Troubleshooting Telemetry; Modbus Communication - Hach FL900 Serie Manual Básico Del Usuario

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• LED flashes red—the call to the server failed.
Note: If the connection failed, refer to
Figure 12 Call the server
1 Call initiation target
Verify the telemetry with FSDATA Desktop
1. In FSDATA Desktop, select Communications>Modem Diagnostics.
2. Make sure the registration status is either home or roaming. If blank or "identify" is shown, the
connection has failed.
3. Adjust the antenna for optimum signal strength and quality.
4. Click Call Server to make a call to the network.
A pop up screen will indicate success or failure.

Troubleshooting telemetry

• Make sure the SVC is correct.
• Make sure the serial number is registered and active on the host server.
• Make sure the modem is enabled and the Hach IP address has been correctly entered.
• If the problem persists, contact technical support.
Use the mobile SMS option
Configure the FL900 modem to send or receive SMS messages (optional). Refer to FSDATA
Desktop documentation for configuration information.

Modbus communication

The Modbus protocol can be used for communication with this instrument. Attach an external
network device, such as a PLC, to the RS232 interface on the instrument to read data as it is logged.
Contact technical support for more information on Modbus communications.
Note: Historical data cannot be read with Modbus communication.
20 English
Troubleshooting
on page 24 for more information.
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