Mitsubishi Electric FX3G User Manual page 431

FX /FX /FX /FX /FX
3S 3G 3GC 3U 3UC
FX -4AD-PTW-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 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 FX
• Any versions (from Ver. 1.00 (initial version) to the latest version) of the FX
• Any versions (from Ver. 1.40 (initial version) to the latest version) of the FX
• Any versions (from Ver. 2.20 (initial version) to the latest version) of the FX
• Check the version number of the FX
5.2 Wiring Check
Check the following items for wiring:
1. Power
The PTW-ADP needs driving power. Verify that the power supply line is properly connected. Also check that
the POWER indicator lamp of the PTW-ADP is on.
2. Platinum resistance thermometer sensor cable
Separate the cable of the platinum resistance thermometer from other power cables or inductive cables.
5.3 Special Device Check
Check whether the special devices for the PTW-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 PTW-ADP.
If an error is detected, check the details of the error, and then check the wiring and programs.
PLC User's Manual - Analog Control Edition
Series. The version number should be 1.30 or later.
3UC
→ For a detailed description of special devices, refer to Chapter 4.
→ For a detailed description of the version check method,
refer to A. Common Items Subsection 5.1.2.
→ For a detailed description of wiring, refer to Chapter 3.
5 Troubleshooting
5.1 PLC Version Number Check
Series are compatible.
3S
Series are compatible.
3G
Series are compatible.
3GC
Series are compatible.
3U
J-27
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