【2026 Electric Valve】Operational locally but unable to be controlled remotely

2026-05-07View Original

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5. Normal operation locally but uncontrollable remotely: It can be switched on/off locally, but there is no response from the DCS/remote control. Detection method: 1. Check whether the remote control signal wires and shielding wires are broken or short-circuited ； 2. Check whether the remote passive contacts and 485/communication module are faulty ； 3. Damage to the control cabinet terminals, isolators, and IO modules. Solution: 1. Repair the communication signal cable and ensure proper shielding and grounding ； 2. Replace the communication board, IO module, and signal isolator ； 3. Reconnect to the DCS points and check the logical configuration.

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【2026 Electric Valve】Operational locally but unable to be controlled remotely

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