
501 ADDRESS
502 BAUD
803 BUS TIME OUT
TIME OUT
804
FUNCTION
Parameters for Open Loop Control and Monitor through LON (Scenario C)
Parameter Description
100 CONFIG. MODE
204 MIN. REFERENCE
205 MAX. REFERENCE
308 AI [V] 53 FUNCT.
311 AI [V] 54 FUNCT.
314 AI [mA] 60 FUNCT
38
General Parameter Settings (Continued)
Setting
OFF
DISABLE
%
FC
Not Required
Not Required
1 sec.
No Function
Setting
OPEN LOOP
As required
As required
REFERENCE
or
NO OPERATION
REFERENCE
or
NO OPERATION
REFERENCE
or
NO OPERATION
Comment
This allows the drive to "step over" troublesome speeds, like
speeds where the balance of a large axial fan isn't quite right.
For your tests you don't want to exclude any operating speeds.
These settings are for Closed Loop, local override and safety
controls.
In normal fan applications, enabling flying start helps the drive
synchronize with a motor that might be rotating. In
demonstration applications, this synchronization procedure can
be confusing.
Set according to transmitter type used in Closed Loop control.
Set parameter 927, PARAMETER EDIT, to ENABLE.
Set parameter 928, PROCESS CONTROL to ENABLE.
There is no need to specifically select the LonWorks protocol.
Installing the board does that. The parameters above simply
activate the installed protocol.
LonWorks does not require the assignment of a device address.
The Neuron ID takes care of this.
LonWorks Free Topology has a fixed BAUD rate of 78 Kbaud.
Used for LON only
Used foe LON only
Comment
Sets up the drive to follow a speed reference signal.
This is generally set for either 0 Hz or the value of parameter
201, MIN. FREQUENCY. The selection depends on how the
speed reference signal is set up.
Generally 60 Hz, the same as the setting of parameter 202,
MAX. FREQUENCY.
This determines if analog input 53 is used for the speed
reference signal. If it is, the scaling of this input is controlled
by parameters 309 and 310. If it isn't, this should be set to
NO OPERATION.
This determines if analog input 54 is used for the speed
reference signal. If it is, the scaling of this input is controlled
by parameters 312 and 313. If it isn't, this should be set to
NO OPERATION.
This determines if analog input 60 is used for the speed
reference signal. If it is, the scaling of this input is controlled
by parameters 315 and 316. If it isn't, this should be set to
NO OPERATION.