Mitsubishi FX2N-16LNK-M User manual

USER’S MANUAL
FX2N-16LNK-M MELSEC-I/O LINK
REMOTE I/O SYSTEM MASTER BLOCK

FX2N-16LNK-M MELSEC-I/O LINK REMOTE I/O SYSTEM MASTER BLOCK
Foreword
• This manual contains text, diagrams and explanations which will guide the reader in the correct installation
and operation of the FX2N-16LNK-M MELSEC-I/O LINK REMOTE I/O SYSTEM MASTER BLOCK. It
should be read and understood before attempting to install or use the unit.
• Further information can be found in the FX PROGRAMMING MANUAL(ΙΙ), FX0N/FX1N/FX2N/FX2NC series
hardware manuals.
• If in doubt at any stage of the installation of FX2N-16LNK-M MELSEC-I/O LINK REMOTE I/O SYSTEM
MASTER BLOCK always consult a professional electrical engineer who is qualified and trained to the local
and national standards that applies to the installation site.
• If in doubt about the operation or use of FX2N-16LNK-M MELSEC-I/O LINK REMOTE I/O SYSTEM
MASTER BLOCK please consult the nearest Mitsubishi Electric distributor.
• This manual is subject to change without notice.

FX2N-16LNK-M MELSEC-I/O LINK REMOTE I/O SYSTEM MASTER BLOCK
i
FX2N-16LNK-M MELSEC-I/O LINK REMOTE I/O SYSTEM MASTER BLOCK
USER’S MANUAL Manual number : JY992D73701
Manual revision : D
Date : October 2004

FX2N-16LNK-M MELSEC-I/O LINK REMOTE I/O SYSTEM MASTER BLOCK
ii
Guidelines for the safety of the user and protection of the FX2N-16LNK-M MELSEC-I/O LINK SYSTEM
MASTER BLOCK
This manual provides information for the installation and use of the FX2N-16LNK-M MELSEC-I/O LINK
SYSTEM MASTER BLOCK. 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
all aspects 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 said product. All maintenance should be carried out in accordance with
established safety practices.
c) All operators of the completed equipment (see Note) should be trained to use this product in a safe
manner in compliance to established safety practices. The operators should also be familiar with
documentation which is associated 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.
Notes on the Symbols Used in this Manual
At various times throughout this manual certain symbols will be used to highlight points which are intended to
ensure the users personal safety and protect the integrity of 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.

FX2N-16LNK-M MELSEC-I/O LINK REMOTE I/O SYSTEM MASTER BLOCK
iii
Hardware warnings
Software 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.
1 ) Indicates special care must be taken when using this element of software.
2 ) Indicates a special point of which the user of the associate software element should be aware.
3 ) Indicates a point of interest or further explanation.

FX2N-16LNK-M MELSEC-I/O LINK REMOTE I/O SYSTEM MASTER BLOCK
iv
• 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.
• Please contact a Mitsubishi Electric distributor for more information concerning applications in life
critical situations or high reliability.

FX2N-16LNK-M MELSEC-I/O LINK REMOTE I/O SYSTEM MASTER BLOCK Contents
v
CONTENTS
1. Notes to User .............................................................................................1-1
1.1 Outline of product ...................................................................................................... 1-1
1.2 Manual configuration and diversified data ................................................................. 1-2
2. Product Specifications ...............................................................................2-1
2.1 System configuration ................................................................................................. 2-1
2.2 Appearance and name of each portion .....................................................................2-3
2.3 General specifications and performance specifications ............................................ 2-4
3. Connection and Wiring ..............................................................................3-1
3.1 Cautions on connection ............................................................................................. 3-1
3.2 Connection method ................................................................................................... 3-7
4. Operation ...................................................................................................4-1
4.1 Operating procedure .................................................................................................. 4-1
4.2 Setting and function of each portion .......................................................................... 4-2
4.3 Setting of station No. .................................................................................................4-7
4.4 Program ..................................................................................................................... 4-8
5. Troubleshooting .........................................................................................5-1
6. Remote I/O Unit .........................................................................................6-1
6.1 Model name structure ................................................................................................6-1
6.2 Outside dimensions ................................................................................................... 6-2
Appendix ...................................................................................................... A-1

FX2N-16LNK-M MELSEC-I/O LINK REMOTE I/O SYSTEM MASTER BLOCK Contents
vi
MEMO

FX2N-16LNK-M MELSEC-I/O LINK REMOTE I/O SYSTEM MASTER BLOCK Notes to user 1
1-1
1. Notes to User
1.1 Outline of product
The MELSEC-I/O LINK REMOTE I/O SYSTEM MASTER BLOCK FX2N-16LNK-M (hereinafter referred to as
"master block") is connected to an FX0N/FX1N/FX2N/FX2NC Series programmable controller (PC), and realizes
a remote I/O system which saves wiring and enables easy programming for communication with remote I/O
units.
Applicable PC
The master block can be connected as a special block of an FX0N/FX1N/FX2N/FX2NC Series PC.
When it is connected to an FX2NC Series PC, a connector conversion interface FX2NC-CNV-IF is required.
Features
1 ) Many control points
One master block can control up to 128 points (64 input points and 64 output points) (when mixed I/O
type remote I/O units having 8 or 16 control points are used).
To one master block, up to 16 remote I/O units can be connected.
2 ) Wiring saving
A master block and a remote I/O unit can be easily connected with a twisted-pair or cabtyre cable.
3 ) Total extension distance: 200 m
The distance can be extended up to 200 m in the entire system.
Terminal resistors are not required, and connection using T branches can be realized.
4 ) Free from system down caused by failure in one station
Even if failure has occurred in a remote station in the system, the system does not come down.
Diversified error indication LEDs facilitate quick troubleshooting.
5 ) Easy programming
Element Nos. for inputs (X) and outputs (Y) are assigned to remote I/O units in the same way as general
I/Os.
Communication programs are not required.

FX2N-16LNK-M MELSEC-I/O LINK REMOTE I/O SYSTEM MASTER BLOCK Notes to user 1
1-2
1.2 Manual configuration and diversified data
This user manual exclusively is packed together with the master block.
For programs in a basic PC unit, handling of remote I/O units, etc., refer to the corresponding data.
User manual (this manual)
This manual describes cautions on safety, specifications, attachment and wiring of the master block, program-
ming and troubleshooting.
User manual of MELSEC-I/O LINK REMOTE I/O SYSTEM MASTER UNIT AJ51T64/A1SJ51T64
(detailed volume)
This manual describes the specifications of remote I/O units connected to the master block.

FX2N-16LNK-M MELSEC-I/O LINK REMOTE I/O SYSTEM MASTER BLOCK Product Specifications 2
2-1
2. Product Specifications
2.1 System configuration
Example of system configuration
• Basic unit
FX0N/FX1N/FX2N/FX2NC
Series
*2
The number of I/O points include a basic unit, extension
units/blocks, special extension units/blocks and remote
I/O units.
FX2NC-CNV-IF is
required when FX2NC
is connected.
• I/O link master block FX2N-16LNK-M
*1:Extension unit, extension block, special extension unit or
special extension block
*2 Remote I/O unit
128 points (16 stations) maximum
Total extension distance: 200 m
128 points (16 stations) maximum
Total extension distance: 200 m
*1
*2
*2
*2
*2
*2*2
*2
*2*2
*1*1
Number of maximum I/O points: FX0N 128 points
FX1N 128 points
FX2N 256 points
FX2NC 256 points

FX2N-16LNK-M MELSEC-I/O LINK REMOTE I/O SYSTEM MASTER BLOCK Product Specifications 2
2-2
Number of connected master blocks
The number of connected master blocks can be arbitrary as far as the total number of I/O points of a basic
unit, master blocks, extension units/blocks and special extension units/blocks (occupying eight input or output
points) satisfies the following.
FX0N or FX1N :128 points ≥I/O points of basic unit + I/O points of extension units/blocks +
(I/O points of special extension units/blocks x 8) + I/O points occupied by master blocks
FX2N or FX2NC :256 points ≥Same above
However, one master block consumes 200 mA of 5 VDC power supply (which corresponds to 64 I/O points in
the case of FX2NC). When determining the number of master blocks connected to a basic unit and extension
units, refer to the handy manual of the basic unit.

FX2N-16LNK-M MELSEC-I/O LINK REMOTE I/O SYSTEM MASTER BLOCK Product Specifications 2
2-3
2.2 Appearance and name of each portion
yFace painting color: Munsell 0.08GY/7.64/0.81 yWeight: 0.5 kg
POWER
PARITY
SHORT
OPEN
24V
SD
RD
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
ERR
ERROR STATION
24-
24+
DG
DATA R NA
R NB
ON
OFF
ON
ON
OFF
OFF
POWER
PARITY
SHORT
OPEN
R N
SD
RD
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
ERR
ERROR STATION
3
2
10
765
4
3210
89ABCDEF
R N
43
4
90
87
Data/R N terminal
On-line station
setting switch
Terminal screw M3
POWER LED
Error
indication LED
I/O point
occupation
setting switch
24V
External 24 VDC
ground terminal
Next step extension
connector
For detailed operations and setting
of each portion, refer to Section 4.
Front face when top
cover is attached
Inside of top coverSide

FX2N-16LNK-M MELSEC-I/O LINK REMOTE I/O SYSTEM MASTER BLOCK Product Specifications 2
2-4
2.3 General specifications and performance specifications
General specifications
* 0.5 G when DIN rails are used for attachment
Specifications item Description
Ambient
temperature
During operation 0 to 55°C (32 to 131°F)
During storage -20 to 70°C (-4 to 158°F)
Ambient
humidity During operation 35 to 85%RH (no condensation)
Vibration resistance - Direct
mounting
EN68-2-6 :10 - 57 Hz, 0.075mm Half Amplitude.
57-150Hz : 9.8m/s2Acceleration
10 times in X, Y, Z (80mins/axis)
Vibration resistance - Din rail
mounting
EN68-2-6 : 10 - 57 Hz, 0.035mm Half Amplitude.
57-150Hz : 4.9m/s2Acceleration
10 times in X, Y, Z (80mins/axis)
Shock resistance EN68-2-27: 11ms, 147m/s2Acceleration
3 times in 3 directions
Noise resistance By noise simulator whose noise voltage is 1,000 Vp-p, noise width is 1µs
and frequency is 30 to 100 Hz
Withstand voltage 1,500 VAC, 1 min Between all terminals as a whole
and ground terminal
Insulation resistance 5 MΩor more by 500 VDC megger
Grounding Grouding resistance 100Ωor less (Common grounding with a strong
electrical system is not allowed.)
Ambient atmosphere Free from corrosive gas, flammable gas and much conductive dusts

FX2N-16LNK-M MELSEC-I/O LINK REMOTE I/O SYSTEM MASTER BLOCK Product Specifications 2
2-5
Performance specifications
Specifications item Description
Maximum number of con-
trolled I/O points 128 points (16 remote units with 4 points each) per master block
I/O refresh time Approx. 5.4 ms (without regard to number of I/O points)
Communication speed 38400 bps
Communication method Register insertion method
Synchronization method Frame synchronization and bit synchronization used together
Communication specifications
Error control method Adjacent phase inversion check and parity check used together (retry by
timeout)
Transmission path
type
Bus (multi-drop) type (T branches are available. Terminal resistors are not
required.)
Transmission distance Maximum total extension distance: 200 m
Maximum number of
connected units 16 stations per master block
Error (RUN) indication/out-
put
Indication by LEDs
Confirmation of 24V DC power supplied from outside to master block by
M8009 (24V DC down) in basic unit
External outputs by RUNA and RUNB
Number of occupied I/O
points Selectable among 16, 32, 48, 64, 96 and 128
Supply voltage from outside 21.6 to 27.6V DC (for communication path)
Current consumption of
power supply from outside 90 mA (TYP 24V DC)
Current consumption inside
(5 VDC) 200 mA
Weight 0.5 kg

FX2N-16LNK-M MELSEC-I/O LINK REMOTE I/O SYSTEM MASTER BLOCK Product Specifications 2
2-6
Cable specifications
* Cabtyre cables are weaker against noises than shielded cables.
Specifications item Description
Cable type Shielded twisted-pair cable Cabtyre cable *
Logarithm 0.75 mm2×1P 0.75 mm2×2C
Conductive resistance (20°
°°
°C) 29 Ω/km or less
Electrostatic capacity (1 kHz) 75 nF/km or less 
Characteristic impedance
(100 kHz) 100 Ω(average) 
Insulation resistance 500MΩ/km or more
Withstand voltage 500V AC for 1 min or more
Outer diameter ∅8.5 mm or less ∅9 mm or less

FX2N-16LNK-M MELSEC-I/O LINK REMOTE I/O SYSTEM MASTER BLOCK Product Specifications 2
2-7
• Recommended cables
The table below shows the model names, the specifications and the manufacturer of recommended cables.
Recommended cables
Item Specifications
Model name KNPEV-SB 0.75SQ×1P KNEV 0.75SQ×2C
Cable type Shielded twisted-pair cable Unshielded cabtyre cable
Logarithm 0.75 mm2×1P 0.75 mm2×2C
Conductor resistance (20°
°°
°C) 26.3 Ω/km or less
Electrostatic capacity (1 kHz) 60 nF/km or less 
Specific impedance
(1,000 kHz) 90 Ω(average) 
Insulation resistance 10,000 MΩor more
Withstand voltage 1000V AC
Cross section
Outer diameter ∅7.5 mm or less ∅7 mm or less
Braided shield Vinyl sheath
A pair of insulating conductors
0.75 mm
2
PE
Yellow
White
Vinyl sheath
Two cores of insulating
conductors 0.75 mm
2
PE
Yellow
White

FX2N-16LNK-M MELSEC-I/O LINK REMOTE I/O SYSTEM MASTER BLOCK Product Specifications 2
2-8
Model name Type
SPEV(SB)-0.75-1P Shielded twisted-pair cable (1 P)
KMPEV-SB CWS-178 0.75SQ×1P Shielded twisted-pair cable (1 P)
2PNCT 0.75SQ×2C Two-cored cabtyre cable
DPEV SB 0.75×1P Shielded twisted-pair cable (1 P)
VCT 0.75×2C Two-cored cabtyre cable
D-KPEV-SB 0.75×1P Shielded twisted-pair cable (1 P)
IPEV-SB 1P×0.75 Shielded twisted-pair cable (1 P)

FX2N-16LNK-M MELSEC-I/O LINK REMOTE I/O SYSTEM MASTER BLOCK Connection and Wiring 3
3-1
3. Connection and Wiring
3.1 Cautions on connection
Cautions on design
• Construct interlock circuits on a sequence program so that the system operates conservatively
when a communication error has occurred in a data link.
If the system does not operate conservatively, an accident may be caused by erroneous outputs
and/or malfunction.
• Never bind control cables and communication cables together with power cables. Never locate
control cables and communication cables near major circuits. Keep the distance of 100 mm or
more.
If sufficient distance is not kept, malfunction may be caused by noises.

FX2N-16LNK-M MELSEC-I/O LINK REMOTE I/O SYSTEM MASTER BLOCK Connection and Wiring 3
3-2
Cautions on system configuration
Pay attention to the following points in the power supply wiring (system design) so that erroneous inputs to or
outputs from remote I/O units can be prevented.
1 ) Countermeasures against erroneous inputs or outputs occurred when the power is turned on or off
• When the power is turned on
[Draft 1]Turn on at first the power of remote I/O units and the power of master blocks supplied from the
outside. Then, turn on the power of a basic PC unit.
[Draft 2]Turn on at the same time the power of remote I/O units, the power of master blocks supplied
from the outside and the power of a basic PC unit.
• When the power is turned off
[Draft 1]Turn off at first the power of a basic PC unit. Then, turn off the power of remote I/O units and the
power of master blocks supplied from the outside.
[Draft 2]Turn off at the same time the power of a basic PC unit , the power of remote I/O units and the
power of master blocks supplied from the outside.
2 ) Countermeasures against erroneous inputs occurred when the power of a remote I/O unit is instanta-
neously interrupted
If the power of a remote I/O unit is instantaneously interrupted, erroneous inputs may occur.
• Causes of erroneous inputs by instantaneous power interruption
The hardware of a remote I/O unit converts the I/O unit power supply (24V DC) into 5V DC inside, then
uses it.
If the power of a remote I/O unit is instantaneously interrupted, the following relationship is generated.
(Time until 5V DC inside remote I/O unit is turned off) >(Response time of input unit ON →OFF)
Accordingly, if I/O refresh occurs within the time shown as ➀in the figure below, erroneous inputs occur.