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YORK INTERNATIONAL
109
FORM 150.62-NM1
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 pa-
rameters 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 51 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 buffer
data depending on the “History Buffer Request” in 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 52 - 53 show the data
values and page listings for this unit.
ISN CONTROL
TABLE 51 – ISN RECEIVED DATA
TABLE 52 – ISN TRANSMITTED DATA
ISN PAGE CONTROL DATA
P03 SETPOINT
P04 LOAD LIMIT STAGE (0,1, 2)
P05 COOLING RANGE (DAT MODE ONLY)
P06 —
P07 START/STOP COMMAND
P08 —
P09 —
P10 HISTORY BUFFER REQUEST
ISN PAGE TYPE DATA
P11 ANALOG LEAVING CHILLED LIQUID TEMP.
P12 ANALOG RETURN CHILLED LIQUID TEMP.
P13 ANALOG MIXED CHILLED LIQUID TEMP.
P14 ANALOG DISCHARGE AIR TEMP.
P15 ANALOG —
P16 ANALOG AMBIENT AIR TEMP.
P17 ANALOG —
P18 ANALOG SYS 1 RUN TIME (SECONDS)
P20 ANALOG SYS 1 DISCHARGE PRESSURE
P21 ANALOG —
P22 ANALOG —
P23 ANALOG —
P24 ANALOG SYS 1 ANTI-RECYCLE TIMER
P25 ANALOG ANTI-COINCIDENT TIMER
P27 ANALOG SYS 2 RUN TIME (SECONDS)
P28 ANALOG SYS 2 SUCTION PRESSURE
P29 ANALOG SYS 2 DISCHARGE PRESSURE
P33 ANALOG SYS 2 ANTI-RECYCLE TIMER
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 —
P41 DIGITAL —
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