代碼 PRIO-494: Modbus Active Close
問題描述與安全警告
Fanuc R-30i Series Robot Controller 觸發了嚴重的 Modbus Active Close 警報。需要由合格的操作員或維修技師立即處理，以防止在製造週期中對設備造成二次損壞或導致零件報廢。在接觸電氣控制箱之前，請務必確保遵循標準安全和停機掛牌 (LOTO) 程序。
官方故障排除步驟
Cause: A Modbus TCP master device is trying to establish a connection with the robot Modbus slave, but the server is already using all available connections. This is a warning alarm and will only be posted the first time this happens after each power-cycle. Per the Modbus TCP protocol, when a new connection request arrives and there are no unused connections, the oldest connection will be closed, and the new connection request will be accepted. Remedy: Increase the number of connections using the Modbus TCP screen.
Source: FANUC Robot R-30iA Alarm Code List Operator's Manual
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
關於 Fanuc R-30i Series Robot Controller 警報
由 Fanuc 製造的工業控制器具有廣泛的診斷系統，用於保護內部電路和機械連桿。當 R-30i Series Robot Controller 出現類似 PRIO-494 的錯誤代碼時，通常表示指令值與實際感測器回饋之間存在不匹配。
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