Viconics VT7200 (Echelon) Integration Manual User Manual
Page 9
9
Parameter Variable
Name
Function
This input network variable is used to connect an external fan
speed switch to the node or to allow any supervisory device to
override the fan speed controlled by the node’s control algorithm.
This input is used in conjunction with FanMenu bit in nciGenOpts.
Default Null Value: AUTO (state = 0xFF)
Valid Range:
Fan
Menu
Value
State Value
Equivalent
Percent
Requested Speed
0
N/A N/A
Off
-
Not Used
1
0 0% Off
-
Not Used
1
1 to 66
0.5 to 33%
Low
1
67 to 133
33.5 to 66.5%
Medium
1
134 to 200
67 to 100%
High
1
201 to 255
100%
3 – Not Used
0
0xFF N/A
N/A
Auto
–
Not Used
0 n/
N/A
Off
–
Not Used
1 0
0%
Off
–
Not Used
1
0 to 100
0.5 to 50%
Low
1
101 to 200
50.5 to 100%
High
1
201 to 255
100%
2 – Not Used
1
0xFF N/A
N/A
Auto
–
Not Used
0 N/A
N/A
Off
-
Not Used
1 0
0%
Off
-
Not Used
1
1 to 66
0.5 to 33%
Low
1
67 to 133
33.5 to 66.5%
Medium
1
134 to 200
67 to 100%
High
1
201 to 255
100%
3 – Not Used
2
0xFF N/A
N/A
Auto
0 n/
N/A
Off
–
Not Used
1 0
0%
Off
–
Not Used
1
0 to 100
0.5 to 50%
Low
1
101 to 200
50.5 to 100%
High
1
201 to 255
100%
2 – Not Used
3
0xFF N/A
N/A
Auto
0 n/
N/A
Off
–
Not Used
1 0
0%
Off
–
Not Used
1
1 to 200
0.5 to 100%
On (High)
1
201 to 255
100%
On – Not Used
Fan Mode
network input
SNVT_switch
nviFanSpeedCmd
4
0xFF N/A
N/A
Auto
This input network variable is used to enable or disable the
auxiliary heat stage.
This input is used in conjunction with nviHeatCool and SeqOper.
Default Null Value: AUTO (state = 0xFF)
Set value to 100% for both On & Off state
Valid Range:
State
Value
Auxiliary Heat Operation
0 N/A
Disabled
–
Not Used
1 0
%
Disabled
1
1 to 99%
Partially Enabled – Not Used
1 100%
Enabled
Sequence of
Operation
network input
SNVT_switch
nviAuxHeatEnable
1
See note 1 below
0xFF N/A
Enabled
(invalid)