C-22
6 Troubleshooting
6.1 PLC Version Number Check
FX
3U
/FX
3UC
Series PLC User's Manual - Analog Control Edition
FX3U-4AD-ADP (4-channel analog Input)
6. Troubleshooting
This chapter describes the troubleshooting methods and error status.
If the A/D conversion data is not input, or if the proper digital value is not input, check the following items:
• Version number of PLC
• Wiring
• Special devices
• Programs
• Error status
6.1 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-32MT-LT. The version number should be 1.20 or later.
→ For a detailed description of the version number check method, refer to Section 1.3.
6.2 Wiring Check
Check the following items for wiring:
1. Power
4AD-ADP needs driving power. Verify that the power supply line is properly connected. Also check that the
POWER indicator lamp of 4AD-ADP is on.
2. Analog input line
Use the 2-core twisted shielded pair cable for the analog input line. In addition, be sure to separate the analog
input line from the other motive power lines or inductive lines.
3. Use of current input mode
To use the current input mode for a channel, be sure to shortcircuit the line between the V+ terminal and the
I+ terminal ( : channel number) of the channel. If the line is not shortcircuited, data will not be converted
into correct digital data.
→ For a detailed description of wiring, refer to Chapter 3.
To Next Page
Loading...
Need help?
General
