- Emerson Remote Terminal Unit Instruction Manual

CI-ControlWave Express Appendix E - Display/Keypad / E-1
Appendix E
DISPLAY/KEYPAD ASSEMBLY GUIDE
E1.1 OVERVIEW
Bristol Display/Keypad assemblies provide a built-in, local, user interface for the
ControlWave Express These assemblies allow an operator or engineer to view and modify
variable values and associated status information, via an ACCOL3 Function Block.
Variables can include inputs, process variables, calculated variables, constants, setpoints,
tuning parameters and outputs used in a measurement or control application. Status bits
include alarm state, alarm acknowledge, control, manual, and questionable data.
Setting up the Display/Keypad is a simple matter of configuring a Display Function Block
in the ControlWave Designer project.
The Display/Keypad is comprised of a four line by twenty character liquid crystal display,
with adjustable LCD Contrast, and a 25 button membrane key matrix. Each key has a
microswitch for positive tactile feedback. This means that as you firmly depress the keys,
you will feel it click as it engages. In the case of the ControlWave Express, the
Display/Keypad is located externally to the unit.
Figure 1 - Display/Keypad Assembly – 25 Button Keypad & 4 X 20 Display
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