FX2N-2AD SPECIAL FUNCTION BLOCK
USER’S GUIDE
JY992D74701G
This manual contains text, diagrams and explanations which will guide the reader in the correct installation
and operation of the FX
2N
-2AD special function block and should be read and understood before
attempting to install or use the unit.
Further information can be found in the FX SERIES PROGRAMMING MANUAL(ΙΙ), FX
3U
FX
/FX
3UC
Programming Manual, FX0N/FX1N/FX2N/FX
2NC
/FX3G/FX
3GC
/FX3U/FX
3S
/FX3G/FX
3UC
3GC
SERIES
HARDWARE MANUAL of each PLC.
Compliance with EC directive (CE Marking)
This note does not guarantee that an entire mechanical module produced in accordance with the contents
of this note will comply with the following standards.
Compliance to EMC directive and LVD directive for the entire mechanical module should be checked by
the user/manufacturer. For more information please consult with your nearest Mitsubishi product provider.
Regarding the standards that comply with the main unit, please refer to either the FX series product
catalog or consult with your nearest Mitsubishi product provider.
Requirement for Compliance with EMC directive
The following products have shown compliance through direct testing (of the identified standards below)
and design analysis (through the creation of a technical construction file) to the European Directive for
Electromagnetic Compatibility (2014/30/EU) when used as directed by the appropriate documentation.
Attention
This product is designed for use in industrial applications.
Type: Programmable Controller (Open Type Equipment)
Models: MELSEC FX
from December 1st, 1998 FX
Standard Remark
EN61131-2: 2007
Programmable controllers
- Equipment requirements and tests
2N
series manufactured
2N
-2AD
Compliance with all relevant aspects of the standard.
EMI
• Radiated Emission
• Conducted Emission
EMS
• Radiated electromagnetic field
• Fast transient burst
• Electrostatic discharge
• High-energy surge
• Voltage drops and interruptions
• Conducted RF
• Power frequency magnetic field
/
Caution for EC Directive
The FX2N-2AD have been found to be compliant to the European standards in the aforesaid manual and
directive. However, for the very best performance from what are in fact delicate measuring and controlled
output device Mitsubishi Electric would like to make the following points;
As analog devices are sensitive by nature, their use should be considered carefully.
For users of proprietary cables (integral with sensors or actuators), these users should follow those
manufacturers installation requirements.
Mitsubishi Electric recommend that shielded cables should be used. If NO other EMC protection is provided,
then users may experience temporary loss or accuracy between ±10% in very heavy industrial areas.
However, Mitsubishi Electric suggest that if adequate EMC precautions are followed for the users
complete control system, users should expect accuracy as specified in this manual.
• Sensitive analog cable should not be laid in the same trunking or cable conduit as high voltage
cabling. Where possible users should run analog cables separately.
• Good cable shielding should be used. When terminating the shield at Earth - ensure that no earth
loops are accidentally created.
• When reading analog values, EMC accuracy can be improved out by averaging the readings. This
can be achieved either through functions on the through a users program in the main unit.
1. Introduction
The FX2N-2AD type analog input block (hereafter referred to as the FX2N-2AD) is used to convert the
analog input of two points (voltage and current input) into a digital value of 12 bits, and to forward the
values to the Programmable Controller (hereafter referred to as a PLC).
2N
-
FX
2AD can connected to the FX0N, FX1N, FX2N, FX
2NC
, FX3G, FX
3GC
, FX3U, and the FX
3UC
series
Programmable Controllers.
1) The analog input is selected from the voltage or current input by the method of connecting wires.
At this time, assume the setting to be two channels common analog input (voltage or current input).
2) The analog to digital conversion characteristics can be adjusted.
3) The block occupies 8 I/O points which can be allocated from either inputs or outputs.
4) The data transfer with the PLC uses the FROM/TO instructions.
3U
FX
3UC
/FX
series PLC can use direct specification of buffer memory.
2. External Dimensions and Parts
Dimensions: mm (inches)
Mass (Weight): Approx. 0.2kg (0.44lbs)
Accessories: Special Function block number label
3. Wiring
Voltage input 0~10V DC
Current input 4~20mA
PLC
*1 The FX2N-2AD cannot have 1 channel as an analog voltage input and one channel as current input because both
channels use the same offset and gain values. For current input please short circuit VIN and IIN as shown in the
diagram.
*2 Connect a 0.1 to 0.47µF 25V DC capacitor with the position of *2 when there is voltage ripple in the voltage input or
there will be a lot of noise.
VIN
IIN
*2
COM
VIN
IIN
*1
COM
Extension cable
{
Ω
250
{
{
{
{
{
37.3K
AG
37.3K
Ω
250
FX2N-2AD
Ω
165K
Ω
165K
Ω
Ω
Channel number enter
{
4. Connection with Programmable controller
1) The FX2N-2AD and main unit are connected by a cable on the right of the main unit.
2N
2) Up to 4 FX
3GC
FX
-2AD units can connect to the FX0N series PLC, up to 5 for FX
/FX3U/FX
3UC
or, up to 4 for the FX
2NC
series PLC, all with powered extension units.
However the following limitation exists when the undermentioned special function blocks are connected.
FX2N: Main unit and powered extension units of 32 points I/O or less. Consumption current available for
undermentioned special function blocks ≤ 190mA
2N
FX
: Main unit and powered extension units of I/O 48 points or more. Consumption current available
for undermentioned special function blocks ≤ 300mA
2NC
FX
: Up to 4 undermentioned special function blocks can be connected regardless of the system I/O.
0N/1N
FX
: Main unit and powered extension units. Up to 2 undermentioned special function blocks can be
connected regardless of the system I/O.
FX2N-2AD FX2N-2DA FX0N-3A
Consumption current of 24V DC for one unit 50mA 85mA 90mA
The consumption current of the above units is to be subtracted from the service power supply of the
host PLC.
3) The blocks occupies 8 points. (The 8 points can be allocated from either inputs or outputs).
2N
4) FX
-2AD consumes 5V DC by 20mA.
The total 5V consumption of all special function blocks connected to a main unit or an extension unit
must not exceed the 5V source capacity of the system.
1N,
up to 8 for FX2N/FX3G/
5. Specifications
5.1 General specification
Item Content
Dielectric withstand
voltage
General specifications other than the above-mentioned are the same as the main unit of the
Programmable controller. (Refer to the Hardware manual of the Programmable controller)
5.2 Power supply specification and others
Item Content
Analog circuits
Digital circuits 5V DC 20mA (Internal power supplied from the main unit)
Isolation
Number of occupied
I/O points
5.3 Defining gain and offset
Item Voltage input Current input
Range of analog input
Digital output 12bit
Resolution
Integrated accuracy
Processing time 2.5ms/1 channel (synchronized to the sequence program)
500V AC 1min (Between all terminals and case)
24V DC
Photo-coupler isolation between analog and digital circuits.
No isolation between analog channels.
The blocks occupies either 8 input or output points
(can be either inputs or outputs)
At shipping, the unit is adjusted to a digital range of 0 to 4000 for an analog
voltage input of 0 to 10V DC. When using an FX
differing voltage inputs except 0 to 10V DC, it is necessary to adjust the
offset and gain.
0 to 10V DC, 0 to 5V DC
(input resistance 200KΩ)
Warning-this unit may be damaged
by an input voltage in excess of
-0.5V, +15V DC
2.5mV:10V/4000(At shipment)
Change depending on the input
characteristic.
±
0.1V
10% 50mA (Internal power supplied from the main unit)
±
2N
-2AD for current or
4 to 20mA (input resistance 250Ω)
Warning-this unit may be damaged by
an input current in excess of
-2mA, +60mA
4µA: (20-4)A/4000
Change depending on the input
characteristic.
±
0.16mA
Analog value :0 to 10V
Digital value :0 to 4000
(At shipment)
4000
4095
Analog value :0 to 20mA
Digital value :0 to 4000
4000
4095
Input characteristics
10.238V
Digital value
010V
Analog value
The input characteristic is the same for each channel.
Digital value
020mA
4mA
Analog value
20.380mA
6. Allocation of buffer memory (BFM)
6.1 Buffer memory
BFM
number
#0 Reserved Current value of input data (lower 8bit data)
#1 Reserved Current value of input data (higher 4bit data)
#2 to 16 Reserved
#17 Reserved
#18 or
more
BFM#0 :The current value of the input data for the channel specified with BFM#17 (lower 8bit data) is
BFM#1:The current value of the input data (higher 4bit data) is stored. The current value data is stored
by binary.
BFM#17:b0
Write/read data to the above-mentioned buffer memory according to the programming example of
"8.Program example".
b15 to b8 b7 to b4 b3 b2 b1 b0
Analog to digital
conversion beginning
Reserved
stored. The current value data is stored by binary.
⋅⋅⋅
Channel (CH1,CH2) which does the analog to digital conversion is specified
⋅⋅⋅
b0=0
CH1
⋅⋅⋅
b0=1
b1⋅⋅⋅0→1
CH2
The A/D conversion process is started.
Analog to digital
conversion channel
.
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