AMCI SD17060B User Manual - Page 16

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Indexer Problems

Symptom

My indexer/PLC reports a fault

from the SD17060B when every-

thing seems fine.

The motor is running faster/

slower than expected and/or the

distance traveled is farther/

shorter than expected.

Driver Problems

Symptom

Both LED's are off, and the Fault

Output is active. (Not conduct-

ing) Power is applied to the

driver.

Both LEDs are green, the Fault

Output is inactive, (conducting)

but the motor is not powered.

STEP/FAULT

The

not blink when the indexer sends

pulses to the driver. The motor

does not turn.

STEP/FAULT

The

TROUBLESHOOTING

Solution

Your logic may be reversed. On the SD17060B, the Fault Output is on

(conducts current) when the driver is working correctly and turns off (stops

current flow) when there is a fault with the driver. Therefore, losing power

to the driver appears as a fault. If you're expecting the fault output to turn

on and conduct current when there is a fault, then your logic is reversed.

Most likely a problem with the SD17060B's Step Resolution setting or

the indexer's programming. If the motor is running too fast, the Step

Resolution on the SD17060B is set lower than the indexer's program-

mer assumed it would. If the motor is running slow, the Step Resolu-

tion is set higher than the indexer programmer assumed it would be.

Solution

1) The AC line voltage may be too low. It must be greater than 85Vac

for the SD17060B to operate properly.

2) One or both of the 10A fuses may be blown. These fuses will not

blow under normal circumstances, so call AMCI for assistance.

Blown fuses may be a sign of serious installation problems.

1) The ±Disable input may be active. The active state, (power applied

or power removed), is set by DIP switch SB1-4. This switch may be

set incorrectly.

2) The Idle Current Reduction may be set to its To 0% setting. With

this setting, current is removed from the motor if a directional pulse

is not received for one second.

LED does

1) Verify that your two directional inputs on the Indexer Connector are

not swapped or cross-wired.

2) If the inputs are wired as a sinking or sourcing instead of differential,

verify that they are wired correctly. If your indexer has sourcing out-

puts, then the inputs of the SD17060B must be wired as sinking

inputs and vice versa. Also note, if you are using an older

SD17060B-24, or an SD17060B-25, the outputs must be at 24Vdc.

3) If you are using a 24Vdc system and you are converting from an

older SD17060B to a newer SD17060B, you must remove the

external 3.9K resistors from your wiring. Refer to the

Units

LED is red.

The driver is experiencing a fault condition. All faults are latched, so

power must be cycled to the driver or the Disable Input must be tog-

gled before the fault will clear.

1) Over Temp Fault. Is the driver very hot? It shuts down when its

internal temperature exceeds 90°C (195°F).

2) Interlock Fault. The motor is not plugged into the driver or a wire

jumper was not installed between the two Interlock pins on the

Motor Connector.

3) Short in Motor. Shut off the SD17060B and disconnect the motor.

Pull back the rubber boot and verify the following with an ohmmeter.

a) Open circuit from "A+" to "B+" pins. (Tests for short between

phases.)

b) Open circuit from "A+" to "Earth Ground" and "B+" to "Earth

Ground". (Tests for short between phase and case.)

If any of these readings is not an open circuit, then check your wir-

ing. The most common cause of a short between phases is cross-

wiring the phases when wiring the connector. If you see a phase-to-

case short, make sure you don't have a stray wire from the "B+" or

"A-" terminals hitting the Earth Ground terminal on the connector.

section on page 3 to determine the age of you driver.

ADVANCED MICRO CONTROLS INC.

Applicable