E-13Â Speed Error / PG Disconnect fault in Toshiba drive
E-13 Speed Error / PG Disconnect fault in Toshiba drive
Description E-13 is specific to drives equipped with a Pulse Generator (PG) or Encoder feedback card. It indicates a "Speed Deviation Error." The drive is commanding the motor to run at (for example) 1000 RPM, but the encoder is telling the drive the motor is running at 0 RPM or 500 RPM. When the difference between "Commanded Speed" and "Actual Speed" exceeds a certain threshold for a set time, E-13 triggers. Causes
1. Encoder Wiring: The most common cause. A wire is loose, A and B channels are swapped, or the power to the encoder is missing.
2. Shaft Coupling: The physical coupling connecting the encoder to the motor shaft is loose or broken. The motor spins, but the encoder does not.
3. Motor Stall: The motor is physically jammed and cannot turn, but the drive is outputting current. The encoder correctly reports 0 RPM, causing the mismatch.
4. Direction Mismatch: The motor is wired to spin Forward, but the encoder is wired in Reverse (A/B swapped). The drive tries to go faster to correct the error, spiraling into a fault. Solution First, verify the motor rotation. Run the drive in V/f mode (open loop) momentarily. Does the motor spin? If yes, check the monitor parameter for "PG Feedback Speed." If the motor is spinning forward but the display shows negative speed or zero speed, your encoder is wired incorrectly. Swap the A and A-not (or A and B) wires.
Inspect the physical mounting. Encoders are fragile. If the encoder shaft is wobbly or the tether mount is loose, the signal will be erratic.
Check the "PG Disconnect Detection Time" parameter. Sometimes, during a very fast startup, the encoder signal lags slightly. Increasing this detection timer (e.g., from 0.1s to 1.0s) can eliminate nuisance trips during acceleration without compromising safety.
Description E-13 is specific to drives equipped with a Pulse Generator (PG) or Encoder feedback card. It indicates a "Speed Deviation Error." The drive is commanding the motor to run at (for example) 1000 RPM, but the encoder is telling the drive the motor is running at 0 RPM or 500 RPM. When the difference between "Commanded Speed" and "Actual Speed" exceeds a certain threshold for a set time, E-13 triggers. Causes
1. Encoder Wiring: The most common cause. A wire is loose, A and B channels are swapped, or the power to the encoder is missing.
2. Shaft Coupling: The physical coupling connecting the encoder to the motor shaft is loose or broken. The motor spins, but the encoder does not.
3. Motor Stall: The motor is physically jammed and cannot turn, but the drive is outputting current. The encoder correctly reports 0 RPM, causing the mismatch.
4. Direction Mismatch: The motor is wired to spin Forward, but the encoder is wired in Reverse (A/B swapped). The drive tries to go faster to correct the error, spiraling into a fault. Solution First, verify the motor rotation. Run the drive in V/f mode (open loop) momentarily. Does the motor spin? If yes, check the monitor parameter for "PG Feedback Speed." If the motor is spinning forward but the display shows negative speed or zero speed, your encoder is wired incorrectly. Swap the A and A-not (or A and B) wires.
Inspect the physical mounting. Encoders are fragile. If the encoder shaft is wobbly or the tether mount is loose, the signal will be erratic.
Check the "PG Disconnect Detection Time" parameter. Sometimes, during a very fast startup, the encoder signal lags slightly. Increasing this detection timer (e.g., from 0.1s to 1.0s) can eliminate nuisance trips during acceleration without compromising safety.
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