York YCAS0373SC, Installation Operation & Maintenance

Page: 178 / 192

178 YORK INTERNATIONAL
FORM 201.19-NM5 (804)
Micro Panel Contents
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.
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.
8.12 ISN CONTROL
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)
ISN
Page
Character Type DXST Chiller Data
P11 8-11 Analog Leaving Chilled Liquid Temp
P12 12-15 A Return Chilled Liquid Temp
P13 16-19 A
Mixed Chilled Liquid Temp (optional) - YCAS
Leaving Hot Liquid Temp - YCWS
Hot Liquid Temp - Heat Recovery
P14 20-23 A Sys 1 Suction Temperature
P15 24-27 A Sys 1 Discharge Temperature
P16 28-31 A Ambient Air Temperature
P17 32-35 A Sys 1 Oil Temperature
P18 36-39 A Sys 1 Oil Pressure
P19 40-43 A Sys 1 Suction Pressure
P20 44-47 A Sys 1 Discharge Pressure
P21 48-51 A Sys 1 % Full Load Amps
P22 52-55 A Sys 1 Total Run Hours
P23 56-59 A Sys 1 Total Number of Stats
P24 60-63 A Sys 1 Anti-Recycle Timer
P25 64-67 A Anti-Coincident Timer
P26 68-71 A Sys 2 Oil Temperature
TABLE 13 –
ISN TRANSMITTED DATA