Troubleshooting; Plc Version Number Check; Wiring Check; Special Device Check - Mitsubishi MELSEC-F FX3U Series User Manual

FX /FX Series PLC User's Manual - Analog Control Edition
3U 3UC
FX -4AD-PT-ADP (4-channel Platinum Resistance Thermometer Data Input)
3U
5.

Troubleshooting

This chapter describes the troubleshooting methods and error status.
If the temperature measurement 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
5.1

PLC Version Number Check

• Any versions (from Ver.2.20 (initial version) to the latest version) of the FX
• Check the version number of the FX
→ For a detailed description of the version number check method, refer to Section 1.3.
5.2

Wiring Check

Check the following items for wiring:
1. Power
PT-ADP needs driving power. Verify that the power supply line is properly connected. Also check that the
POWER indicator lamp of PT-ADP is on.
2. Platinum resistance thermometer sensor cable
Separate the cable of the platinum resistance thermometer from the other motive power cables or inductive
cables.
5.3

Special Device Check

Check whether the special devices for PT-ADP are correctly used:
1. Temperature measurement
Verify that the special device for the selected channel is correctly selected. This special device should be
selected depending on the connecting position and the channel.
2. Number of averaging time
Check that the set number of averaging time is within the specified range. The number of averaging time
should be set in the range from 1 to 4095. If the set number of averaging time is outside the specified range,
an error occurs.
3. Error status
Check that no error is detected on PT-ADP.
If an error is detected, check the details of the error, and then check the wiring and programs.
-32MT-LT. The version number should be 1.30 or later.
3UC
→ For a detailed description of wiring, refer to Chapter 3.
→ For a detailed description of special devices, refer to Chapter 4.
5 Troubleshooting
5.1 PLC Version Number Check
Series are compatible.
3U
E-21
A
B
C
D
E
F
G