Mitsubishi Electronics MELSEC-F

/FX

3UC

PLC User's Manual - Analog Control Edition

Table of Contents

FX3U-4AD (4-channel Analog Input)

FX3UC-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 (FX3U-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