Quantech
169
Section 7: Unit controls
Form QTC3-NM1
Issue date: 12/19/2023
7
Communications data map notes
See Table 22 on page 169.
1. -
net MS/TP and Modbus RTU communications.
E-Link Gateway not required for these two com-
munication protocols.
2. BACnet Object Types:
0 = Analog In
1 = Analog Out
2 = Analog Value
3 = Binary In
4 = Binary Output
5 = Binary Value
8 = Device
15 = Alarm Notifica-
tion (0 through 127
are reserved ASHRAE
Objects).
3.
WC= Inches of water
column
CFM = Cubic Feet per
Minute
FPM = Feet per Minute
PSI = Lb per square
inch
Pa = Pascals
kPa = Kilopascals
PPM = Part per Mil-
lion
kJ/kg = Kilojoules per
Kilogram.
4.
as Air Cooled Scroll units, ignoring Fan Control.
The following table shows the real time error numbers
that may be encountered during communication setup
and a description of each.
Table 22: Real Time Error Numbers
Error
number
(##)
Description
0 All ok
1 Datum type ok test failed
2 English text too long
3 Floating point exception
4 Get packet failed
5 Get type failed
6 Invalid unit conversion
7 Invalid hardware selection
8 Real time fault
9 Spanish text too long
10 Thread exited
11 Thread failed
12 Thread stalled
13 IO board reset
14 BRAM invalid
15 BACnet setup failed
Reboot required (cycle power) after set-
tings are changed.
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