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PLC User's Manual - Analog Control Edition
Table of Contents
FX3U-4AD (4-channel Analog Input)
FX
3UC-4AD (4-channel Analog Input)
1. Outline B-3
1.1 Outline of Functions .....................................................................................................................B-3
1.2 Setup Procedure Before Starting Operation ................................................................................B-4
1.3 Connectable PLC and Version Numbers .....................................................................................B-5
1.4 Compatible Programming Tool Version Number .........................................................................B-5
2. Specifications B-6
2.1 Generic Specifications .................................................................................................................B-6
2.2 Power Supply Specifications........................................................................................................B-7
2.3 Performance Specifications .........................................................................................................B-7
2.4 Input Mode (Characteristics) BFM #0 ..........................................................................................B-8
3. Wiring B-10
3.1 Terminal Layout .........................................................................................................................B-11
3.2 Cable and Terminal Tightening Torque......................................................................................B-12
3.2.1 Power cable (FX3UC-4AD) .........................................................................................................B-12
3.2.2 Cable (FX
3U-4AD)......................................................................................................................B-12
3.2.3 Cable (FX3UC-4AD)....................................................................................................................B-13
3.3 Examples of Power Supply Circuit.............................................................................................B-14
3.3.1 FX3U-4AD...................................................................................................................................B-14
3.3.2 FX3UC-4AD ................................................................................................................................B-15
3.3.3 Cautions regarding connection of power cables.........................................................................B-15
3.4 Analog Input Line .......................................................................................................................B-16
3.4.1 FX3U-4AD...................................................................................................................................B-16
3.4.2 FX3UC-4AD ................................................................................................................................B-17
3.5 Grounding ..................................................................................................................................B-17
4. Analog Input B-18
4.1 Analog Input Procedures............................................................................................................B-18
5. Buffer Memory (BFM) B-20
5.1 Assignment of Unit Numbers and Outline of Buffer Memory .....................................................B-20
5.2 Buffer Memory Reading/Writing Method ....................................................................................B-22
5.2.1 Buffer memory direct specification (FX3U, FX3UC PLC only).....................................................B-22
5.2.2 FROM/TO instruction (FX3G, FX3U, FX3UC PLC)......................................................................B-22
5.3 Buffer Memory List (BFM) ..........................................................................................................B-23
5.4 Buffer Memory Details................................................................................................................B-27
5.4.1 BFM #0: Input mode specification ..............................................................................................B-27
5.4.2 BFM #2 to #5: Averaging time....................................................................................................B-28
5.4.3 BFM #6 to #9: Digital filter setting...............................................................................................B-29
5.4.4 BFM #10 to #13: Channel data...................................................................................................B-30
5.4.5 BFM #19: Data change disable ..................................................................................................B-31
5.4.6 BFM #20: Initialization function (resetting to factory default status) ...........................................B-31
5.4.7 BFM #21: Input characteristics writing........................................................................................B-31
5.4.8 BFM #22: Convenient function setting........................................................................................B-32
5.4.9 BFM #26: Upper/lower limit error status.....................................................................................B-34
5.4.10 BFM #27: Abrupt change detection status ...............................................................................B-35