Feedback alarm on an analog axis (parameter FBACKAL).

For differential TTL signal.

• One or more cables broken (A, B signals or their inverted signals).
• Feedback input disconnected at the counter.

For differential sinusoidal signal.

• One or more cables broken (A, B signals or their inverted signals).
• Feedback input disconnected at the counter.
• Input signal amplitude above 1.45 Vpp (approximately).
• Input signal amplitude under 0.4 Vpp (approximately).• Too much phase shift between A and B signals (in quadrature, in theory)

For non-differential signals, the feedback alarm must be disabled.

Check the cables and the connection of the feedback inputs. If the error persists, contact the Service Department.