Danfoss VLT HVAC Series Programming Manual page 279

VLT ® HVAC Drive Programming Guide
26-37 Term. X42/5 Live Zero
Option:
[0] Disabled
[1] * Enabled
26-40 Terminal X42/7 Output
Option:
[0] * No operation
[100] Output frequency
[101] Reference
[102] Feedback
[103] Motor current
[104] Torque rel to limit
[105] Torq relate to rated
[106] Power
[107] Speed
[113] Ext. Closed-loop 1
[114] Ext. Closed-loop 2
[115] Ext. Closed-loop 3
[139] Bus ctrl.
[141] Bus ctrl t.o.
26-41 Terminal X42/7 Min. Scale
Range:
0.00 %* [0.00 - 200.00 %]
26-42 Terminal X42/7 Max. Scale
Range:
100.00 %* [0.00 - 200.00 %]
See principle graph for par.6-52 Terminal 42 Output Max Scale
Function:
This parameter makes it possible to enable the live zero monitoring, for example where the analog
input is a part of the adjustable frequency drive control, rather than being used as part of a decentral
I/O system, such as a building management system.
Function:
Set the function of terminal X42/7 as an analog voltage output.
Function:
Scale the minimum output of the selected analog signal at terminal X42/7, as a percentage of the
maximum signal level, for example if a 0 V (or 0 Hz) is desired at 25% of the maximum output
value. Then program 25%. Scaling values up to 100% can never be higher than the corresponding
Terminal X42/7 Max. Scale
setting in par.26-42
See principle graph for par.6-51
Function:
Scale the maximum output of the selected analog signal at terminal X42/7. Set the value to the
maximum value of the voltage signal output. Scale the output to give a voltage lower than 10V at
full scale; or 10V at an output below 100% of the maximum signal value. If 10 V is the desired
output current at a value between 0–100% of the full-scale output, program the percentage value
in the parameter, i.e., 50% = 10 V. If a voltage between 0 and 10V is desired at maximum output,
calculate the percentage as follows:
( )
V
10
x
desired maximum voltage
i.e.
10 V
5 V : × 100 % = 200 %
V
5
.
MG.11.C6.22 - VLT ® is a registered Danfoss trademark
.
Terminal 42 Output Min Scale .
100 %
3 Parameter Description
3
3-255