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8.2 Trend IQx Outstation Configuration
3 sensors (1 currently unused), 2 switches and 4 knobs are required to store all the
parameters for a single unit.
The table below shows how to calculate the number of each object required :
Fan Coil
Parameter
Sensor No.
Switch No.
Knob No.
Return Air
S+((FC-1)*3)
Error Code
S+((FC-1)*3)+1
‘Unused’ S+((FC-1)*3)+2
On/Off
W+((FC-1)*2)
Inhibit
W+((FC-1)*2)+1
Setpoint
K+((FC-1)*4)
Mode
K+((FC-1)*4)+1
Fan Speed
K+((FC-1)*4)+2
Air Direction
K+((FC-1)*4)+3
where
FC
= Fan Coil Address (1 to 64)
S
= Sensor Base Address
W
= Switch Base Address
Set using configuration software
K
= Knob Base Address
E.g.
If
Sensor Base Address
=100
Switch Base Address
= 50
Knob Base Address
= 50
then the following table shows the object numbers required for addresses 1,2,63 and 64.
FC 1
FC 2
…..
FC 63
FC 64
Sensors
100 to 101
103 to 104
…..
286 to 287
289 to 290
Switches
50 to 51
52 to 53
…..
174 to 175
176 to 177
Knobs
50 to 53
54 to 57
…..
298 to 301
302 to 305
The Black Pear can be configured to enable only those objects of interest to the user,
therefore reducing the memory overhead required in the IQ outstation. Any objects
enabled in the Black Pear which aren’t defined in the Trend outstation will simply be
ignored during the polling sequence.
Note that this does not change the sensor, switch and knob numbers associated with each
HVAC parameter.
If a sensor has been added to the sequence table then its ‘Value’
output must be connected to its ‘Source Value’ input, otherwise it will
return a reading of zero.
See Appendix C for details of the memory requirements in the Trend outstation.
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