Solidot EtherCAT Bus Valve Terminal Communication Troubleshooting and Solutions

When using Solidot EtherCAT bus valve terminals (C2S or C2P series), configuration is performed via PLC software. This article details troubleshooting steps for communication failures.

1. Status Confirmation

• Observe the RUN light blinking continuously without entering OP state.

2. Cause Analysis

Failure to enter normal operation may result from:

(1) Power sequence error: System side and field side not powered simultaneously or in reverse order.
(2) Configuration mismatch between software settings and physical product.

3. Solution Examples

【Case 1】

Issue: EtherCAT valve terminals require simultaneous power-on or field-side-first power sequence. The terminal automatically scans solenoids to configure driver chips. If field-side powers on last, communication fails (defaults to 24-bit configuration).

Solution:

• Option 1: Power field side first, then system side (separate power supplies).

• Option 2: For shared power supply (4 wires), connect same-polarity wires to identical terminals without jumper tabs to ensure simultaneous startup.

【Case 2】

Issue: Configuration mismatch (e.g., configuring C2S-EC-12B for actual C2S-EC-24B valve terminal).

Solution:
Delete incorrect configuration, rematch model settings, download new configuration, and power-cycle the valve terminal.