Mitsubishi MELSEC-A AJ71E71-S3 User manual

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PROGRAMMABLE CONTROLLER
hmlwc-A
User's Manual
Computer link/multidrop link module
type
AJ71 UC24
(Supplement)
CATALOG #JUM-454
$15.00
MlTSUBlSHl
ELECTRIC
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REVISIONS
'The manual number is aiven onthe bottom left of the back cover.
Print Date *Manual Number Revision
IB
(NA) 66454-A First edition
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INTRODUCTION
Thank you for choosing the Mitsubishi MELSEC-A Series of General Purpose Programmable Control-
lers. Please read this manual carefully so that the equipment is used to its optimum. A copy of this
manual should beforwarded to the end User.
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CONTENTS
COMMON INFORMATION
. . 1 . GENERAL DESCRIPTION ............................................. 1 - 1 1 5
1 . 1
Contents of This Manual ................................................. 1 - 2
1.2
Features ............................................................... 1-3
1.2.1
Control operations usingthe multidrop link function .................... 1 - 4
2 .
SYSTEM CONFIGURATIONS .......................................... 2 - 1 . 2 . 7
2.1 Overall Configuration .................................................... 2 - 1
2.2
Applicable Systems ...................................................... 2 - 2
2.3
System Configurations and Available Functions (When Usingthe Computer Link
Function)
............................................................... 2-3
2.3.1 1
: 1 ratio of an external device (computer. etc.) to a PC CPU ........... 2 - 3
2.3.2 1
: n ratio of an external device (computer. etc.) to PC CPUs ............ 2 - 3
2.3.3 2
: 1 ratio of external devices (computer. etc.) to a PC CPU ............. 2 - 3
2.3.4 2
: n ratio of external devices (computer, etc.) to PC CPUs .............. 2 - 3
2.3.5
m : n ratio of external devices (computer. etc.) to PC CPUs ............. 2 - 3
2.4
When Selecting a Multidrop Link Function .................................. 2 - 4
2.4.1
When using an AJ71 UC24 as a master station ......................... 2 - 4
2.4.2
When using an AJ71UC24 as a local station ........................... 2 - 5
2.5
When Using a Multidrop Link Function and a Computer Link Function
Simultaneously
.......................................................... 2 - 6
(
2.6 Precautions Regarding System Configurations .............................. 2 - 7
COMPUTER LINK FUNCTION
. 3 . SPECIFICATIONS ................................................... 3 - 1 . 3 30
3.1 General Specifications ................................................... 3 - 1
3.2 Performance Specifications ............................................... 3 - 2
3.2.1
Transmission specifications ......................................... 3 - 2
3.2.2
RS-232C connector specifications ................................... 3 - 3
3.2.3 RS-4221485
interface specifications .................................. 3 - 3
3.2.4 RS-422
cable specifications ......................................... 3 - 3
3.3
Data Communications Functions .......................................... 3 - 4
........... 3.3.1 Functions available using dedicated protocols and commands
3 - 4
3.3.2
Functions available inthe no-protocol mode .......................... 3 - 11
3.3.3
Functions available inthe bidirectional mode ......................... 3 - 11
3.3.4
Transmission error data read function ............................... 3 - 11
3.4
Mode Switching Function During ComputerLink Operations .................. 3 - 11
3.4.1
Precautions when mode switching .................................. 3 - 12
3.4.2
Procedure for switching the mode from an external device ............. 3 - 18
3.4.3
Procedure for switching the mode from a PC CPU ..................... 3 - 21
3.5
Data Communications Transmission Control Function ....................... 3 - 24
(
3.6
110 Signals List for CPU ................................................. 3 - 24
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.................................
3.7 Buffer Memory Applications and Allocation 3 - 27
...................
4 .
SETTINGS AND PROCEDURES BEFORE OPERATION
4 . 1 . 4 . 9
I
..................................
4.1 Settings and Procedures before Operation 4 - 1
...............................
4.2 Nomenclature and LED Signals and Dispalys 4 - 2
.....................................................
4.2.1 Nomenclature 4 - 2
4.2.2 LED signals and displays
........................................... 4 - 3
................................................................
4.3 Settings 4-5
4.3.1 Setting the dedicated protocol, no-protocol mode. or bidirectional mode
... 4 - 5
4.3.2 Setting of transmission specifications. main channels and terminal
resistance
........................................................ 4-5
.............................................
4.3.3 Station number setting 4 - 7
.....................................
4.3.4 Terminal resistance connections 4 - 7
..................................................
4.4 Loading and Installation 4 - 8
...............................................
4.4.1 Handling instructions 4 - 8
............................................
4.4.2 Installation environment 4 - 8
..
.........................................................
4.5 External Wmng 4 - 8
...........................................
4.5.1 Precautions during wiring 4 - 8
.................................
4.5.2 Connecting the RS-232C connectors 4 - 8
...............................
4.5.3 Connecting the RS-4221485connectors 4 - 9
4.5.4 Connecting a multidrop link and setting modes and terminal resistance
... 4 - 9
4.6 Self-IoopbackTest ....................................................... 4-9
4.7 LoopbackTest
.......................................................... 4- 9
..............................................
1
4.8 Maintenance and Inspection 4 - 9
5 .
HALF-DUPLEX COMMUNICATIONS USING THE RS-232C INTERFACE ........... 5 - I
6 .
DATA COMMUNICATIONS USING AN M:N MULTIDROP LINK ................... 6 - 1
7. INITIALSETTING OF TRANSMISSION CONTROL DATA TO BUFFER
MEMORY
........................................................... 7-1 -7-8
Setting RS-232C CD Terminal Check EnableIDisable
........................ 7 . 1
Setting the Transmission Method for RS-232C
.............................. 7 . 1
.......................................... Reading Transmission Error Data 7 . 1
Settings in the No-Protocol Mode
.......................................... 7 . 1
Settings in the Bidirectional Mode
......................................... 7 . 1
..................................................
Mode Switching Setting 7 . 2
7.6.1 Reading inthe mode setting state
.................................... 7 - 2
.........................................
7.6.2 Mode switching designation 7 - 2
Transmission Control Setting
............................................. 7 - 6
Reading RS-232C Signal Data
................... ; ........................ 7 - 6
Reading the Mode Setting Switch/Station Number Setting Switch Status
........ 7 - 7
7.10 Reading the Transmission Specification Setting Switch Statuses
............... 7 - 8
8 .
COMMUNICATIONS USING DEDICATED PROTOCOLS .................. 8 - I . 8 - 13
......................
D
8.1 Data Flow in Communications with Dedicated Protocols 8 - 1
...................................................... 8.2 Programming Hints 8-1
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8.2.1 To write data to the special applications area inbuffer memory ..........8 - 1
8.2.2 PC CPU operation during data communications ........................8-1
8.2.3 Precautions during data communications
.............................. 8-1
8.3 Basics of Dedicated Protocol Control Procedures
............................ 8-1
8.4 Basic Formats of Dedicated Protocol
....................................... 8-1
8.4.1 Control format 1
................................................... 8-1
8.4.2 Control format 2
................................................... 8-1
8.4.3 Control format 3
................................................... 8-1
8.4.4 Control format
4 ................................................... 8-1
8.4.5 Setting protocol data ...............................................8-2
8.5 Transmission Sequence Timing Charts and CommunicationsTime .............8-3
8.6 Character Area DataTransmission
........................................ 8-4
8.7 Device Memory ReadIWrite
............................................... 8-5
8.7.1 Commands and device ranges .......................................8-5
8.7.2 Batch read in units of bits
........................................... 8-8
8.7.3 Batch read inunits of words
......................................... 8-8
8.7.4 Batchwrite in units of bits
.......................................... 8-8
8.7.5 Batchwrite in units of words
........................................ 8-8
8.7.6 Testing device memory inunits of bits (random write) .............
8.7.7 Testing device memory inunits of words (randomwrite) ..........
8.7.8 Monitoring device memory ....................................
8.8 Extension File Register Read and Write ..............................
8.8.1 ACPU common commands and addresses ......................
8.8.2 AnA dedicated commandsand device numbers ..................
8.8.3 Precautions during extension file register read/write .............
8.8.4 Batch read of the extension file register (ACPU commoncommand) ......
8.8.5 Batchwrite of the extension file register (ACPU commoncommand) 8-9
8.8.6 Direct readof the extension file register (AnACPU dedicated command) ..8
- 9
8.8.7 Direct write of the extension file register (AnACPU dedicated command) ..8
- 9
8.8.8 Testing (random write) the extension file register (ACPU common
command) ........................................................8-9
8.8.9 Monitoringthe extension file register
................................. 8-9
8.9 Buffer Memory Readand Write ............................................8-9
8.10 Special Function Module Buffer Memory Read and Write
..................... 8-9
8.11 Remote RunIStop of PC CPU and Reading PC CPU Model Name
.............. 8-9
8.11.1 Commands .......................................................8-9
8.11.2 Remote RUNISTOP
............................................... 8 -10
8.11.3 Reading PC CPU model name
...................................... 8 -10
8.11.4 Reading PC CPU model name and itscode
.......................... 8 -10
8.12 Program ReadlWrite
.................................................... 8 -11
8.12.1 Precautions during program readlwrite
............................... 8 -11
8.12.2 Program readlwrite control procedures ..............................8 -12
8.12.3 Parameter memory readlwrite
...................................... 8 -12
8.12.4 Sequence program readlwrite
...................................... 8 -12
8.12.5 Microcomputer program readlwrite
.................................. 8 -13
8.12.6 Comment memory readlwrite 8 -13
4
.......................................
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..............................
8.12.7 Extension comment memory readlwrite 8 - 13
........................................................
8.13 Global Function 8-13
....................................................
8.14 On-demand Function 8 - 13
.........................................................
8.15 LoopbackTest 8-13
9 . COMMUNICATIONSWITH A COMPUTER INTHE NO-PROTOCOL MODE
......... 9 - 1
9.1 Basics of the No-ProtocolMode .....................................
9.2 Handshake IlOSignals .............................................
9.3 Programming Hints ................................................
9.3.1 To write data to the special applications area in buffer memory
....
9.3.2 Precautions during data communications ........................
9.4 Basic Programto ReadIWrite Buffer Memory ..........................
9.5 Receiving Data inthe No-Protocol Mode (External Device
+ AJ71UC24) .
9.6 Sending Data inthe No-ProtocolMode (AJ71UC24
+ External Device) . .
...........................
10. COMMUNICATIONS INTHE BIDIRECTIONAL MODE 10 - 1
...............................................
10.1 Bidirectional Mode Basics 10 - 1
....................................10.2 Handshake Signals and Buffer Memory 10 - 1
.....................................................
10.3 Programming Hints 10 - 1
10.3.1 System configuration and communications mode for bidirectional mode
. .
commun~cat~ons..................................................10-1
10.3.2 To write data to the special applications area in buffer memory
......... 10 - 1
10.3.3 Precautions during data communications
............................. 10 - 1
....................................
I
10.4 Bidirectional Control Procedure Basics 10 - 1
.....................................
10.5 Bidirectional Communications Basics 10 - 1
10.6 Processing an AJ71UC24 for Simultaneous Send in Full-Duplex Mode .........10
- 1
10.7 Basic Programto ReadIWrite Buffer Memory
............................... 10 - 1
10.8 Receiving Data inthe Bidirectional Mode (Computer
+ AJ71UC24) .......... 10 - 1
10.9 Transmitting Data inthe Bidirectional Mode (AJ71UC24
+ Computer) ......... 10 - 1
..............................................
11 . TROUBLESHOOTING 11 - 1 . 11 . 4
11 . 1 NAK Error Codes with Dedicated Protocols ................................11 - 1
....
...,
11.2 Bidirectional Mode Error Codes ....................
11.3 Troubleshooting ..................................
MULTIDROP LlNK FUNCTION
12
. SPECIFICATIONSFOR MULTIDROP LINK FUNCTION ...
12.1 Transmission Specifications .......................
12.2 RS-4221485Interface Specifications ................
12.3 RS-422 Cable Specifications .......................
13. SETTINGS AND PROCEDURES BEFORE OPERATION ...
13.1 Settings and Procedures before Operation ...........
........
D
13.2 Nomenclature and LED Signals and Displays
13.2.1 Nomenclature ..............................
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