Rockwell-automation 57C421B Pulsetach Input Module/DCS 5000/AutoMax Uživatelský manuál stáhnout pdf (Strana 47)

5Ć5

Step 5. Verify that the hardware is working correctly.

WARNING

INSERTING OR REMOVING A MODULE OR ITS CONNECTING CABLES MAY

RESULT IN UNEXPECTED MACHINE MOTION. TURN OFF POWER TO THE RACK

BEFORE INSERTING OR REMOVING A MODULE OR ITS CONNECTING CABLES.

FAILURE TO OBSERVE THESE PRECAUTIONS COULD RESULT IN BODILY INJURY.

For local I/O, the problem may be in one of three areas.

Replace these items, one at a time, and determine

whether the problem has been corrected before

attempting to replace the next item. First, replace the

Pulsetach Input module, then the Processor modules,

and finally the backplane.

For remote I/O, determine whether the Pulsetach Input

module is the only module that is not working. If it is not,

the problem is most likely in the remote I/O system. Refer

to JĆ3606 (Remote I/O Communications Module instruction

manual) for additional information. Otherwise, the problem

is most likely in the remote rack. Replace the Pulsetach

Input module, next the slave Remote I/O module, and

finally the backplane. Replace these items one at a time

and determine whether the problem has been corrected

before attempting to swap out the next item.

5.3 Interrupt Problems

Problems with interrupts fall into two categories: either no interrupts

at all or too many (unexpected) interrupts. Because interrupts affect

task execution, many of these problems result in error codes being

displayed on the faceplate of the Processor. Examples of tasks that

use interrupts are shown in chapter 4.

Perform the following checks before you begin troubleshooting the

particular symptom:

WARNING

INSERTING OR REMOVING A MODULE OR ITS CONNECTING CABLES MAY

RESULT IN UNEXPECTED MACHINE MOTION. TURN OFF POWER TO THE RACK

BEFORE INSERTING OR REMOVING A MODULE OR ITS CONNECTING CABLES.

FAILURE TO OBSERVE THESE PRECAUTIONS COULD RESULT IN BODILY INJURY.

Step 1. Verify that the Pulsetach Input module is in the correct

slot as defined in the configuration.

Step 2. Verify that the I/O definitions are correct.

Verify that the configuration correctly defines the registers

on the module.

Step 3. Verify that the application task is correct.

Verify that the application task that uses the symbolic

names defined in the configuration has defined those

names as COMMON.

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