Mitsubishi Electric FX2N-2AD User Manual page 7

FX -2AD SPECIAL FUNCTION BLOCK
2N
USER'S GUIDE
This manual contains text, diagrams and explanations which will guide the reader in the correct installation
and operation of the FX -2AD special function block and should be read and understood before
2N
attempting to install or use the unit.
Further information can be found in the FX SERIES PROGRAMMING MANUAL(ΙΙ), FX
FX /FX Programming Manual, FX /FX /FX /FX
3U 3UC 0N 1N 2N
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 series manufactured
2N
from December 1st, 1998 FX -2AD
2N
Standard
EN61131-2: 2007 Compliance with all relevant aspects of the standard.
Programmable controllers EMI
- Equipment requirements and tests • 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 FX -2AD have been found to be compliant to the European standards in the aforesaid manual and
2N
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 FX -2AD type analog input block (hereafter referred to as the FX
2N
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).
FX 2AD can connected to the FX
2N
-
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.
FX /FX
3U 3UC
2. External Dimensions and Parts
JY992D74701G
/FX /FX /
3S 3G 3GC
/FX /FX /FX /FX SERIES
2NC 3G 3GC 3U 3UC
3. Wiring
Voltage input 0~10V DC
Current input 4~20mA
Remark
*1 The FX -2AD cannot have 1 channel as an analog voltage input and one channel as current input because both
2N
channels use the same offset and gain values. For current input please short circuit VIN and IIN as shown in the
diagram.
Connect a 0.1 to 0.47 µF 25V DC capacitor with the position of *2 when there is voltage ripple in the voltage input or
*2
there will be a lot of noise.
4. Connection with Programmable controller
1) The FX -2AD and main unit are connected by a cable on the right of the main unit.
2N
2) Up to 4 FX
FX /FX
3GC 3U
However the following limitation exists when the undermentioned special function blocks are connected.
FX : Main unit and powered extension units of 32 points I/O or less. Consumption current available for
2N
undermentioned special function blocks ≤ 190mA
FX : Main unit and powered extension units of I/O 48 points or more. Consumption current available
2N
for undermentioned special function blocks ≤ 300mA
FX : Up to 4 undermentioned special function blocks can be connected regardless of the system I/O.
2NC
FX : Main unit and powered extension units. Up to 2 undermentioned special function blocks can be
0N/1N
connected regardless of the system I/O.
Consumption current of 24V DC for one unit
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).
4) FX -2AD consumes 5V DC by 20mA.
2N
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.
-2AD) is used to convert the
2N
, FX , FX , FX , FX , FX , FX
0N 1N 2N 2NC 3G 3GC
series PLC can use direct specification of buffer memory.
Dimensions: mm (inches)
Mass (Weight): Approx. 0.2kg (0.44lbs)
Accessories: Special Function block number label
37.3KΩ
VIN
250Ω
*2 IIN
COM
165KΩ
AG
37.3KΩ
VIN
250Ω
*1 IIN
COM
165KΩ
FX -2AD
PLC 2N
Extension cable
-2AD units can connect to the FX series PLC, up to 5 for FX
2N 0N
/FX or, up to 4 for the FX series PLC, all with powered extension units.
3UC 2NC
FX -2AD FX -2DA
2N 2N
50mA 85mA
5. Specifications
5.1 General specification
Item
, and the FX series
3U 3UC Dielectric withstand
500V AC 1min (Between all terminals and case)
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
Analog circuits 24V DC
Digital circuits 5V DC 20mA (Internal power supplied from the main unit)
Photo-coupler isolation between analog and digital circuits.
Isolation
No isolation between analog channels.
Number of occupied The blocks occupies either 8 input or output points
I/O points (can be either inputs or outputs)
5.3 Defining gain and offset
Item
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.
Range of analog input
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
Digital output 12bit
2.5mV:10V/4000(At shipment)
Resolution Change depending on the input
characteristic.
±
Integrated accuracy 0.1V
Processing time 2.5ms/1 channel (synchronized to the sequence program)
Input characteristics
Channel number enter
The input characteristic is the same for each channel.
6. Allocation of buffer memory (BFM)
6.1 Buffer memory
BFM
up to 8 for FX /FX /
1N, 2N 3G
b15 to b8 b7 to b4
number
#0 Reserved Current value of input data (lower 8bit data)
#1 Reserved
#2 to 16
#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
FX -3A
0N
stored. The current value data is stored by binary.
90mA
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⋅⋅⋅Channel (CH1,CH2) which does the analog to digital conversion is specified.
b0=0⋅⋅⋅CH1
b0=1⋅⋅⋅CH2
b1⋅⋅⋅0→1 The A/D conversion process is started.
Write/read data to the above-mentioned buffer memory according to the programming example of
"8.Program example".
Content
Content
±
10% 50mA (Internal power supplied from the main unit)
Voltage input Current input
-2AD for current or
2N
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 20mA
Analog value :0 to 10V
Digital value :0 to 4000
Digital value :0 to 4000
(At shipment)
4095
4095
4000
4000
0 4mA 20mA
0 10V
Analog value
Analog value
b3 b2 b1 b0
Current value of input data (higher 4bit data)
Reserved
Analog to digital Analog to digital
conversion beginning conversion channel
Reserved