13 ISN CONTROL(York Talk -AMB
Terminal Block TB1)
Note if communications cannot be established check
that the panel has been set up for York Talk. Press the
Program key, followed by four presses on the down
arrow key, followed by the Enter key. The DE
MODIFIER ADDRESS must be set to minus one. Use
the Enter and down arrow keys to set the value.
Repeatedly press the Enter key until the REAL TIME
ERROR is displayed. Reset it if it is not zero. Turn the
power to the panel off then turn back on. Note on power
up the second line of the display should read
INITIALIZING not INITIALIZING BACNET.
13.1 Received Data (Control Data)
The unit receives 8 data values from the ISN. The first 4
(ISN Page P03 to P06, 2 unused) are analog values and
the last 4 (ISN Page P07 to P10, 2 unused) are digital
values. These 4 data values are used as control
parameters when in REMOTE mode. When the unit is in
LOCAL mode, these 4 values are ignored. If the unit
receives no valid ISN transmission for 5 minutes it will
revert back to local control values. The table below lists
the 4 used control parameters. These values are found
under feature 54 on the ISN.
13.2 Transmitted Data
After receiving a valid transmission from the ISN, the
unit will transmit either operational data or history buffer
data depending on the status of the 'History Buffer
Request' (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.
The tables below show the data values and Page
listings for the unit.
1-40
Form 201.26.OI1(11/09)
ISN PAGE CONTROL DATA
P03 CHILLED SETPOINT (99 = UNIT SETPOINT)
P04 LOAD LIMIT STAGE (0, 1, 2)
P05 HOT SETPOINT (999 = UNIT SETPOINT)
0 = Chiller, 1 = Heatpump,
999 = Hand back to panel
P07 START/STOP COMMAND
P10 HISTORY BUFFER REQUEST
P06
ISN PAGE TYPE DATA
P11 ANALOG LEAVING CHILLED LIQUID TEMP.
P12 ANALOG
RETURN CHILLED LIQUID TEMP.
(YLAA/YCWL only)
P13 ANALOG LEAVING HOT LIQUID TEMP. (YCWL only)
P14 ANALOG RETURN HOT LIQUID TEMP. (YCWL only)
P16 ANALOG AMBIENT AIR TEMP. (YLAA/YLAE only)
P18 ANALOG SYS 1 RUN TIME (SECONDS)
P19 ANALOG SYS 1 SUCTION PRESSURE
P20 ANALOG SYS 1 DISCHARGE PRESSURE
P24 ANALOG SYS 1 ANYI-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 (YLAA/YLAE only)
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
P44 DIGITAL SYS 1 COMP 2 RUN
P45 DIGITAL SYS 2 COMP 2 RUN
P46 DIGITAL SYS 2 LIQUID LINE SOLENOID VALVE
P47 DIGITAL LEAD SYSTEM (0=SYS 1, 1 SYS 2)
P48 DIGITAL SYS 1 COMP 3 RUN
P49 DIGITAL SYS 2 COMP 3 RUN
P50 DIGITAL
CHILLED LIQUID TYPE
(0=WATER, 1=GLYCOL)
P52 DIGITAL
LOCAL / REMOTE CONTROL MODE
(0=LOCAL, 1=REMOTE)
P53 DIGITAL UNITS (0=IMPERIAL, 1=SI)
P54 DIGITAL
LEAD/LAG CONTROL MODE
(0=MANUAL, 1=AUTO)
P56 CODED *SYS 1 OPERATIONAL CODE
P57 CODED *SYS 1 FAULT CODE
P58 CODED *SYS 2 OPERATIONAL CODE
P59 CODED *SYS 2 FAULT CODE
P61 CODED **SYS 1 FAN STAGES
P63 CODED **SYS 2 FAN STAGES
P66 ANALOG ANTI-RECYCLE TIME (PROGRAMMED)
P67 ANALOG LEAVING CHILLED LIQUID TEMP CUTOUT
P68 ANALOG LOW AMBIENT TEMP CUTOUT
P70 ANALOG LOW SUCTION PRESS CUTOUT
P71 ANALOG HIGH DISCHARGE PRESS CUTOUT
P72 ANALOG COOLING SETPOINT
P73 ANALOG COOLING RANGE
P74 ANALOG SETPOINT HEATING (YCWL Heatpump Mode)
P75 ANALOG HEATING RANGE (YCWL Heatpump Mode)
* See ISN Operational and Fault code table below.
** For interpretation of fan stages see tables in sections 2.8.1 and 2.8.2.
ISN Transmitted Data
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