JOHNSON CONTROLS
143
SECTION 7 – UNIT CONTROLS
FORM 150.72-ICOM7
ISSUE DATE: 10/22/2020
7
Communications Data Map Notes
(See Table 22)
1. IPU II based units are congured for Native BAC-
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 = Lbs per square
inch
Pa = Pascals
kPa = Kilopascals
PPM = Part per Mil-
lion
kJ/kg = Kilojoules per
Kilogram.
4. Water Cooled Scroll units use the same rmware
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 21 - 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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