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E-64
9 Troubleshooting
9.1 PLC Version Number Check
FX
3G
/FX
3U
/FX
3UC
PLC User's Manual - Analog Control Edition
FX3U-4DA (4-channel Analog Output)
9. Troubleshooting
This chapter describes the troubleshooting methods and error codes.
If the D/A conversion data is not output, or if the proper digital value is not output, check the following items:
• Wiring
• Program
• Error status
9.1 PLC Version Number Check
• Any versions (from Ver.2.20 (initial version) to the latest version) of the FX3U Series are compatible.
• Check the version number of FX
3UC Series. The version number should be 1.30 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.
9.2 Wiring Check
Check the wiring as follows:
1. Power
FX3U-4DA needs driving power. Verify that the power supply line is properly connected. Also check that the
24 V indicator lamp of FX
3U-4DA is on.
2. Analog output line
Use the 2-core twisted shielded cable for the analog output line. In addition, be sure to separate the analog
output line from the other motive power lines or inductive lines.
→ For a detailed description of wiring, refer to Chapter 3.
9.3 Program Check
Check the program as follows:
1. Check the output mode and output data.
Check that data has been set correctly in BFM #0 to #4.
2. Check the settings.
Check that the offset data (BFM #10 to #13), gain data (BFM #14 to #17), upper/lower limit function setting
(BFM #38) and table output function start/stop setting (BFM #80) are correct.