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6 Troubleshooting

FX

3G

/FX

3U

/FX

3UC

 PLC User's Manual - Analog Control Edition

FX

3U

-4DA-ADP (4-channel analog Output)

This chapter describes the troubleshooting methods and error status.
If analog data is not output, or if the proper analog value is not output, check the following items:
• Version number of PLC
• Wiring
• Special devices
• Programs
• Error status

• Any versions (from Ver.2.20 (initial version) to the latest version) of the FX

3U

 Series are compatible.

• Check the version number of FX

3UC

 Series. The version number should be 1.20 or later.

• Any versions (from Ver.1.00 (initial version) to the latest version) of the FX

3G

 Series are compatible.

→ For a detailed description of the version number check method, refer to Section 1.3.

Check the following items for wiring:

The 4DA-ADP needs driving power. Verify that the power supply line is properly connected. Also check that
the POWER indicator lamp of the 4DA-ADP is on.

Use the 2-core twisted shielded pair cable for the analog output line. In addition, be sure to separate the
analog output line from other power lines or inductive lines.

→ For a detailed description of wiring, refer to Chapter 3.

Check whether the special devices for the 4DA-ADP are being used correctly:

Verify that the special device for switching the output mode is correctly set.
Turn off the device to set the output mode to the voltage output mode. Turn on the device to set the output
mode to the current output mode.

Check that the special device of the selected channel is correctly selected. This special device should be
selected depending on the connected position and the channel.

Check that no error is detected in the 4DA-ADP.
If an error is detected, check the details of the error, and then check the wiring and programs.

→ For a detailed description of special devices, refer to Chapter 4.