Updated 6/16/2016
Copyright Apeks LLC, 2014
22
Automation Systems Overview
4.1.1.
The Human Machine Interface (HMI) is a 10 inch color touch screen. Almost all of
the inputs, outputs and human/machine interactions are managed through the HMI.
The features are not controlled or reported through the Diaphragm Compressor or
the Chiller.
4.1.2.
The HMI has two functions; 1) to provide information and 2) to accept inputs from
the operator. Description of some of the interaction is here:
4.1.2.1. If a display value or message is colored orange, an operator must take action
before progressing forward.
4.1.2.1.1. Orange indicates that an operator activity is required before the Start button
can be depressed. Messages highlighted orange are indicative of a
scheduled maintenance interval being reached.
4.1.2.2. Red messages indicate that a component of the system has either failed to reach
the minimum operating pressures or temperatures, or that it exceeded the
programmed operating limits. Red messages are typically reserved for alarms
that could potentially shut down the machine if the condition causing the alarm is
not returned to normal.
4.1.2.2.1.1.
Red messages may require user acknowledgement or may simply
disappear when an abnormal condition returns to normal parameters. If
there is a button that appears, user intervention will be required.
4.1.2.3. Yellow messages will typically be displayed on a button that has to be pressed to
acknowledge that the operator has read the message before it will disappear.
4.1.3.
Any variable or message that needs to be (or can be) controlled by the operator are
graphically raised to illustrate that the “message” is a button. An example of the
different graphical representations is shown below.
Figure 23. Indicator vs. button
4.1.1. The controller has safety interlocks programmed into it. These safety interlocks prevent
unsafe operations from occurring by always monitoring the systems parameters and by
removing unsafe action/input control buttons from the HMI. When buttons appear to be
missing from the home screen, it is because the system is performing an operation that
would be unsafe in combination with the missing button/action.
4.1.2. The HMI will provide message popups (in yellow boxes) to instruct the operator what
steps are required next in order in to complete any action selected. Most message
popups are also acknowledgement buttons that must be pressed before any further
action can be taken.
4.1.3. The primary operating valves on the 2000-5LD, 20LD, 5LDx5LD, and 20LDx20LD are
air actuated valves controlled by the systems controller. In the event of an air
compressor failure or a power failure all air actuated valves will return to their normal
resting state. Valves 0 and 17B will be open and all others will be closed.
4.1.4. Each air actuated valve has an indicator on the top to inform the operator which valves
are open and which ones are closed. The indicator lines correspond with the flow
direction. The following figure illustrates both and open and closed valve. Note that it
Title/Output Display
with solid edge
Input Button with
Chamfered edge
Summary of Contents for 2000 PSI Series
Page 49: ...Updated 6 16 2016 Copyright Apeks LLC 2014 49 ...
Page 50: ...Updated 6 16 2016 Copyright Apeks LLC 2014 50 Appendix C CO2 Phase Diagram ...
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Page 52: ...Updated 6 16 2016 Copyright Apeks LLC 2014 52 Appendix D Training Process ...
