F49200 — Excitation group signal fault

F49200 means that the excitation sequence control has signalled a fault. In the conditions the manual lists, an expected feedback signal from the excitation was not received within the monitoring time, or the excitation group signal fault is present directly. Which of these applies is stored bit by bit in the fault value r0949. The signal can also be generated via p6500[59]. Both list manuals that carry this code describe it identically; they differ only in whether the fault value is to be interpreted hexadecimal or binary.

• The excitation sequence control signals a fault: a feedback signal expected from the excitation was not received within the monitoring time, the excitation group signal fault is present, or the switch-on command for the excitation was reset although pulse enable is still available or the excitation current actual value has not yet fallen below a minimum value.
• The signal can also be generated via p6500[59].

1. Check the excitation.
2. Check the commands, feedback signals and BICO interconnections.
3. If bit 4 of the fault value is set, increase the switch-off delay time p1647.

The drive writes the fault value into r0949. The G130/G150 manual asks to interpret the value hexadecimal, the S120/S150 manual binary; the bit assignment is the same:

• Bit 0: When switched off or when switching off the excitation, the signal "excitation ready feedback signal" was not received within the monitoring time.
• Bit 1: After an ON command, the signal "excitation ready feedback signal" was not received within the monitoring time.
• Bit 2: After the pulses were enabled, the signal "excitation operational feedback signal" was not received within the monitoring time.
• Bit 3: The "excitation group signal fault" signal is present.
• Bit 4: The switch-on command for the excitation was reset, although pulse enable (r0899.11) is still available, or the excitation current actual value has still not fallen below a minimum value.

• r0949 — fault value: read it after the fault to see which bit, and therefore which excitation condition, triggered F49200.
• p1647 — excitation switch-off delay time: increase it when bit 4 is set, as the remedy for this fault specifies.

The drive coasts down and must be acknowledged before it will start. Acknowledge the fault immediately once the cause has been remedied.