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JOHNSON CONTROLS
136
FORM 150.63-NM6 (1020)
RECEIVED DATA (CONTROL DATA)
The Middle Market 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 39 lists
the 5 control parameters. These values are found under
feature 54 on the ISN.
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. Tables 40 - 41 show
the data values and page listings for this unit.
ISN CONTROL
TABLE 40 –
ISN TRANSMITTED DATA
ISN
TYPE DATA
PG.
P11
Analog
Leaving Chilled Liquid Temp
P12
Analog
Return Chilled Liquid temp
P13
Analog –
P14
Analog –
P15
Analog
SYS 1 Suction Temp (EEV Only)
P16
Analog
Ambient Air Temperature
P17
Analog
SYS 1 Suction Superheat (EEV Only)
P18
Analog
SYS 1 Run Time (seconds)
P19
Analog
SYS 1 Suction Pressure
P20
Analog
SYS 1 Discharge Pressure
P21
Analog
SYS 1 Cooler Inlet
Refrigerant Temp (R-407c Only)
P22
Analog –
P23
Analog
SYS 1 EEV Output % (EEV Only)
P24
Analog
SYS 1 Anti-Recycle Timer
P25
Analog
Anti-Coincidence Timer
P26
Analog
SYS 2 Suction Temp. (EEV Only)
P27
Analog
SYS 2 Run Time (seconds)
P28
Analog
SYS 2 Suction Pressure
P29
Analog
SYS 2 Discharge Pressure
P30
Analog
SYS 2 Cooler Inlet
Refrigerant Temp (R-407c Only)
P31
Analog –
P32
Analog
SYS 2 Suction Superheat (EEV Only)
P33
Analog
SYS 2 Anti-Recycle Timer
P34
Analog
SYS 2 EEV Output % (EEV Only)
P35
Analog
Number of Compressors
P36
Digital
SYS 1 Alarm
P37
Digital
SYS 2 Alarm
P38
Digital
Evaporator Heater Status
P39
Digital
Evaporator Pump Status
P40
Digital
SYS 1 Comp 1 Run
P41
Digital
SYS 2 Comp 1 Run
P42
Digital
SYS 1 Liquid Line Solenoid Valve or
EEV Pilot Solenoid
P43
Digital
SYS 1 Hot Gas Bypass Valve
P44
Digital
SYS 1 Comp 2 Run
P45
Digital
SYS 2 Comp 2 Run
P46
Digital
SYS 2 Liquid Line Solenoid Valve
or EEV Pilot Solenoid
P47
Digital
Lead System (0=SYS 1, 1=SYS 2)
P48
Digital
SYS 1 Comp 3 Run
ISN
CONTROL DATA
PAGE
P03
SETPOINT
99 = AUTO
P04
LOAD LIMIT STAGE (0,1, 2)
P05
–
P06
–
P07
START/STOP COMMAND (0 = STOP, 1 = RUN)
P08
—
P09
—
P10
HISTORY BUFFER REQUEST
(0 = CURRENT DATA, 1 = LAST HISTORY DATA)
TABLE 39 –
ISN RECEIVED DATA
Service and Troubleshooting
Summary of Contents for YCUL0045
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