For lag errors (E40), check the LVDT connector. Ensure the cable shielding is correctly grounded to prevent electrical noise from corrupting the feedback signal. Step 4: Check for Mechanical Binding
| Fault Code | Fault Type / Cause | Troubleshooting / Solution | | :--- | :--- | :--- | | | Drive power unit undervoltage alarm. | Check the external 380V main power supply and DC bus voltage; or replace the HCS power unit. | | F2077 | Current detection error; hardware failure. | Likely a faulty Hall current sensor or current calculation circuit in the CSB control unit. | | F2816 | DC bus failure. | Check the 380V power supply and the DC bus wiring. | | C0270 | Motor encoder data reading error. | Check the encoder feedback line at the motor, along the cable, and at the CSB interface. | | E8260 | Torque overload. | Reduce acceleration and increase the corresponding limit values (S-0-0082, S-0-0083, etc.); or add an external braking resistor. | | F09 | General soft fault. | Typically resolved by simply restarting the PPC controller. | | F21 & F22 | Parameter/configuration issues. | These almost always appear during the initial debugging and setup phase. | | F23 | Inconsistent RAM data. | Occurs when a PPC spare part is replaced. Turn the controller off and then back on to resolve. | | F29 | Incorrect password. | The password settings are incorrect. Ensure the correct password is being used. |
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The Rexroth PPCR221 is a high-performance motion control system designed for a wide range of industrial applications. While it's a reliable and efficient system, like any complex technology, it's not immune to faults and errors. When issues arise, it's essential to quickly identify and diagnose the problem to minimize downtime and optimize system performance. This is where Rexroth PPCR221 fault codes come into play.
The (and the specific variant PPCR22.1 ) uses a 4-character alphanumeric display to communicate its operating state and error conditions. These codes are divided into startup/initialization states (negative numbers) and functional fault codes (typically starting with "F" or "E"). 🔌 Power-On / Startup Errors For lag errors (E40), check the LVDT connector
The internal power transistors (MOSFETs) inside the PPCR221 have exceeded safe thermal limits.
If the controller stops at any of these negative numbers during power-up, it indicates a hardware or initialization failure. Common Cause / Solution to -07 CPU Initialization CPU or RAM test failed. Replace control unit. -08 CPU Malfunction Often indicates a motherboard or processor failure. -10 to -2X System Startup Problem loading the operating system from the CF card. E1 Processor Fault | Check the external 380V main power supply
Solution: Review and validate the axis allocation tables inside your programming workspace.