8.12 Isn Control; Table 12 - Isn Received Data; Table 13 - Isn Transmitted Data - York YCAS0130 Installation, Operation & Maintenance Manual

RECEIVED DATA (CONTROL DATA)
The microprocessor receives 8 data values from the
ISN. The fi rst 4 are analog values and the last 4 are
digital values. These 8 data values are used as con trol
pa ram e ters when in RE MOTE mode. When the unit is
in LO CAL mode, these 8 values are ignored. If the unit
re ceives no valid ISN trans mis sion for 5 min utes it will
re vert back to all local control values. Table 12 lists
the 4 control pa ram e ters. These values are found under
fea ture 54 on the ISN.
TABLE 12 – ISN RECEIVED DATA
ISN CONTROL DATA
PAGE
P03 SETPOINT
P04 ISN Current Limit
P05 —
P06 —
P07 START/STOP COMMAND (0 = STOP, 1 = RUN)
P08 —
P09 —
P10 HISTORY BUFFER REQUEST
(0 = CURRENT DATA, 1 = LAST HISTORY DATA)
TABLE 13 – ISN TRANSMITTED DATA
ISN
Character
Page
P11 8-11
P12 12-15
P13 16-19
P14 20-23
P15 24-27
P16 28-31
P17 32-35
P18 36-39
P19 40-43
P20 44-47
P21 48-51
P22 52-55
P23 56-59
P24 60-63
P25 64-67
P26 68-71
YORK INTERNATIONAL

8.12 ISN CONTROL

Type
Analog Leaving Chilled Liquid Temp
A Return Chilled Liquid Temp
Mixed Chilled Liquid Temp (optional) - YCAS
A Leaving Hot Liquid Temp - YCWS
Hot Liquid Temp - Heat Recovery
A Sys 1 Suction Temperature
A Sys 1 Discharge Temperature
A Ambient Air Temperature
A Sys 1 Oil Temperature
A Sys 1 Oil Pressure
A Sys 1 Suction Pressure
A Sys 1 Discharge Pressure
A Sys 1 % Full Load Amps
A Sys 1 Total Run Hours
A Sys 1 Total Number of Stats
A Sys 1 Anti-Recycle Timer
A Anti-Coincident Timer
A Sys 2 Oil Temperature
TRANSMITTED DATA
After receiving a valid transmission from the ISN, the
unit will transmit either op er a tion al data or history buf-
f er data de pend ing on the "History Buffer Re quest" on
ISN PAGE 06. Data must be trans mit ted for every ISN
page un der fea ture 54. If there is no value to be sent to
a par tic u lar page, a zero will be sent. Tables 13 and 14
show the data val ues and page listings for this unit.
DXST Chiller Data
FORM 201.19-NM1 (204)
8
189