F07986 — Drive: Rotating measurement ramp-function generator

F07986 is raised when problems with the ramp-function generator occur while the rotating measurements are running. The fault value the drive stores in r0949 — to be interpreted as a decimal number — identifies what went wrong; the manuals describe one value: 1, meaning the positive and negative directions are inhibited. In response to the fault the drive brings the motor to a standstill, and the message must be acknowledged before the drive will start again.

• During the rotating measurements, problems occurred with the ramp-function generator.
• Fault value 1: the positive and negative directions are inhibited — both direction inhibits, signalled via p1110 and p1111, are active while the measurement needs to run the ramp-function generator.

1. Read the fault value in r0949 and interpret it as a decimal number.
2. For fault value = 1: enable the direction — check the signal linked to p1110 (inhibit negative direction) and the signal linked to p1111 (inhibit positive direction) and clear the active inhibit so the direction is available to the measurement again.

• The drive writes the fault value to r0949; interpret it as a decimal number.
• 1: The positive and negative directions are inhibited.

• r0949 — fault value of this message; read it here and interpret it as a decimal number to see which ramp-function generator problem occurred.
• p1110 — BI: inhibit negative direction; for fault value 1, enable the negative direction again by clearing the inhibit signalled at this input.
• p1111 — BI: inhibit positive direction; likewise, clear an active inhibit here so the positive direction is enabled.

Correct the cause first, then acknowledge the fault — acknowledgement is possible immediately, with no waiting time. The drive has ramped down to a standstill as the fault response; once the message is acknowledged, it accepts a new start command.