Publication 1769-UM005A-EN-P
Diagnostics and Troubleshooting
5-3
Power-up Diagnostics
At module power-up, a series of internal diagnostic tests are performed.
These diagnostic tests must be successfully completed or the module
status LED remains off and a module error results and is reported to the
controller.
Channel Diagnostics
When an input channel is enabled, the module performs a diagnostic
check to see that the channel has been properly configured. In addition,
the channel is tested on every scan for configuration errors, over-range
and under-range, and broken input conditions.
Invalid Channel Configuration Detection
Whenever a channel configuration word is improperly defined, the
module reports an error. See pages 5-4 to 5-7 for a description of module
errors.
Out-of-Range Detection
When the input signal data received at the channel word is out of the
defined operating range, an over-range or under-range error is indicated
in input data word 7.
Possible causes for an out-of-range condition include:
•
The temperature is too hot or too cold for the RTD being used.
•
The wrong RTD is being used for the input type selected, or for the
configuration that you have programmed.
•
The input device is faulty.
•
The signal input from the input device is beyond the scaling range.
If module status
LED is:
Indicated
condition:
Corrective action:
On
Proper Operation
No action required.
Off
Module Fault
Cycle power. If condition persists, replace the module.
Call your local distributor or Rockwell Automation for
assistance.
IMPORTANT
There is no under-range error for direct resistance inputs
because 0 is a valid number.
Содержание Compact 1769-IR6
Страница 1: ...Compact I O RTD resistance Input Module Catalog Number 1769 IR6 User Manual AB PLCs ...
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Страница 40: ...Publication 1769 UM005A EN P 3 16 Installation and Wiring ...
Страница 74: ...Publication 1769 UM005A EN P 4 34 Module Data Status and Channel Configuration ...
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Страница 116: ...Publication 1769 UM005A EN P February 2001 2001 Rockwell International Corporation Printed in the U S A ...