Rockwell-automation 61C501 AutoMax/AutoMate 115V Input Module Bedienungsanleitung PDF herunterladen (Seite 19)

5Ć1

5.0 DIAGNOSTICS AND

TROUBLESHOOTING

This section explains how to troubleshoot the module and field

connections.

5.1 Incorrect Data

Problem: The data is either always off, always on, or different than

expected. The possible causes of this are a module in the wrong slot,

a programming error, or a malfunctioning module. It is also possible

that the input is either not wired or wired to the wrong device. Use the

following procedure to isolate the problem:

Step 1. Verify that the input module is in the correct slot and, for

DCS 5000/AutoMax systems, that the I/O definitions are

correct.

Verify that the slot number being referenced agrees with

the actual slot number of the module. In the DCS

5000/AutoMax systems, this module's register number is

always zero. Verify that the bit number refers to the proper

bit. Note that the bit number and the wire number are not

the same.

For remote I/O installations, (DCS 5000/AutoMax systems

only) also verify that the master slot and remote drop

number are defined correctly.

Step 2. Verify that the input is wired to the correct device.

Confirm that all connections at the terminal strip are tight.

Connect a voltmeter to the proper points on the terminal

strip and toggle the device. The voltmeter should alternate

between 0 and 115 volts. If this does not happen, there is

a problem with either the external device, the power

supply, or the wiring to the terminal strip.

Check the cable for continuity between the faceplate

connector and the terminal strip.

Step 3. Verify that the module can be accessed.

Connect the programming terminal to the system and run

the ReSource Software. Use the MONITOR I/O function in

DCS 5000/AutoMax systems, or the POINT MONITOR

function in AutoMate systems. Toggle the input device to

determine whether the bit is changing state.

If the programmer is able to read the input, the problem is

in the application software (proceed to step 4). If the

programmer cannot read the inputs, the problem is in the

hardware (proceed to step 5).

Step 4. Verify that the user application program is correct.

For DCS 5000/AutoMax systems verify that the application

program that references the symbolic names associated

with the module has declared those name COMMON (or

global in V4.0 and later ladder tasks) in application tasks.

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