Mitsubishi Electric MELSEC-FX3S Series - Troubleshooting; PLC Version Number Check; Wiring Check; Special Device Check

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5 Troubleshooting
5.1 PLC Version Number Check
FX 3S /FX 3G /FX 3GC /FX 3U /FX 3UC PLC User's Manual - Analog Control Edition
FX 3U -4AD-PT-ADP (4-channel Platinum Resistance Thermometer Data Input)
A
Common Items
B
FX
3U
-4AD
FX
3UC
-4AD
C
FX
3U
-4AD-ADP
D
FX
3G
-2AD-BD
E
FX
3U
-4DA
F
FX
3U
-4DA-ADP
G
FX
3G
-1DA-BD
H
FX
3U
-3A-ADP
I
FX
3U
-4AD-PT
-ADP
J
FX
3U
-4AD-PTW
-ADP
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 the PLC
• Wiring
• Special devices
• Programs
• Error status
5.1 PLC Version Number Check
• Any versions (from Ver. 1.00 (initial version) to the latest version) of the FX3S Series are compatible.
• Any versions (from Ver. 1.00 (initial version) to the latest version) of the FX
3G Series are compatible.
• Any versions (from Ver. 1.40 (initial version) to the latest version) of the FX
3GC Series are compatible.
• Any versions (from Ver. 2.20 (initial version) to the latest version) of the FX
3U Series are compatible.
• Check the version number of the FX
3UC Series. The version number should be 1.30 or later.
→ For a detailed description of the version check method,
refer to A. Common Items Subsection 5.1.2.
5.2 Wiring Check
Check the following items for wiring:
1. Power
The PT-ADP needs driving power. Verify that the power supply line is properly connected. Also check that the
POWER indicator lamp of the PT-ADP is on.
2. Platinum resistance thermometer sensor cable
Separate the cable of the platinum resistance thermometer from other power cables or inductive cables.
→ For a detailed description of wiring, refer to Chapter 3.
5.3 Special Device Check
Check whether the special devices for the 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. Averaging time
Check that the set averaging time is within the specified range. The averaging time should be set in the range
from 1 to 4095. If the set averaging time is outside the specified range, an error occurs.
3. Error status
Check that no error is detected in the PT-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.