Mitsubishi Electronics MELSEC-F Manuel D’Utilisation
E-64
9 Troubleshooting
9.1 PLC Version Number Check
FX
3G
/FX
3U
/FX
3UC
PLC User's Manual - Analog Control Edition
FX
3U
-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
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 FX
3U
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
FX
3U
-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.
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.
(BFM #38) and table output function start/stop setting (BFM #80) are correct.