USER’S GUIDE
JY992D74901G
This manual contains text, diagrams and explanations which will guide the reader in the correct installation
and operation of the FX
2N
-2DA 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
3S
/FX
3G
/FX
3GC
/
FX
3U
/FX
3U C
Programming Manual, FX
0N
/FX
1N
/FX
2 N
/FX
2N C
/FX
3 G
/FX
3GC
/FX
3U
/FX
3 UC
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
2N
series manufactured
from December 1st, 1998 FX
2N
-2DA
Caution for EC Directive
The FX
2N
-2DA 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.
Standard
Remark
EN61131-2: 2007
Programmable controllers
-
Equipment requirements and tests
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
1. INTRODUCTION
The FX
2N
-2DA type analog output block (hereafter referred to as the FX
2N
-2DA) is used to convert a
digital value of 12 bits into an analog output of two points (voltage and current output), and to forward the
values to the Programmable Controller (hereafter referred to as a PLC).
FX
2N
-2DA can connected to the FX
0N
, FX
1N
, FX
2N
, FX
2NC
, FX
3G
, FX
3GC
, FX
3U
, and the FX
3UC
series
Programmable Controllers.
1) The analog output is selected from the voltage or current output by the method of connecting wires.
At this time, assume setting to be two channels common analog output.
2) The two analog output channels can accept outputs of 0 to 10V DC, 0 to 5V DC, or 4 to 20mA.
(A mixture of voltage/current output is possible.)
3) Resolution is 2.5mV (0 to 10V DC) and 4
µ
A(4 to 20mA).
4) The digital to analog conversion characteristics can be adjusted.
5) The block occupies 8 I/O points which can be allocated from either the inputs or outputs.
6) The data transfer with the PLC uses the FROM/TO instructions.
FX
3U
/FX
3UC
series PLC can use direct specification of buffer memory.
2. EXTERNAL DIMENSIONS AND PARTS
Dimensions: mm (inches)
3. WIRING
*1 Connect a 0.1 to 0.47
µ
F 25V DC capacitor respective to position *1 when there is voltage
ripple in the voltage output or there is a lot of noise.
*2 For voltage output please short circuit IOUT and COM as shown in the diagram.
*3 Channel number enter
.
4. CONNECTION WITH PROGRAMMABLE CONTROLLER
1) The FX
2N
-2DA and main unit are connected by a cable on the right of the main unit.
2) Up to 4 FX
2N
-2DA units can connect to the FX
0N
series PLC, up to 5 for FX
1N,
up to 8 for FX
2N
/FX
3G
/
FX
3GC
/FX
3U
/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.
FX
2N
:
Main unit and powered extension units of 32 points I/O or less. Consumption current available
for undermentioned special function blocks
≤
190mA
FX
2N
:
Main unit and powered extension units of I/O 48 points or more. Consumption current available
for undermentioned special function blocks
≤
300mA
FX
2NC
:
Up to 4 undermentioned special function blocks can be connected regardless of the system I/O.
FX
0N/1N
: Main unit and powered extension units. Up to 2 undermentioned special function blocks can be
connected regardless of the system I/O.
The consumption of the above units is to be subtracted from the service power supply of the host
PLC.
3) The blocks occupies 8 I/O points (the 8 points can be allocated from either inputs or outputs).
4) FX
2N
-2DA consumes 5V DC 30mA.
The total 5V consumption of all special function blocks connected to either a main unit or an
extension unit must not exceed the 5V source capacity of the system.
FX
2N
-2DA
FX
2N
-2AD
FX
0N
-3A
Consumption current of 24V DC for one unit
85mA
50mA
90mA
Mass (Weight): Approx. 0.2kg (0.44lbs)
Accessories: Special Function block number label
*1
VOUT
IOUT
COM
VOUT
IOUT
COM
Extension
cable
PLC
DC/DC
converter
+15V
-15V
AG
Inverter
etc
Recorder
etc
*3
Current output
Voltage output
FX
2N
-2DA
*2
{
5. SPECIFICATIONS
5.1 General specification
General specifications other than the above 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
5.3 Defining gain and offset
6. ALLOCATION OF BUFFER MEMORY (BFM)
6.1 Buffer memory
BFM#16: The D/A conversion data of the channel specified with BFM#17 (digital value) is written.
The D/A data is written in binary in order of the lower 8bit and higher 4bit and divided into two
portions.
BFM#17: b0•••The D/A conversion of CH2 begins by changing of 1
→
0.
b1•••The D/A conversion of CH1 begins by changing of 1
→
0.
b2•••The lower eight bit data for the D/A conversion is held by changing of 1
→
0.
Write data in the above-mentioned buffer memory by "8. Program example".
Item
Content
Dielectric withstand
voltage
500V AC 1min (Between analog output terminals and case)
Item
Content
Analog circuits
24V DC ±10% 85mA (Internal power supplied from the main unit)
Digital circuits
5V DC 30mA (Internal power supplied from the main unit)
Isolation
Photo-coupler isolation between analog and digital circuits.
(No isolation between analog channels.)
Number of occupied
I/O points
The blocks occupies either 8 input or output points.
(Can be either inputs or outputs)
Item
Voltage output
Current output
Range of analog output
At shipping, the unit is adjusted to a digital range of 0 to 4000 for an analog
voltage output of 0 to 10V DC. When using an FX
2N
-2DA for current or
differing voltage output except 0 to 10V DC, it is necessary to adjust the
offset and gain.
0 to 10V DC, 0 to 5V DC
(External load resistance 2K to
1M
Ω
)
4 to 20mA
(External load resistance 400
Ω
or
less)
Digital input
12bit
Resolution
2.5mV: 10V/4000(At shipment)
Change depending on the output
characteristic.
4
µ
A: (20-4)A/4000
Change depending on the output
characteristic.
Integrated accuracy
± 0.1V
± 0.16mA
Processing time
4ms/1 channel (synchronized to be sequence program)
Output characteristics
If a digital source data of greater than 12 bits is used, only the lower 12 bits
will be valid. Additional (upper) bits will be ignored
Use a digital value within the range from 0 to 4095.
The output characteristic can be set to each of the two channels.
BFM
number
b15 to b8
b7 to b3
b2
b1
b0
#0 to #15
Reserved
#16
Reserved
Digital source data for output (8 bit)
#17
Reserved
Lower data holding
bit
CH1 D/A
conversion
beginning
CH2 D/A
conversion
beginning
#18 or more
Reserved
Digital value
0
4000
10V
Analog value
Digital value
:0 to 10V
:0 to 4000
A
nal
og
va
lu
e
10.238V
40
95
at
shipment
A
nal
og
va
lu
e
Digital value
0
4000
20mA
4mA
Analog value
Digital value
:4 to 20mA
:0 to 4000
20.380mA
40
95
FX
2N
-2DA SPECIAL FUNCTION BLOCK