What causes Okuma OSP alarm 1728?

Program error — M147 clamp commanded after M109 disconnected the C-axis. Operation error — M146/M147 entered in MDI while the C-axis is disconnected. C-axis under control of the opposite turret when the clamp command was issued.

How do I fix Okuma OSP alarm 1728?

1. Read the code number shown with the alarm: code 1 = Clamp/unclamp commanded while the C-axis is not connected; code 2 = Clamp/unclamp commanded to a C-axis controlled by the other turret 2. Read the code: Code 1 means the C-axis was not connected when M146/M147 was commanded; Code 2 means the C-axis belongs to the other turret. 3. For Code 1, check the program sequence — the manual example shows M109 (C-axis disconnect) followed by M147 (clamp); reconnect the C-axis before clamping. 4. If the alarm came from MDI, do not issue M146/M147 manually unless the C-axis is connected; connect it first, then retry. 5. For Code 2, verify which turret currently controls the C-axis and issue the clamp/unclamp from the correct side or after control is transferred. 6. If the alarm persists with correct programming and operation, record the code and contact Okuma service.

Okuma OSP codes

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Okuma OSP Controller

Program/G-code · Intermediate

Alarm 1728

Okuma OSP Alarm A 1728 - C-axis clamp/unclamp command not possible

A C-axis clamp or unclamp command (M147/M146) was issued while the C-axis was not connected, or to a C-axis currently controlled by the other turret. The command is rejected because the C-axis is not in a state where clamping is valid.

Okuma OSPProgram/G-codeIntermediate

1728

Okuma OSP Alarm A 1728 - C-axis clamp/unclamp command not possible

C-axis clamp/unclamp command not possible

Common Causes

Program error — M147 clamp commanded after M109 disconnected the C-axis
Operation error — M146/M147 entered in MDI while the C-axis is disconnected
C-axis under control of the opposite turret when the clamp command was issued

Troubleshooting Steps

1Read the code number shown with the alarm: code 1 = Clamp/unclamp commanded while the C-axis is not connected; code 2 = Clamp/unclamp commanded to a C-axis controlled by the other turret
2Read the code: Code 1 means the C-axis was not connected when M146/M147 was commanded; Code 2 means the C-axis belongs to the other turret.
3For Code 1, check the program sequence — the manual example shows M109 (C-axis disconnect) followed by M147 (clamp); reconnect the C-axis before clamping.
4If the alarm came from MDI, do not issue M146/M147 manually unless the C-axis is connected; connect it first, then retry.
5For Code 2, verify which turret currently controls the C-axis and issue the clamp/unclamp from the correct side or after control is transferred.
6If the alarm persists with correct programming and operation, record the code and contact Okuma service.

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