184
8chapter
Human-machine
interface
Presentation :
• Man machine dialog according to machine
operation
• Command and interface solutions (push buttons
or terminals)
• Screens configuration software
Summary
8. Human-machine
interface
185
1
2
3
4
5
6
7
8
9
10
11
12
M
8.1
Human-machine interface setup
186
8.2
Human-machine interfaces
188
8.3
Discrete control and indicator units
188
8.4
Schneider Electric Discrete Control and Indicator Unit offer
191
8.5
Advanced human-machine interfaces
191
8.6
Exchange modes
195
8.7
Development software
196
8.8
Conclusion
197
8.1 Human-machine interface setup
8. Human-machine
interface
186
Operators play an important part in the human-machine dialogue.They must use
the information they have to perform actions that make the machines and
installations run properly without endangering safety and availability. It is
therefore crucial that the interfaces and dialogue functions are designed to ensure
that operations can be performed reliably in all circumstances.
8.1
Human-machine interface setup
b Information flow in the human-machine interface
A human-machine interface (C Fig.1) uses two information flows in two
directions:
- Machine –> Human
- Human –> Machine
These flows are independent yet linked.
v Independent
Because their content can be on different levels.
The levels are defined by the designer of the automation system according
to the requirements of the process and what the user wants, such as discrete
signals from the operator to the machine, alphanumerical or animated diagram
messages from the machine to the operator.
v Linked
Because the automation system interprets an operator action on a control
interface as a specifically defined action and, in return, emits information
that depends on whether the action was properly performed or not. The
operator can either act by his own decision (stop production, modify data,
etc.) or in response to a message from the machine (alarm, end of cycle,
etc.).
b Role of the operator
The operating interface includes all the function