F01630 — SI P1 (CU): Brake control error

The drive-integrated Safety Integrated function (SI) on the Control Unit (CU) has detected a brake control fault and has initiated a STOP A. The fault is raised on the CU's safety monitoring channel P1, so it concerns the monitored control of the motor holding brake — including a Safe Brake Module or Safe Brake Adapter where one is fitted. The exact trigger is coded in the fault value; the list below decodes it and the following sections say what to check and how to acknowledge.

• The motor cable is not shielded correctly.
• A defect in the control circuit of the Motor Module — one manual words this as a defect in the brake control circuit of the Motor Module.

Beyond these general causes, each fault value points to specific causes such as a missing brake, wire breakage, a ground fault in the brake cable or a short-circuit in the brake winding; see the fault value list.

1. Check parameter p1278 — when Safe Brake Control (SBC) is used, only p1278 = 0 is permissible.
2. If power units are connected in parallel, check the setting of the power unit data set used to control the holding brake (p7015).
3. Select Safe Torque Off and then de-select it again.
4. Check the connection of the motor holding brake.
5. Check the function of the motor holding brake.
6. Check whether there is a DRIVE-CLiQ communication error between the Control Unit and the Motor Module involved and, if required, carry out a diagnostics routine for the faults identified.
7. Check that the electrical cabinet design and cable routing comply with the EMC regulations — for example, the shields of the motor cable and brake conductors are connected with the shield connecting plate and the motor connectors are tightly screwed to the housing.
8. Replace the Motor Module involved.
9. During operation with a Safe Brake Module or Safe Brake Adapter: check its connection and, if required, replace the Safe Brake Module or Safe Brake Adapter.

The drive writes the cause into r0949; read the value as a decimal number (manuals that print a message value show it as %1). Match it against this list:

• 10, 11 — fault in "open holding brake" operation: parameter p1278 incorrectly set; no brake connected or wire breakage (check whether the brake releases for p1278 = 1 and p9602/p9802 = 0, i.e. with SBC deactivated); ground fault in the brake cable.
• 20 — fault in "brake open" state: short-circuit in the brake winding.
• 30, 31 — fault in "close holding brake" operation: no brake connected or wire breakage (check whether the brake releases for p1278 = 1 and p9602/p9802 = 0, i.e. with SBC deactivated); short-circuit in the brake winding.
• 40 — fault in "brake closed" state; the manual lists no separate cause.
• 50 — fault in the brake control circuit of the Control Unit or communication fault between the Control Unit and the Motor Module (brake control diagnostics).
• 80 — Safe Brake Adapter: fault in the brake control circuit of the Control Unit or communication fault between the Control Unit and the Motor Module (brake control diagnostics).
• 90 — brake released for service purposes (X4).

• r0949 (fault value): read the stored fault value here and interpret it as a decimal number — the list above decodes it for this code.
• p1278 (brake control diagnostics evaluation): check the setting — with SBC only 0 is permissible; the wire-break test runs with p1278 = 1.
• p9602 (SI enable Safe Brake Control, Control Unit): set to 0 together with p9802 to deactivate SBC during the wire-break test.
• p9802 (SI enable Safe Brake Control, Motor Module): the Motor Module counterpart of p9602 in the same test.
• p7015 (holding brake circuit in the power unit data set): check this setting when power units are connected in parallel.

The drive executes an OFF2 and the motor coasts down. Acknowledge the fault immediately by switching the power supply off and on again (POWER ON); the drive only restarts after this acknowledgement. If the fault returns, work through the checks above before the next start attempt.