Troubleshooting, Troubleshooting -2, Module diagnostic errors -2 – Rockwell Automation 1746-HSCE2 Multi-Channel High Speed Counter Module User Manual

Page 84: Module diagnostic errors, Counter

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Publication 1746-UM002B-EN-P - August 2004

5-2 Start Up, Operation, Troubleshooting, and Debug Mode

Figure 5.1 LED Locations

Troubleshooting

Three types of module-generated errors can occur:

• module diagnostic errors
• module programming errors
• application errors.

The Fault LED indicates a module diagnostic error.

The counter status bytes indicate application errors encountered by
the module.

Module Diagnostic Errors

A module diagnostic error is produced if the power up self-test or
run-time-watchdog test fails. This is an indication of a potential
hardware failure.

When it detects a diagnostic error, the module halts all operations.
Outputs are reset to zero, and a fault indication is sent to the SLC
processor. The module fault LED turns solid red.

In response to a diagnostic error, cycle power. If the condition
persists, replace the module.

COUNTER

1

0

2

3

OUTPUT STATUS

INPUT STATUS

FLT

RUN

A1

B1

Z1

A2

B2

Z2

HSCE2

Output Status

Running Status

Fault Status

Input Status

Fault LED

Problem

Solid Red

Module diagnostic error. Cycle power. If condition persists, replace
the module. Refer to “Module Diagnostic Errors” below.

Flashing Red

Module output fuse has been tripped.

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