2 System description
14 | 266 MODBUS® multivariable transmitter User manual 2105216 Rev. AB
User interface
The on-board Human Machine Interface (HMI) consists of a Liquid Crystal Display (LCD) and keypad. The HMI can be used to
obtain feedback from the local push button operations and as a configuration tool. The display screen is dot matrix and the
menu system is driven with the 4-button keypad. Changes can also be made to transmitter parameters via MODBUS
®
communications. Go to Appendix C, MODBUS
®
register lists for specific MODBUS
®
register information.
During normal operation, the operation screen (Figure 9) provides current values and operational information from the
transmitter.
Figure 9: Operation screen (Operator Page 1)
HMI keypad
The local LCD display (Figure 10) is used to access the configuration and management menus. The left and right soft keys
(Items 1 and 3) allow users to perform the selected action, which is displayed immediately above the soft keys on the LCD (item
5). Options include Select, Exit, Edit, or Back. The up and down soft keys (items 2 and 4) allow users to scroll up or down and to
select values from parameter lists. Access to the Main Menu is achieved by pressing the right soft key. Access to the Operator
Menu is achieved by pressing the left soft key.
Figure 10: Local HMI display
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