Mitsubishi Electric FX2N-8AD User manual

USER’S MANUAL
FX2N-8AD Analog input block
Industrial automation
Elincom Group
EuropeanUnion:www.elinco.eu
Russia: www.elinc.ru

FX2N-8AD Analog input block
Foreword
• This manual contains text, diagrams and explanations which will guide the reader in the correct installation
and operation of the FX2N-8AD Analog input block. It should be read and understood before attempting to
install or use the unit.
• Further information can be found in the FX0N/FX1N/FX2N/FX2NC/FX3U/FX3UC Series Hardware Manual for
connecting main unit, and the FX Series Programming Manual(ΙΙ).
• If in doubt at any stage of the installation of FX2N-8AD Analog input 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-8AD Analog input block please consult the nearest Mitsubishi
Electric distributor.
• This manual is subject to change without notice.

FX2N-8AD Analog input block
USER’S MANUAL
This manual confers no industrial property rights or any rights of any other kind, nor does it confer any patent licenses.
Mitsubishi Electric Corporation cannot be held responsible for any problems involving industrial property rights which may
occur as a result of using the contents noted in this manual.
FX2N-8AD Analog input block
Manual number :JY992D86001
Manual revision :F
Date :September 2008

FX2N-8AD Analog input block
ii

FX2N-8AD Analog input block
iii
Guidelines for the Safety of the User and Protection of the FX2N-8AD Analog
input block.
This manual provides information for the use of the FX2N-8AD Analog input 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.

FX2N-8AD Analog input block
iv
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.
Hardware Warnings
1) Indicates that the identified danger WILL cause physical and property damage.
2) Indicates that the identified danger could 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 which the user of the associate software element should
be aware.
6) Indicates a point of interest or further explanation.

FX2N-8AD Analog input block
v
• 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-8AD Analog input block
vi

FX2N-8AD Analog input block Contents.
vii
Guideline............................................................................................................................iii
1. Introduction .........................................................................................1-1
2. External Dimensions...........................................................................2-1
3. Part Name...........................................................................................3-1
4. Installation...........................................................................................4-1
5. Connection to PLC..............................................................................5-1
6. Wiring..................................................................................................6-1
6.1 Caution.............................................................................................................6-1
7. Specifications......................................................................................7-1
8. Buffer Memory (BFM).........................................................................8-1
8.1 Buffer Memories (BFM) lists ............................................................................8-3
8.2 Details of buffer memories.............................................................................8-13
8.2.1 BFM #0, #1: Specifies input mode. ...................................................................8-13
8.2.2 BFM #2 to BFM #9: Number of times of averaging...........................................8-15
8.2.3 BFM #10 to BFM #17: Channel data.................................................................8-17
8.2.4 BMF #19: Disables setting change....................................................................8-17
8.2.5 BFM #20: Initializes functions............................................................................8-17
8.2.6 BFM #21: Writes I/O characteristics..................................................................8-18
8.2.7 BFM #22: Sets convenient functions.................................................................8-19
8.2.8 BFM #24: Specifies high-speed conversion channel ........................................8-20
8.2.9 BFM #26: Upper/lower limit value error status..................................................8-21
8.2.10 BFM #27: A/D data sudden change detection status........................................8-22
8.2.11 BFM #28: Scale over status..............................................................................8-23
8.2.12 BFM #29: Error status.......................................................................................8-25
8.2.13 BFM #30: Model code.......................................................................................8-26

FX2N-8AD Analog input block Contents.
viii
8.2.14 BFM #32: Operating time..................................................................................8-26
8.2.15 BFM#33 disconnection detection (Only goods: since V1.10)............................8-27
8.2.16 BFM #41 to BFM #48: Offset data
BFM #51 to BFM #58: Gain data.......................................................................8-28
8.2.17 BFM #61 to BFM #68: Addition data.................................................................8-30
8.2.18 BFM #71 to BFM #78: Lower limit, error set value
BFM #81 to BFM #88: Upper limit, error set value............................................8-31
8.2.19 BFM #91 to BFM #98: Sudden change detection set value..............................8-33
8.2.20 BFM #99: Clears upper/lower limit value error and sudden change
detection error...................................................................................................8-35
8.2.21 BFM #101 to BFM #108: Peak value (minimum value)
BFM #111 to BFM #118: Peak value (maximum value)....................................8-36
8.2.22 BFM #109: Peak value reset flag (minimum value)
BFM #119: Peak value reset flag (maximum value)..........................................8-37
8.2.23 BFM #198: Data history sampling time .............................................................8-38
8.2.24 BFM #199: Resets or stops data history...........................................................8-40
8.2.25 BFM #200 to BFM #3399: Data history.............................................................8-41
9. Adjustment of I/O Characteristics........................................................9-1
9.1 Standard I/O characteristics.............................................................................9-2
9.2 Adjustment of I/O characteristics.....................................................................9-7
10. Example program..............................................................................10-1
Appendix A
Associated Manuals List...........................................................................A-1

Introduction 1
1-1
1. Introduction
The FX2N-8AD analog input block (hereafter referred to as "FX2N-8AD") converts 8 points of
analog input values (voltage input, current input and temperature input) into digital values, and
transfers them to the PLC main unit.
The FX2N-8AD can be connected to FX0N/FX1N/FX2N/FX2NC/FX3U/FX3UC Series PLC.
1) Analog inputs can be selected from the voltage input, the current input and the thermocouple
input (temperature input) by the input mode setting by the TO instruction given by the PLC
main unit and the connection method.
At this time, a different analog input can be selected for each channel.
2) The voltage input can be selected within the range from -10 to +10 V. The current input can
be selected within the range from -20 to +20 mA and from +4 to +20 mA. The input
characteristics can be adjusted for each channel (except while the analog value direct
display is used).
The thermocouple input can be selected among the K type, J type and T type. (The input
characteristics cannot be adjusted when the thermocouple input is used.)
3) The resolution is 0.63 mV (20 V ×1/32,000) or 2.50 mV (20 V ×1/8,000) when the voltage
input is used, 2.50 µA (40 mA ×1/16,000) or 5.00 µA (40 mA ×1/8,000) when the current
input is used, and 0.1 °C when the thermocouple input is used.
FX2N-8AD Analog input block

FX2N-8AD Analog input block Introduction 1
1-2
4) Up to two FX2N-8AD units can be connected to FX0N main unit, FX0N extension unit, FX1N
main unit.
Up to eight FX2N-8AD units can be connected to the FX2N/FX3U/FX3UC*1 Series PLC.
Up to four FX2N-8AD units can be connected to the FX2NC Series PLC.
(For connection to the FX2NC Series PLC, FX2NC-CNV-IF is required.)
(For connection to the FX3UC Series PLC, FX3UC-1PS-5V or FX2NC-CNV-IF is required.)
Data transfer with the PLC is performed to buffer memories of the FX2N-8AD by FROM/TO
instructions.
*1 Up to seven FX2N-8AD units can be connected to the FX3UC-32MT-LT PLC.

External Dimensions 2
2-1
2. External Dimensions
Figure 2.1: External Dimensions
COM2
I8+
I4+
V3+ I3+ COM3COM1
COM5
COM8
I5+
24+ 24-
POWER
24V
V2+ I2+ V4+
V7+
V1+ I1+
COM4
V5+
V6+
I7+
I6+ COM6
COM7
V8+
7.5(0.30)
7.5(0.30)
105(4.13)
8(0.31)
75(2.95)
90(3.54)
67(2.64)
(installation dimension) 75(2.95)
8(0.31)
FX2N-8AD
98(3.86)
(installation dimension)
Dimensions: mm(inch)
Mass(Weight): 0.3 kg(0.66 lbs)
FX2N-8AD Analog input block

FX2N-8AD Analog input block External Dimensions 2
2-2
MEMO

Part Name 3
3-1
3. Part Name
• For wiring, refer to Section 6.
• Never perform wiring to terminals.
Table 3.1: Status indicator LED
Indication Description
POWER Lit while 5 V power is normally
supplied from PLC.
24 V Lit while 24 V power is normally
supplied to “24+” and “24-”
terminals of FX2N-8AD.V
V1+ I1+
COM1
V3+ I3+
24+ 24- V2+ I2+ V4+ I4+
COM4
COM3
COM2
I6+
COM5
V7+ I7+
V6+
V5+ I5+ V8+ I8+
COM8
COM7
COM6
V8+
COM7
COM6
I6+
I7+
V6+
V5+
COM4
I1+V1+
V7+
V4+
I2+V2+
24V
POWER
24-24+
I5+
COM8
COM5
COM1 COM3
I3+V3+
I4+
I8+
COM2
FX
2N
-8AD
Installation hole (screw M4) Status indicator LED
M3.5
(terminal screw)
Hook for DIN rail
Extension
cable
Extension
connector
Terminal arrangement
Figure 3.1: Part name
•
FX2N-8AD Analog input block

FX2N-8AD Analog input block Part Name 3
3-2
MEMO

Installation 4
4-1
4. Installation
Install the FX2N-8AD to the right side of a main unit, extension unit, extension block or special
block of the FX0N/FX1N/FX2N/FX2NC/FX3U/FX3UC Series PLC.
The FX2N-8AD can be installed with a DIN rail (DIN46277 of 35 mm in width) or directly
installed with screws M4. For the details, refer to the handy manual supplied together with the
PLC main unit.)
FX2N-8AD Analog input block

FX2N-8AD Analog input block Installation 4
4-2
Figure 4.1: Installation with DIN rail
•TheFX
2N-8AD can be installed on a DIN rail
(DIN46277) of 35 mm in width as it is. For
removal, pull down on the DIN rail mounting
hook, then remove the FX2N-8AD.
Figure 4.2: Direct installation
•TheFX
2N-8AD can be installed directly by
inserting screws (M4) into installation holes.
For the pitch and the position of installation
holes, refer to the figure on the left.
V8+
COM7
COM6
I6+
I7+
V6+
V5+
COM4
I1+V1+
V7+
V4+
I2+
V2+
24V
POWER
24-
24+
I5+
COM8
COM5
COM1 COM3
I3+
V3+
I4+
I8+
COM2
FX2N-8AD
Hook for DIN rail
Installation
screw M4
67(2.64)
98(3.86)
Dimensions: mm(inch)

Connection to PLC 5
5-1
5. Connection to PLC
Connect the FX2N-8AD to the right side of a main unit, extension unit or extension block of
FX0N/FX1N/FX2N/FX2NC/FX3U/FX3UC Series PLC with an extension cable.
For connection to a main unit or extension block of the FX2NC Series PLC, FX2NC-CNV-IF is
required.
For connection to a main unit or extension block of the FX3UC Series PLC, FX3UC-1PS-5V or
FX2NC-CNV-IF is required.
Please check power supply availability to determine the number of FX2N-8AD blocks that can
be connected to the FX0N/FX1N/FX2N/FX2NC/FX3U/FX3UC PLCs.
A unit No. 0 to 7 is automatically assigned to each special unit or special block connected to a
PLC main unit from the one nearest to the main unit.*1
The data is read from and written to the FX2N-8AD by FROM/TO instructions given by the main
unit.
*1 Because the unit No.0 is assigned to the built-in CC-Link/LT master in the FX3UC-32MT-LT,
unit numbers assigned to special extension units/blocks begins with No.1.
FX2N-8AD Analog input block

FX2N-8AD Analog input block Connection to PLC 5
5-2
MEMO