beautypg.com

Chapter 8, Troubleshooting, Before you begin – Rockwell Automation CHPS-250 Linear Stage Installation User Manual

Page 55: Ptc thermal signal, Table 5 - ptc thermistor signal characteristics, Hall effect module, Chapter

background image

Rockwell Automation Publication CHPS-UM001D-EN-P - July 2014

55

Chapter

8

Troubleshooting

Before You Begin

The following test equipment is required:

Ohm meter
Two-channel storage oscilloscope

PTC Thermal Signal

At ambient room temperature, approximately 25

°

C (77 °F), check that the

resistance measurement between PTC Temp+ and Common (pins 13 and 14,
respectively) on the feedback connector is

750

Ω

.

The table lists increase in resistance at higher temperatures outside the normal
operating temperature envelope.

Table 5 - PTC Thermistor Signal Characteristics

Hall Effect Module

Use this procedure to verify the Hall Effect module is operating properly.

1. With drive power OFF, verify the Hall circuit is properly connected to the

drive by using stage and drive interface wiring specifications.

2. Disconnect stage power leads from the drive.
3. Apply power to the Hall device by setting the drive control power to ON.
4. Use an oscilloscope to check waveforms at S1, S2 and S3 at the feedback

connector.

Topic

Page

Before You Begin

55

PTC Thermal Signal

55

Hall Effect Module

55

Hall to Back EMF Phasing

57

Motor Coil Resistance Measurements

58

Temperature °C (°F)

Resistance in Ohms

Up to 100 (212)

750

Up to 105 (221)

7500

Up to 110 (230)

10,000

This manual is related to the following products: