Adaptive Capacity Control Details Screen - Johnson Controls YORK YK Style G OPTIVIEW Operation And Maintenance

FORM 160.54-O1
ISSUE DATE: 9/10/2014

ADAPTIVE CAPACITY CONTROL DETAILS SCREEN

MODBUS PROTOCOL CONFIGURATION (SOFTWARE VERSION C.OPT.01.19.307 AND LATER)
FIGURE 36 - ADAPTIVE CAPACITY CONTROL DETAILS SCREEN MODBUS PROTOCOL CONFIGURATION
(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 communica-
tions hardware/interface in the Modbus Protocol Con-
figuration (Service Technicians refer to OptiView Con-
trol Center – Service Instructions (Form 160.54-M1)
to determine existing hardware/interface configuration).
This configuration is used in new production chillers af-
ter March 2007. In this configuration, the microboard
communicates directly with the VSD Logic Board us-
ing MODBUS protocol serial communications. The
Microboard performs the ACC function and the ACC
Board is not present. The Motor Communications Proto-
col Setpoint (on the SETUP Screen) is set to MODBUS
in this configuration. Due to service parts replacement,
earlier production chillers could be in the MODBUS
configuration. All Medium Voltage Variable Speed
Drives (MV VSD) use MODBUS protocol.
JOHNSON CONTROLS
SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION
Requires a login access level of SERVICE.
Service Technicians refer to the OptiView
Control Center - Service Instructions
(Form 160.54-M1) for operation instruc-
tions and explanation of all programmable
setpoints and displayed values.
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 to 20mA, 4 to 20mA, 0 to
10VDC or 2 to 10VDC input in Analog Remote mode,
PWM input in Digital Remote mode, E-Link Gateway
interface in ISN Remote mode or locally programmed
value in Local mode.
LD14339
105
2