Adaptive Capacity Control Details Screen; Figure 41 - Adaptive Capacity Control Details Screen Modbus Protocol Configuration - York YK-EP B Operation & Maintenance Manual

SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION

ADAPTIVE CAPACITY CONTROL DETAILS SCREEN

FIGURE 41 - ADAPTIVE CAPACITY CONTROL DETAILS SCREEN MODBUS PROTOCOL CONFIGURATION

OVERVIEW
This screen displays detailed information pertaining
to the Adaptive Capacity Control (ACC). It is shown
above with the OptiView-to-VSD serial communi-
cations hardware/interface in the Modbus Protocol
Configuration. In this configuration, the microboard
communicates directly with the VSD Logic Board us-
ing MODBUS protocol serial communications. The
Microboard performs the ACC function. The Motor
Communications Protocol Setpoint (on the SETUP
Screen) is set to MODBUS in this configuration. All
Medium Voltage Variable Speed Drives (MVVSD) use
MODBUS protocol.
Requires a login access level of SERVICE.
98
MODBUS PROTOCOL CONFIGURATION
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 or SC-EQ
communications interface in ISN Remote mode or lo-
cally 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.
FORM 160.87-OM1
ISSUE DATE: 8/24/2018
LD14339
JOHNSON CONTROLS