Rockwell-automation 57C435 Processor Module, AutoMax Uživatelský manuál stáhnout pdf (Strana 33)

5Ć7

5.5 Incorrect Data

Problem: The data used by application tasks is either always off,

always on, or different than expected. The possible causes of this are

the following: a module in the wrong slot, a programming error, or a

malfunctioning module.

Step 1. Verify that all inputs to the rack are wired to the correct

devices.

Confirm that all connections at the terminal strip are tight.

Connect a voltmeter to the proper points on the terminal

strip and toggle each device. Verify that the device is

generating the correct voltage or current, depending upon

the module you are testing. If the voltage or current is

incorrect, there is a problem with the external device, its

power supply, or the wiring to the terminal strip.

Check the cable for continuity between the faceplate

connector and the terminal strip.

Step 2. Verify that the input circuit on each input module is

working correctly.

Toggle the input devices to verify that the LED associated

with each is also toggling. If it is not toggling, either the

LED or the input module itself is malfunctioning.

Step 3. Verify that each module can be accessed.

Connect the personal computer to the rack and run the

ReSource AutoMax Programming Executive.

Stop all programs that may be running.

Use the I/O Monitor function to display the individual I/O

points or registers on the module, whichever is

appropriate. If the points can be monitored, the problem

lies in the application software (refer to steps 4 and 5). If

the points cannot be monitored, the problem lies in the

software (go on to step 6).

Step 4. For all modules in the rack, verify that the configuration

references the correct slot and register locations. For

remote I/O installations, also verify that the master slot and

drop number are referenced correctly.

Step 5. Verify that the application programs running in the rack

are correct.

Check to see that the application programs that reference

the symbolic names associated with the hardware in the

rack have declared those names COMMON.

Step 6. Verify that the hardware is working correctly.

To test local I/O, systematically swap out the module in

question and the Processor module(s). If the problem

persists, take all of the modules except the module in

question and one Processor out of the rack. If the problem

is now corrected, one of the other modules in the rack is

causing the problem. Reconnect the other modules one at

a time until the problem reappears. If none of these tests

reveals the problem, replace the backplane.

To test the remote I/O system, first verify that the remote

I/O system is communicating with the drop that contains

the module being tested. Next, by systematically

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