What causes Okuma OSP alarm 1782?

Faulty emergency OFF delay timer relay. Faulty NC axis control ON relay. Faulty PLC axis control ON relay. Wiring error in the relay-controlled power circuit.

How do I fix Okuma OSP alarm 1782?

1. Read the code number shown with the alarm: code 3 = A problem occurred during the power ON/OFF sequence.; code 4 = A problem occurred in the NC axis control ON relay circuit.; code 14 = A problem occurred in the PLC axis control ON relay circuit. 2. Read the code: 3 means a problem during the power ON/OFF sequence, 4 means a problem in the NC axis control ON relay circuit, 14 means a problem in the PLC axis control ON relay circuit. 3. For code 3, inspect the emergency OFF delay timer relay; the manual directs changing this timer relay when the power sequence fails. 4. For code 4 or 14, inspect the corresponding NC or PLC axis control ON relay: check its coil voltage, contact condition and that it pulls in during the power-on sequence. 5. Trace the relay-controlled power circuit wiring for loose terminals, burnt contacts or a miswired relay base. 6. Replace the faulty timer relay or axis control ON relay as the manual directs, then run the power-on sequence and confirm each relay actuates in order.

Okuma OSP codes

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Okuma OSP Controller

Power Supply · Intermediate

Alarm 1782

Okuma OSP Alarm A 1782 - Power sequence error

A problem occurred in the machine's power ON/OFF sequence or in an axis control ON relay circuit, as identified by the code. The relay-controlled power circuit did not complete its expected sequence, so the control cannot enable the axes.

Okuma OSPPower SupplyIntermediate

1782

Okuma OSP Alarm A 1782 - Power sequence error

Power sequence error

Common Causes

Faulty emergency OFF delay timer relay
Faulty NC axis control ON relay
Faulty PLC axis control ON relay
Wiring error in the relay-controlled power circuit

Troubleshooting Steps

1Read the code number shown with the alarm: code 3 = A problem occurred during the power ON/OFF sequence.; code 4 = A problem occurred in the NC axis control ON relay circuit.; code 14 = A problem occurred in the PLC axis control ON relay circuit.
2Read the code: 3 means a problem during the power ON/OFF sequence, 4 means a problem in the NC axis control ON relay circuit, 14 means a problem in the PLC axis control ON relay circuit.
3For code 3, inspect the emergency OFF delay timer relay; the manual directs changing this timer relay when the power sequence fails.
4For code 4 or 14, inspect the corresponding NC or PLC axis control ON relay: check its coil voltage, contact condition and that it pulls in during the power-on sequence.
5Trace the relay-controlled power circuit wiring for loose terminals, burnt contacts or a miswired relay base.
6Replace the faulty timer relay or axis control ON relay as the manual directs, then run the power-on sequence and confirm each relay actuates in order.

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