Operation description for HMI 7-inch touch screen
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Part 5: Operation description for HMI 7-inch touch screen
5.1. Overview
The 7-inch touch screen controller is developed for modular water-cooled chiller and heat pump, and the user can
configure and modify the unit’s parameters through the human-machine interface and can see the running data and the
program data through the touch screen. The data is displayed in a metric unit, Chinese or English. The human-machine
interface of the touch screen is connected with unit’s control board for communication through the RS485 port.
There is a switch in the upper right corner of the touch-screen panel, which is used for inputting password to enter
different access configuration permissions.
5.2. Key and function display
The operator can control the whole unit through the touch screen to obtain running data, program’s setting value and
system’s command. The liquid crystal display adopts the graphic display module with the backlight, and the
corresponding action can be triggered by clicking on corresponding image or button on the touch screen. The touch key
is divided into function key and programming key.
Function key:
In order to allow the user to see as much data as possible on the display screen, the programmer has designed a
multi-interface way to describe the operation condition of the unit. The function keys are used for interface switching.
You can switch to the corresponding interface by pressing the function key.
Programming key:
In the modifiable interface, you can click the corresponding item to modify the parameters. For example, if you
click the numeric parameter, the numeric keypad will jump out, and you can select the number and click OK; For the
selecting class parameters, it will only need to select the correct option in the pop-up dialog box; For the switch class
variable, the OK prompt box will pop up when the item is clicked, and the status can be switched after clicking OK. If
the input value is within the allowed range, the value will be accepted by the system. If the cancel-key is pressed, the
modification to the current setting value will be cancelled, and it can also be used as the option key to select the setting
value to be modified.
The followings are the arrangement and interrelation of all interfaces.
Main interface
System state
System configuration
Module status
Fault
Diagnosis
Schedule
Human-machine interface
5.3. Key and function display
Cooke Industries - Phone: +64 9 579 2185 Email: [email protected] Web: www.cookeindustries.co.nz
