Mitsubishi Electric FX3U-232-BD User Manual page 14

FX Series PLC User's Manual - Data Communication Edition
5. Communication Setting in FX Programmable Controller
5.1 Communication Setting Methods .............................................................................................. D-40
5.2 Communication Setting Using Parameter Method (GX Works2) .............................................. D-41
5.2.1 Operating procedure.................................................................................................................. D-41
5.3 Communication Settings Using Parameter Method (FXGP/WIN) ............................................. D-43
5.3.1 Operating procedure.................................................................................................................. D-43
6. Control Procedures and Setting Methods
6.1 Data Flow by Link...................................................................................................................... D-45
6.2 Important Points in Computer Link............................................................................................ D-46
6.2.1 Operations of PLC caused by data transfer .............................................................................. D-46
6.3 How to Understand Control Procedure ..................................................................................... D-47
6.4 Basic Formats of Dedicated Protocol........................................................................................ D-47
6.4.1 Control procedure format 1........................................................................................................ D-48
6.4.2 Control procedure format 4........................................................................................................ D-49
6.4.3 Contents of set items in each control procedure (protocol) ....................................................... D-50
6.4.4 Time-out time setting ................................................................................................................. D-53
6.5 Transfer Sequence Time Chart and Communication Time....................................................... D-54
6.5.1 When computer reads data from PLC ....................................................................................... D-54
6.5.2 When computer writes data to PLC........................................................................................... D-54
6.5.3 Transfer time in transfer sequence............................................................................................ D-55
6.6 Transfer Data in Character Area ............................................................................................... D-56
6.6.1 When bit device memory is read or written ............................................................................... D-56
6.6.2 When word device memory is read or written ........................................................................... D-57
7. Commands
7.1 BR Command [Reads Device Memory in 1-Bit Units]............................................................... D-59
7.2 WR Command [Reads Device Memory in 1-Word Units] ......................................................... D-60
7.3 QR Command [Reads Device Memory in 1-Word Units] .......................................................... D-62
7.4 BW Command [Writes Device Memory in 1-Bit Units] .............................................................. D-64
7.5 WW Command [Writes Device Memory in 1-Word Units]......................................................... D-65
7.6 QW Command [Writes Device Memory in 1-Word Units] ......................................................... D-67
7.7 BT Command [Tests Device Memory in 1-Bit Units (by Writing Arbitrarily)] ............................. D-69
7.8 WT Command [Tests Device Memory in 1-Word Units (by Writing Arbitrarily)]........................ D-70
7.9 QT Command [Tests Device Memory in 1-Word Units (by Writing Arbitrarily)] ........................ D-72
7.10 RR/RS Command [Remotely Sets PLC to RUN/STOP Mode] ............................................... D-73
7.10.1 Contents of remote control to set RUN or STOP mode........................................................... D-73
7.10.2 Condition validating remote control to set RUN or STOP mode.............................................. D-73
7.10.3 Remote control specification method and specification examples .......................................... D-74
7.11 PC Command [Reads PLC Model Name]............................................................................... D-75
7.11.1 PLC model name (CPU) and read contents ............................................................................ D-75
7.11.2 Control procedure specification method and specification example........................................ D-75
7.12 GW Command [Offers Global Function] ................................................................................. D-77
7.12.1 Contents of control .................................................................................................................. D-77
7.12.2 Global function control procedure specification method and specification example ............... D-77
7.13 On-demand Function .............................................................................................................. D-78
7.13.1 Special data registers and special auxiliary relays used in on-demand function..................... D-78
7.13.2 Control procedures in on-demand function ............................................................................. D-80
7.13.3 On-demand function specification method and specification examples .................................. D-82
7.14 TT Command [Loop-back Test] .............................................................................................. D-85
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Table of Contents
D-40
D-45
D-58