E-09Â AM Terminal fault in Toshiba drive
E-09 AM Terminal Fault (Analog Output) fault in Toshiba drive
Description Similar to E-08, the E-09 fault corresponds to the AM (Ammeter) analog output terminal. This is the second analog output channel on G9, H9, and AS1 drives. It typically outputs a 0-10V or 4-20mA signal proportional to motor current or voltage. E-09 signifies a short circuit or hardware overload on this specific terminal. Causes
1. Wiring Error: The AM terminal was accidentally connected to a 24V source or shorted to CC (Common).
2. Overload: Driving too many panel meters in parallel from a single output, causing the total impedance to drop below the drive's drive capability.
3. Noise: Induced voltage spikes on unshielded signal cables back-feeding into the analog output. Solution Remove the wiring from the AM terminal. Reset the drive.
Check the external load. Toshiba drives typically rate their analog outputs for 0-1mA or 4-20mA with a specific max load resistance. If you are driving a PLC input, ensure the PLC input is not configured as a "Current Source" that pushes voltage back into the drive.
If the port is blown (E-09 persists without wires), you must disable the output in the parameters or replace the board. To prevent this, always install a signal isolator (transducer) between the VFD analog output and external systems, especially if they share different grounds.
Description Similar to E-08, the E-09 fault corresponds to the AM (Ammeter) analog output terminal. This is the second analog output channel on G9, H9, and AS1 drives. It typically outputs a 0-10V or 4-20mA signal proportional to motor current or voltage. E-09 signifies a short circuit or hardware overload on this specific terminal. Causes
1. Wiring Error: The AM terminal was accidentally connected to a 24V source or shorted to CC (Common).
2. Overload: Driving too many panel meters in parallel from a single output, causing the total impedance to drop below the drive's drive capability.
3. Noise: Induced voltage spikes on unshielded signal cables back-feeding into the analog output. Solution Remove the wiring from the AM terminal. Reset the drive.
Check the external load. Toshiba drives typically rate their analog outputs for 0-1mA or 4-20mA with a specific max load resistance. If you are driving a PLC input, ensure the PLC input is not configured as a "Current Source" that pushes voltage back into the drive.
If the port is blown (E-09 persists without wires), you must disable the output in the parameters or replace the board. To prevent this, always install a signal isolator (transducer) between the VFD analog output and external systems, especially if they share different grounds.
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