Erhardt-leimer Do 3001 Manual -

The manual includes a binary error table. Blink code 2-4-1 translates to: Sensor cable break on the emitter side.

Without the manual, that blink code is just a confusing light show. With it, diagnosis takes 90 seconds. Erhardt-leimer Do 3001 Manual

The manual reveals that via the RS-485 port (Modbus RTU), you can upload/download parameters using E+L's "ELS-300" software or a generic terminal. Command :RDP 01 returns all parameters as a text string. This is a lifesaver when replacing a failed unit. The manual includes a binary error table

Unlike modern touch-screen controllers, the DO 3001 uses a parameter code system. The manual includes a table of numeric codes (e.g., P01 = proportional gain, P02 = integral time, P03 = deadband width, P04 = sensor type selection). To change a parameter, the user holds a “Set” or “Prog” button, enters a code via arrow keys, and adjusts the value. Without the manual, that blink code is just

Calibration procedure from the manual:

Troubleshooting charts in the manual address common errors: “E-01” (sensor signal out of range), “E-02” (motor amplifier fault), “E-03” (limit switch active).