Johnson Controls YORK YK MaxE User Manual

JOHNSON CONTROLS
88
FORM 160.54-O1
ADAPTIVE CAPACITY CONTROL DETAILS SCREEN
MODBUS Protocol Conguration
(Software version C.OPT.01.19.307 and later)
OVERVIEW
This screen displays detailed information pertaining to
the Adaptive Capacity Control (ACC). It is shown above
with the OptiView-to-VSD serial communications hard-
ware/interface in the “MODBUS protocol conguration”
(Service Technicians refer to OptiView Service Manual
160.54-M1 to determine existing hardware/interface
conguration). This conguration is used in new produc-
tion chillers after March 2007. In this conguration, the
microboard communicates directly with the VSD Logic
Board using MODBUS protocol serial communications.
The Microboard performs the ACC function and the
ACC Board is not present. The Motor Communica-
tions Protocol Setpoint (on the SETUP Screen) is set
to MODBUS in this conguration. Due to service parts
replacement, earlier production chillers could be in the
MODBUS conguration. All Medium Voltage Variable
Speed Drives (MV VSD) use MODBUS protocol.
Requires Login access level of SER-
VICE. Service technicians refer to
YORK Service Manual 160.54-M1 for
setpoint entry instructions and expla-
nation of all programmable setpoints
and displayed values.
OptiView Control Center
LD14339
FIG. 22B
DISPLAY ONLY
% Full Load Amps
Displays the motor current as a percentage of chiller full
load amps as calculated by the microboard from current
values returned from the drive Logic Board.
Current Limit Setpoint
Displays the current limit setpoint value in use. This
value could come from a 0-20mA, 4-20mA, 0-10VDC
or 2-10VDC input in Analog remote mode, PWM in-
put in Digital remote mode, Microgateway interface
in ISN remote mode or locally programmed value in
Local mode.
Motor Run (LED)
Illuminated when the control center is commanding the
drive to run. Otherwise, it is extinguished.
Output Frequency
Displays the frequency at which the drive is operating
the motor. This value is returned from the drive Logic
Board.
Pre-rotation Vanes Position
Displays the present pre-rotation vane position as a value
between 0% (closed) and 100% (full open).

Johnson Controls YORK YK MaxE Specifications

General

Brand	Johnson Controls
Model	YORK YK MaxE
Category	Chiller
Language	English