Isn Control; Table 32 - Isn Received Data; Table 33 - Isn Transmitted Data - York YLUA0248 Series Installation Operation & Maintenance

SECTION 10 – MAINTENANCE
Received Data (Control Data)
The unit receives 8 data values from the ISN. The first
4 are analog values and the last 4 are digital values.
These 8 data values are used as control parameters
when in REMOTE mode. When the unit is in LOCAL
mode, these 8 values are ignored. If the unit receives
no valid ISN transmission for 5 minutes it will revert
back to all local control values. Table 32 on page 148
lists the 5 control parameters. These values are found
under feature 54 on the ISN.

TABLE 32 - ISN RECEIVED DATA

ISN
CONTROL DATA
PAGE
SETPOINT
P03
COOLING
P04 LOAD LIMIT STAGE (0,1, 2)
P05 –
P06
–
START/STOP COMMAND
P07
(0 = STOP, 1 = RUN)
P08 —
P09 —
HISTORY BUFFER REQUEST
P10
(0 = CURRENT DATA, 1 = LAST HISTORY DATA)
Transmitted Data
After receiving a valid transmission from the ISN, the
unit will transmit either operational data or history buf-
fer data depending on the "History Buffer Request" on
ISN PAGE 10. Data must be transmitted for every ISN
page under feature 54. If there is no value to be sent to
a particular page, a zero will be sent. Table 33 on page
148 and Table 34 on page 150 show the data values
and page listings for this unit.
ISN PAGES listed are ENG PAGE
REFERENCES and must be decoded
to the corresponding PAGE REF
point map related to the communica-
tions protocol type utilized. The latest
point map information is listed on the
Johnson Controls Group Equipment
Integration website.
148

ISN CONTROL

TABLE 33 - ISN TRANSMITTED DATA

ISN
CHARACTER
PAGE
P11
P12
P13
P14
P15
P16
P17
P18
P19
P20
P21
P22
P23
P24
P25
P26
P27
P28
P29
P30
P31
P32
P33
P34
P35
P36
P37
ISSUE DATE: 09/07/2020
TYPE
Leaving Chilled
8-11 Analog
Liquid Temp.
Return Chilled
12-15 Analog
Liquid Temp.
16-19 Analog
20-23 Analog
SYS 1 Suction
24-27 Analog
Temp. (EEV Only)
28-31 Analog Ambient Air Temp.
SYS 1 Suction
32-35 Analog Superheat
(EEV Only)
SYS 1 Run Time
36-39 Analog
(Seconds)
40-43 Analog SYS 1 Suction
Pressure
SYS 1 Discharge
44-47 Analog
Pressure
48-51 Analog
52-55 Analog
SYS 1 EEV
56-59 Analog Output %
(EEV Only)
SYS 1
60-63 Analog
Anti-Recycle Timer
Anti-Coincidence
64-67 Analog
Timer
SYS 2 Suction
68-71 Analog
Temp. (EEV Only)
SYS 2 Run Time
72-75 Analog
(Seconds)
SYS 2
76-79 Analog
Suction Pressure
SYS 2
80-83 Analog
Discharge Pressure
84-87 Analog
88-91 Analog
SYS 2
92-95 Analog Suction Superheat
(EEV Only)
SYS 2
96-99 Analog
Anti-Recycle Timer
SYS 2 EEV
100-103 Analog Output %
(EEV Only)
104-107 Analog # of Compressors
108 Digital SYS 1 Alarm
109 Digital SYS 2 Alarm
JOHNSON CONTROLS
FORM 150.73-NM2
DATA
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