Delta RMC101 Uživatelský manuál stáhnout pdf (Strana 625)

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101

Troubleshooting 7.2

Support and Troubleshooting 7-1

7.2.2 Error Handling

The RMC reports errors to the Programmable Controller within one control loop of detection.

Errors are reported by setting bits in the affected axis’s Status word and turning on the

appropriate LEDS. The Programmable Controller is responsible for checking errors by reading

the Status words. It is up to the Programmable Controller to determine what should be done if an

error is detected.

The system must be able to shut down the axis drive power using a normally open output that is

held closed when the system is running. This contact should be in series with an operator

emergency off button. If power to the rack is lost, the contact will open and the axes will stop. If

an error occurs in the RMC, the contact can be deactivated, which stops the axes. Usually the

Programmable Controller will not take so drastic a step until it has determined that all control is

lost. A Halt command to the axis with an error can take care of most error conditions.

When two axes are making a coordinated move and one axis starts moving slower than it should,

it is best to issue a Halt command to both axes to stop all movement until the problem with the

faulty axis has been resolved.

You can also use Auto Stop detection by setting the appropriate bits in the SOFT STOP the

HARD STOP bytes corresponding to the error bits in the Status word.

7.2.3 RMC Module Problems

Control program cannot access parameters or operate module

1. Module not configured properly. Refer to the topics on your communication type. Use the online

help’s table of contents to find these topics.

2. Make sure the Programmable Controller is accessing the correct I/O registers.

Axis LEDS are red

This indicates the transducer is not responding to the module. Every millisecond the module

interrogates the transducer’s position. If the transducer does not respond correctly, the red axis

LEDs are turned on. Check the transducer power supply and the wires to the transducer.

During a move, the Actual Position is erratic

Electrical noise or a defective transducer is usually the cause of this problem. Monitor bits 13, 14,

and 15 of the axis’s Status word to determine if the module is detecting a transducer error. To

reduce electrical noise check the following:

1. Make sure the transducer wiring is separated from all other wiring.

2. Add a termination resistor (220 ohm for Temposonics I) as close to the transducer as possible.

3. Connect the shield at the module end, the transducer end, or both.

During a move, the drive comes to a halt for no apparent reason

When the RMC detects a 'transducer not responding' error it makes a Hard Stop. See 'Actual

Position is erratic' above for more information. If any of the following conditions are enabled, the

axis will also halt:

Following Error

1 2 ... 620 621 622 623 624 625 626 627 628 629 630 ... 950 951

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