Rockwell-automation 1771-IMD AC/DC(220V) INPUT Installation Instructio Uživatelský manuál stáhnout pdf (Strana 7)

AC/DC (220V) Input Module Cat. No. 1771-IMD Series B

Publication

17715.27

The front panel of your module contains one green, module active

LED, and 16 red status LED indicators. The 1771-IMD performs

diagnostics in a handshaking mode when first powered up. Upon

successful completion of the diagnostics, the green module active

indicator lights. It turns off if a fault occurs in the data paths or the

opto-isolators.

ACTIVE

Module Active Indicator (green)

00 to 17 Status Indicators (red)

10552I

If a module fault occurs, the module resets its inputs or sets them to

last state, depending on the fault mode selection. The module active

indicator must be on to properly interpret the red status indicators.

The red status indicators are provided for system logic side

indication of individual inputs. When a red indicator lights, voltage

is present on the terminal. The module transfers this information to

the backplane for the processor to read. See ”Troubleshooting” for a

description, probable cause, and recommended action to take for

common faults based on indicator responses.

Use this table to help you interpret the 1771-IMD status indicators

and to troubleshoot module and system faults.

Indicator Status (color) Description of Fault or System Status Action to Take

Module active ON (green) Normal Indication None

Module active ON (green) and

Input status ON (red)

Check for voltage on terminal If none, replace module

Module active ON (green) and

Input status OFF

Input devices not functioning properly or faulty

input circuitry on module

1. Check input devices

2. If input devices are OK, replace module

No voltage on terminal None

Module active OFF Module is not powered or fault in optoisolators

and/or data paths; module resets inputs or goes to

last state

1. Check chassis power supply and module

input power

2. If power supplies are OK, replace module

Module active OFF and

Input status ON (red) or OFF

Not valid unless module active indicator is on;

when active is off, indicators do not represent

processor status

1. Check chassis power supply and module

input power

2. If power supplies are OK, replace module

Interpreting the Status

Indicators

Troubleshooting

1 2 3 4 5 6 7 8

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