Mitsubishi Electric FX2N-485-BD User manual

FX2N-485-BD COMMUNICATION BOARD
USER'S MANUAL

HEAD OFFICE: MITSUBISHI DENKI BLDG MARUNOUCHI TOKYO 100 TELEX: J24532 CABLE MELCO TOKYO
HIMEJI WORKS: 840, CHIYODA CHO, HIMEJI, JAPAN
FX 2N -485-BD COMMUNICATION BOARD
USER'S MANUAL
JY992D66201A
(MEE 9706) Effective JUN. 1997 Specifications are subject
to change without notice.

FX 2N -485-BD COMMUNICATION BOARD

Foreword
•This manual containstext, diagrams and explanations which will guide the reader in thecorrect installation and operation
of the FX2N-485-BD COMMUNICATION BOARD. It should be read and understood before attempting to install or use the
unit.
Further information can be found in the FX PROGRAMMING MANUAL, FX2N series hardware manuals and manual of
FX-485PC-IF USER’S MANUAL.
•If in doubt at any stage during the installation of the FX2N-485-BD COMMUNICATION BOARD always consult a
professional electrical engineer who is qualified and trained to the local and national standards.
FX 2N -485-BD COMMUNICATION BOARD

Under no circumstances will MITSUBISHI ELECTRIC be liable responsible for any consequential damage that may arise
as a result of the installation or use of this equipment.
All examples and diagrams shown in this manual are intended only as an aid to understanding the text, not to guarantee
operation. MITSUBISHI ELECTRIC will accept no responsibility for actual use of the product based on these illustrative
examples.
Owing to the very great variety in possible application of this equipment, you must satisfy yourself as to its suitability for
your specific application.
FX 2N -485-BD COMMUNICATION BOARD

USER’S MANUAL
FX2N-485-BD COMMUNICATION BOARD
Manual number: JY992D66201
Manual revision: A
Date: JUNE 1997
FX 2N -485-BD COMMUNICATION BOARD
i

Guidelines for the safety of the user and protection of the FX2N-485-BD COMMUNICATION BOARD.
This manual provides information for the installation and use of the FX2N-485-BD COMMUNICATION BOARD. The manual
has been written to be used by trained and competent personnel. The definition of such a person or persons is as follows;
a) Any engineer who is responsible for the planning, design and construction of automatic equipment using the product
associated with this manual should be of a competent nature, (trained and qualified to the local and national standards
required to fulfill that role). These engineers should be fully aware of safety with regards to automated equipment.
b) Any commissioning or service engineer must be of a competent nature, trained and qualified to the local and national
standards required to fulfill that job. These engineers should also be trained in the use and maintenance of the
completed product. This includes being completely familiar with all associated documentation for the said product. All
maintenance should be carried out in accordance with established safety practices.
c) All operators of the compliance product should be trained to use that product in a safe and coordinated manner in
compliance to established safety practices. The operators should also be familiar with all documentation which is
connected with the actual operation of the completed equipment.
Note: The term ‘completed equipment’ refers to a third party constructed device which contains or uses the product
associated with this manual.
FX 2N -485-BD COMMUNICATION BOARD
ii

Note’s on the symbology used in this manual
At various times through out this manual certain symbols will be used to highlight points of information which are intended to
ensure the users personal safety and protect the integrity of the equipment. Whenever any of the following symbols are
encountered, its associated note must be read and understood. Each of the symbols used will now be listed with a brief
description of its meaning.
Hardware warnings
1) Indicates that the identified danger WILL cause physical and property damage.
2) Indicates that the identified danger POSSIBLY cause physical and property damage.
3) Indicates a point of further interest or further explanation.
Software warnings
4) Indicates special care must be taken when using this element of software.
5) Indicates a special point of which the user of the associate software element should be aware.
6) Indicates a point of interest or further explanation.
FX 2N -485-BD COMMUNICATION BOARD
iii

CONTENTS
1. INTRODUCTION ..................................... 1-1
1.1 External Dimensions .................................. 1-2
1.2 System Configuration .................................. 1-3
1.2.1 When Use No Protocol or Dedicated Protocol ..................... 1-3
1.2.2 When Use Parallel Link ................................ 1-3
1.2.3 When Use N:N Network ................................ 1-4
2. MOUNTING AND WIRING ................................ 2-1
2.1 Mounting Procedure ................................... 2-1
2.2 Cable and Terminal Resistor .............................. 2-2
2.2.1 Cable .......................................... 2-2
2.2.2 Selection of Wiring ................................... 2-3
2.2.3 Terminal Resistor ................................... 2-4
2.2.4 Two-pair Wiring .................................... 2-5
2.2.5 One-pair Wiring .................................... 2-6
3. SPECIFICATION ..................................... 3-1
3.1 General Specification .................................. 3-1
3.2 Power Supply Specification ............................... 3-1
3.3 Specification ....................................... 3-1
4. COMMUNICATION FORMAT ............................... 4-1
4.1 Related Flag and Data Registers ............................ 4-1
4.2 Communication Format D8120 ............................. 4-2
4.2.1 Example Program of Setting .............................. 4-4
FX 2N -485-BD COMMUNICATION BOARD
iv

5. RS EXAMPLE PROGRAM ................................5-1
5.1 Printer ..........................................5-1
5.1.1 System Configuration ..................................5-1
5.1.2 Communication Format .................................5-2
5.1.3 Example Program (1) ..................................5-3
5.2 Personal Computer ...................................5-4
5.2.1 System Configuration ..................................5-4
5.2.2 Communication Format .................................5-5
5.2.3 Example Program (2) ..................................5-6
6. PARALLEL LINK ......................................6-1
6.1 Parallel Link .......................................6-1
6.2 Outline ..........................................6-1
6.2.1 Normal Mode (Special auxiliary relay M8162: OFF) ..................6-2
6.2.2 High Speed Mode (Special auxiliary relay M8162: ON) ................6-2
6.3 Example Program (3) ..................................6-3
6.3.1 Normal Mode ......................................6-3
6.3.2 High Speed Mode ...................................6-4
7. N:N NETWORK ......................................7-1
7.1 Outline ..........................................7-1
7.2 Related Flags and Data Registers ............................7-2
7.2.1 Special Auxiliary Relays ................................7-2
7.2.2 Special Data Registers .................................7-3
7.3 Setting ..........................................7-4
FX 2N -485-BD COMMUNICATION BOARD
v

7.3.1 Setting the Station No. (D8176) ............................ 7-4
7.3.2 Setting the Total Number of Slave Stations (D8177) .................. 7-4
7.3.3 Setting the Refresh Range (D8178) .......................... 7-5
7.3.4 Setting retry count (D8178) .............................. 7-7
7.3.5 Setting comms time-out (D8179) ........................... 7-7
7.3.6 Program used for setting ................................ 7-8
7.4 Error Code ........................................ 7-9
7.5 Examples Program ................................... 7-10
7.5.1 System Configuration ................................. 7-10
7.5.2 Operations ....................................... 7-11
7.5.3 Example of Set Program ................................ 7-12
7.5.4 Example of Error Program ............................... 7-13
7.5.5 Example of Operation Program ............................ 7-14
8. DIAGNOSTICS ...................................... 8-1
8.1 Common Items ..................................... 8-1
8.2 Using the No Protocol .................................. 8-2
8.3 Using the Dedicated Protocol .............................. 8-3
8.4 Using the Parallel Link ................................. 8-4
8.5 Using the N:N network ................................. 8-5
FX 2N -485-BD COMMUNICATION BOARD
vi

1. INTRODUCTION
The communication board FX2N-485-BD for RS485 (hereinafter referred to as “485BD”) can be connected to the base unit of
the FX2N Series PC to be used for the following applications.
(1) Data transfer using the no protocol
Data communication with diversified RS232C units including personal computers, bar code readers and printers can
be performed via the RS485 (422) converter using the no protocol. In this application, data is sent or received using
the data registers specified by the RS instruction because the 485BD does not have a buffer memory. For the setting
and program examples, refer to Chapters 5 and 6. For the RS instruction, refer to the FX Programming Manual.
(2) Data transfer using the dedicated protocol
Data transfer with RS485 (422) units can be performed on the 1:N basis using the dedicated protocol. For the
contents of the dedicated protocol used in this application, refer to the FX-485PC-IF User’s Manual.
(3) Data transfer using the parallel link
Data transfer with an FX2N programmable controller can be performed on the 1:1 basis for 100 auxiliary relays and 10
data registers. For the setting and program examples, refer to Chapter 7.
(4) Data transfer using the N:N network
Data transfer with FX2N programmable controllers can be performed on the N:N basis. For the setting, the number of
transferred data and program examples, refer to Chapter 8.
1
FX 2N -485-BD COMMUNICATION BOARD INTRODUCTION
1-1

1.1 External Dimensions
Dimensions : mm (inches) Accessory : M3 self-tapping screws ×2,
Terminal resistor 330 Ω×2110Ω×1
➀Mounting holes (2- φ4.0(0.16"))
➁Connector for programmable controller
➂SD LED : Flashes at high speed during sending.
➃RD LED : Flashes at high speed during sending.
➄Terminals to connect RS485 unit
The top face of this terminal block is higher than the top face of the panel cover
of the programmable controller by approximately 7 mm.
39(1.54")
52(2.05")
35(1.38")
46
(1.81")
5
RDA
RDB
SDA
RDB
SG
RDA
RDB
SDA
SDB
SG
4
3
2
1
1
FX 2N -485-BD COMMUNICATION BOARD INTRODUCTION
1-2

1.2 System Configuration
1.2.1 When Use No Protocol or Dedicated Protocol
When use 485BD in the system, total extension distance 50m. (No use : max. 500m)
When use dedicated protocol, max. 16 stations including A series
programmable controller.
1.2.2 When Use Parallel Link
When use 485BD in the system, this distance 50m. (No use : max. 500m)
FX2N FX/FX2C/
FXON A series
485BD FX(ON)-485ADP A series
Porgrammable controller's
computer link unit
RS422/485 Unit A
C
P
U
485BD FX2N
FX2N+485BD or
FX2N+FX-CNV-BD
+FX0N-485ADP
1
FX 2N -485-BD COMMUNICATION BOARD INTRODUCTION
1-3

1.2.3 When Use N:N Network
Total extension distance 50m, max. 8 stations.
()
Master
FX2N
Slave Slave Slave
FX2N
485BD
485BD
FX2N
485BD
FX2N
485BD
1
FX 2N -485-BD COMMUNICATION BOARD INTRODUCTION
1-4

2. MOUNTING AND WIRING
2.1 Mounting Procedure
Turn off the power of the programmable controller, and mount the 485BD using the following procedure.
➀Remove the panel cover from the top face of the base unit.
➁Connect the connector for programmable controller provided on the 485BD to the board mounting connector
provided on the base unit.
➂Fix the 485BD to the base unit using the M3 self-tapping screws supplied.
Tightening torque: 0.3 to 0.6 Nm (3 to 6 kgf•cm)
➃Remove the cut out on the left of the panel cover using a tool such as nippers
or cutters so that the terminal block can. The top face of this terminal block is
higher than the top face of the panel cover of the programmable controller by
approximately 7 mm.
1
485BD
3
4
2
2
FX 2N -485-BD COMMUNICATION BOARD MOUNTING AND WIRING
2-1

2.2 Cable and Terminal Resistor
2.2.1 Cable
ToconnecttheRS485(422) unit,useashieldedtwist-paircable. ThecablemodelmustbetheAWG26to16,andthemaximum
tightening torque must be 0.6 Nm (6 kgf•cm). If a cable other than the AWG 26 to 16 is used, normal communication cannot
be assured because the terminal may be imperfectly contacted. It is recommended to insert a cable integratedby the crimping
tool into the terminal.
Total extension distance 50m (No use : max. 500m), max.8 stations.
Master
FX
2N
Slave Slave Slave
FX 2N
485BD
485BD
FX 2N
485BD
FX 2N
485BD
2
FX 2N -485-BD COMMUNICATION BOARD MOUNTING AND WIRING
2-2

2.2.2 Selection of Wiring
(1) When two-pair wiring is required.
1) When an RS422 unit is connected.
2) When N:N network no use.
3) When the dedicated protocol is used and high speed response is equired (when the transmission sentence
wait time is required to be 70 ms or less).
For the transmission sentence wait time, refer to the users manual of the FX-485PC-IF.
4) When the on-demand function of the dedicated protocol is used.
However, the RS485/422 unit must be connected to the 485BD on the one-to-one basis.
5) When wiring is added to the system which has been already constructed using two-pair wiring.
(2) When one-pair wiring is required.
1) When wiring is added to the system which has been already constructed using one-pair wiring.
2) When N:N network use.
3) When two-pair wiring is not necessary.
2
FX 2N -485-BD COMMUNICATION BOARD MOUNTING AND WIRING
2-3

2.2.3 Terminal Resistor
Provide the terminal resistor at the both ends of the line as described in Paragraphs 2-3 and 2-4.
1) In the case of two-pair wiring, connect the terminal resistor
(330 Ω, 1/4 W) between terminals SDA and SDB as well as between terminals
RDA and RDB. Use the resistors offered as accessories of the 485BD.
2) In the case of one-pair wiring, connect the terminal resistor
(110 Ω, 1/2 W) between termials RDA and RDB. Use the resistors offered as
accessories of the 485BD.
Orange Orange Brown
BrownBrown
Brown
2
FX 2N -485-BD COMMUNICATION BOARD MOUNTING AND WIRING
2-4

2.2.4 Two-pair Wiring
*1 R is the terminating resistance. Connect the terminating resistance (330 Ω) between terminals SDA and SDB,
and terminals RDA and RDB.
*2 Shield of connect the 485BD to shielded twist-pair cable must be connected to ground (100 Ωor less).
When use parallel link, ground both side. When use no protocol or dedicated protocol, ground one side.
*3 Connect terminal FG to each terminal of the programmable controller main body grounded with resistance of
100 Ωor less. However, as for the computer link unit of the A series programmable controller, see the
manual of the computer link unit.
*4 When use RS232/485 or RS232/422 adapter, please the adapter use FX-485PC-IF.
Grounding of resistance 100 or less
R*1
R*1
SDA
SDB
RDA
RDB
SDA
SDB
RDA
RDB
SG
SDA
SDB
RDA
RDB
LINK
SG
*3
FG
SDA
SDB
RDA
RDB
SG
*3
FG
R*1
R*1
RS485/422 unit 485BD FX (ON) -485ADP A series programmable
controller
' s computer link unit
SG
*2
2
FX 2N -485-BD COMMUNICATION BOARD MOUNTING AND WIRING
2-5