Serial NO. : H01117023-EN
Date of Editing : 2021-07-09
Questions : Why AR-727CM is online in website, but could not connect to 701ServerSQL?
If your device is online status in the website, it represent that the operation of TCP/IP works normally, please refer to Paragraph 8-4-2 of 701ServerSQL Manual to confirm the configuration of AR-727CM, then following the solutions below to solve connection issue.
|Old configuration,disconnect suddenly||New device cannot connect|
Solution1. Confirm the Connection Information
(1) Please confirm whether the port of 727CM has been occupied by other devices, the default value is CH1/Port1621 and CH2/Port1623, it should display one 1621 port being connected in red frame field only.
*AR-727CM shall display 1621 port is connected by one IP Address while plenty of controllers are connected.
(2) Confirm the version of AR-727CM, if your version is between 5.0-5.2, it should be update to version 5.3 to repair the connection issue.
Solution2. Confirm the Wiring of AR-727CM and Controller
Firstly, we should confirm the wiring is correct, the malfunction of RS-485 communication of specific controller will cause the disconnection; if all controllers are disconnected, then please check whether the wiring is too antiquated.
*Also can use volt‑ohm‑milliammeter to confirm the voltage, above 3V is normal status.
Solution3. Confirm the Configuration
There is a possibility that the configuration of wiring is correct but the length is too long, it is recommended to add an AR-485REP-V3 per 300 meter, refer to the on-site interference.