Rexroth IndraDrive HCS Error Code F8140

Rexroth PLC & VFD Critical Hardware

Model: IndraDrive HCS | Code: F8140

Applicable Systems
EFC FEX FEI HNC

Symptoms

CDD fatal fault. The CDD (Communication and Drive Diagnostics) module has experienced a fatal error. All safety-related functions are disabled.

Possible Causes

  • CDD module hardware failure
  • CDD firmware corruption
  • Internal communication bus failure between CDD and control board
  • CDD module power supply failure

Troubleshooting Steps

  1. Step 1: Power-cycle the complete drive system
    If F8140 clears, monitor for recurrence; if it returns immediately, CDD hardware is defective
  2. Step 2: Check the CDD module status LED for error indication patterns
    LED pattern matches normal operation; abnormal pattern confirms CDD fault
  3. Step 3: Reload CDD firmware if possible via IndraWorks AS
    Firmware update completes; CDD initializes normally
  4. Step 4: Replace CDD module if firmware reload fails or fault persists
    New CDD module communicates without errors

How to Reset

1) Full power cycle. 2) Check CDD LED. 3) Reload CDD firmware. 4) Replace CDD module. Caution: CDD handles safety functions; do not bypass or operate the drive with CDD faults.

Common Replacement Parts

  • R911319000: CDD module (verify exact part for drive model) (Safety-critical component; use only approved replacements)

Frequently Asked Questions

  • Q: What does the CDD module do?

    The CDD (Communication and Drive Diagnostics) module handles safety communication, drive diagnostics, and safety-relevant signal processing. It is a safety-critical component.

  • Q: Can I bypass the CDD to keep running?

    Absolutely not. The CDD handles safety functions. Bypassing it creates serious safety risks and voids the drive's safety certification.

Related Rexroth Fault Codes

Source: Rexroth IndraDrive HCS/HMS Fault Code List, Bosch Rexroth AG

Category: PLC & VFD