Fault Conditions; Major Faults; Minor Faults - Allen-Bradley PanelView 1200 Series User Manual

Operator terminals

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Chapter 2

PanelView 1200 Terminal Functions

Fault Conditions

2-2

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With the optional Remote Keyswitch Assembly, you can access the Mode

Select Keyswitch and RS-232 port from the front of the rack where the

PanelView 1200 terminal is mounted.

For more information on the Remote Keyswitch Assembly, see the

instruction sheet supplied with that option.

There are two types of faults: major faults and minor faults.

If the PanelView 1200 terminal detects a major fault, it enters Major Fault

mode, and displays a message in the Major Fault Window, like this:

While in Major Fault mode, the PanelView 1200 terminal cannot control or

monitor PLC controller functions. The operator must correct the problem

and restart the terminal, or switch modes.

In Run mode, the faults logged to the Major Fault Window cannot be

cleared. If the terminal is set to Configuration mode, the Major Faults

detected on power-up will be logged to the Minor Fault Window and can

be cleared from there.

While the PanelView 1200 terminal is in Major Fault mode, it appears as a

faulted rack to the host PLC controller. You can design your PLC program

to monitor the rack fault bits that correspond to the PanelView 1200

terminal's rack assignments, and to respond whenever these bits indicate

that the terminal isn't operating or communicating properly. See your PLC

controller and I/O scanner user's documentation for details on how to use

the rack fault bits.

If the PanelView 1200 terminal detects any minor faults, it disables normal

input entry and displays a message in the Minor Fault Window, like this:

20201

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