三菱FX2N-4DA模拟量输出模块用户指南：安装与操作详解

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本篇文档是三菱FX2N系列PLC的用户手册，专用于FX2N-4DA模拟量输出模块。FX2N-4DA是一个具备四通道功能的特殊功能块，每个通道可以将数字信号转换为模拟信号，通过D/A转换实现精确的电压或电流输出。模块的最大分辨率高达12位，确保了信号输出的精度。在选型和使用时，用户可以根据需求自行选择每个通道的电压范围，例如-10至10伏特直流（分辨率可达5毫伏）或0至20毫安（分辨率20微安）。这种灵活性使得模块适用于多种工业控制场景。数据传输方面，FX2N-4DA与FX2N主单元之间的通信是通过缓冲存储器交换完成的，共有32个16位的缓冲存储器，能够高效地处理和传输数据。模块占用FX2N扩展总线的8个输入/输出点，这意味着它既可以用作输入也可以用作输出，为系统设计提供了很大的灵活性。需要注意的是，在安装时，FX2N-4DA从FX2N主单元或供电扩展单元的5伏电源轨上抽取30毫安电流，因此在电力供应规划时要确保充足。重量方面，FX2N-4DA大约重0.3公斤（约0.66磅），对于便携性和集成到小型设备中非常适宜。阅读此用户手册前，确保对安装和操作流程有充分理解，遵循安全注意事项，以确保模块的正确安装和有效运行。此外，对于更深入的操作指导和技术细节，用户还需参考《FX编程手册》和《FX2N系列硬件手册》。

This manual contains text, diagrams and explanations which will guide the reader in the correct installation and

operation of the FX

2N-4DA 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 PROGRAMMING MANUAL, FX

2N SERIES HARDWARE MANUAL .

• The FX2N-4DA analog special function block has four output channels. The output channels take a digital value and

output an equivalent analog signal. This is called a D/A conversion. The FX

2N-4DA has maximum resolution of 12

bits.

• The selection of voltage or current based input/output is by user wiring. Analog ranges of -10 to 10V DC (resolution:

5mV), and/or 0 to 20mA (resolution: 20µA) maybe selected independently for each channel.

• Data transfer between the FX2N-4DA and the FX2N main unit is by buffer memory exchange. There are 32 buffer

memories (each of 16 bits) in the FX

2N-4DA.

• The FX2N-4DA occupies 8 points of I/O on the FX2N expansion bus. The 8 points can be allocated from either inputs

or outputs. The FX

2N-4DA draws 30mA from the 5V rail of the FX2N main unit or powered extension unit.

● Weight : Approx. 0.3 kg (0.66 lbs) ● Accessory: Special block number label

Handling of crimp-style terminal

• Be sure to use the crimp-style terminals that satisfy the dimen-

sional requirements shown in the left figure.

• Apply 0.5 to 0.8 N⋅m (5 to 8 kgf⋅cm) torque to tighten the termi-

nals. Firmly tighten the terminals to prevent abnormal operation.

POWER

D/A

24V

FX2N-4DA

I+

V+

I+

VI-

CH4

CH3

CH2

CH1

V+

I+V+

I+

V+

24+

24-

VI-

4(0.16)

55(2.17)

90(3.54)

87(3.43)

55(2.17)

80(3.15)

9(0.35)

4(0.16)

CH1

V+

24+

24-

VI-

CONNECTION TO PROGRAMMABLE CONTROLLER

Various special blocks controlled by the FROM/TO commands, such as the analog input blocks high-speed counter

blocks, etc. can be connected to the FX

2N programmable controller (MPU), or connected to the right side of the other

extension blocks or units. Up to eight special blocks can be connected to a single MPU in the numeric order of No. 0 to

No. 7.

WIRING: The terminal layout shown below may differ from the actual layout. For the correct terminal layout, refer to

section 2 External Dimensions and Parts.

ENVIRONMENTAL SPECIFICATIONS

Item Specification

Environmental specifications (excluding following) Same as those for the FX

2N main unit

Dielectric withstand voltage 500V AC, 1min (between all terminals and ground)

PERFORMANCE SPECIFICATIONS

Item Voltage output Current output

Analog output range

-10V DC to +10V DC (External load

resistance: 2kΩ to 1MΩ).

DC 0mA to +20mA (External load resistance:

500Ω).

Digital input 16 bits, binary, with sign (Effective bits for numeric value: 11 bits and sign bit (1 bit))

Resolution

5mV (10V × 1/2000) 20µA (20mA × 1/1000)

Total accuracy

±1% (at full scale of +10V) ±1% (at full scale of +20mA)

Conversion speed

2.1ms for 4 channels (Change in the number of channels used will not change the conversion

speed.)

Isolation

Photo-coupler isolation between analog and digital circuits.

DC/DC converter isolation of power from FX

2N main unit.

No isolation between analog channels.

External power

supply

24V DC ±10% 200mA

Number of occupied

I/O points

8 points taken from the FX

2N expansion bus (can be either inputs or outputs)

Power consumption 5V, 30mA (Internal power supply from MPU or powered extension unit)

I/O characteristics

(Default: mode 0)

Follow the procedure

described in section 8

to change

At load resistance of 10kΩ At load resistance of 250Ω

At load resistance of 250Ω

Command sent from the programmable controller can

change the mode. The voltage/current output mode

selected will determine the output terminals used.

Data is transmitted between the FX

2N-4DA and the MPU via buffer memories (16-bit 32-point RAM).

Buffer memories marked “W” can be written to

using the T0 instruction in the MPU.

The status of BFM #0, #5, and #21, (marked E)

will be written to EEPROM, therefore the set

values will be retained even after turning off the

power.

➀ [BFM #0] Output mode select: The value of BFM #0 switches the analog output between voltage and current on

each channel. It takes the form of a 4 digit hexadecimal number. The first digit will be the command for channel

1 (CH1), and the second digit for channel 2 (CH2) etc. The numeric values of these four digits respectively

represent the following items:

O = 0:Sets the voltage output mode (-10 V to +10 V).

O = 1:Sets the current output mode (+4 mA to 20 mA).

O = 2:Sets the current output mode (0 mA to +20 mA).

Switching the output mode resets the I/O characteristics to the factory-set characteristics. Refer to the performance

specifications described in section 4.

Example: H2110 CH1 : Voltage output (-10 V to +10 V)

CH2 and CH3 : Current output (+4 mA to +20 mA)

CH4 : Current output (0 mA to +20 mA)

➁ [BFM #1, #2, #3 and #4]: Output data channels CH1, CH2, CH3, and CH4

BFM #1: Output data of CH1 (Initial value: 0) BFM #2: Output data of CH2 (Initial value: 0)

BFM #3: Output data of CH3 (Initial value: 0) BFM #4: Output data of CH4 (Initial value: 0)

➂ [BFM #5]: Data holding mode: While the programmable controller is in the STOP mode, the last output value in the

RUN mode will be held. To reset the value to the offset value, write the hexadecimal value in BFM #5 as follows:

O = 0: Holds the output.

O = 1: Resets to the offset value.

Example: H0011 ⋅⋅⋅⋅⋅⋅ CH1 and CH2 = Offset value CH3 and CH4 = Output holding

In addition to the above functions, the buffer memories can adjust the I/O characteristics of the FX

2N-4DA, and report

the status of the FX

2N-4DA to the programmable controller.

Buffer memories marked “W” can be written

to using the TO instruction in the MPU.

The status of BFM #0, #5, and #21, (marked

E) will be written to EEPROM, therefore the

set values will be retained even after turning

off the power.

*1:Offset data: Actual analog output value

when corresponding output

data (BFM #1 through #4) is 0

*2:Gain data: Actual analog output value

when corresponding output

data (BFM #1 through #4) is

+1,000

*3: When current output mode 1 (+4 mA to

+20 mA) is set, the offset data will be

automatically set to +4,000 and the gain

data to +20,000. When the current

output mode 2 (0 mA to +20 mA) is set,

the offset data will be automatically set

to 0 and the gain data to +20,000.

➃ [BFM #8 and #9] Offset/gain setting command: Changes offset and gain values of channels CH1 through CH4 by

writing 1 to the corresponding Hex digits of BFM #8 or #9. The current values will be valid until this command is

output.

BFM #8 BFM #9

O = 0: No changes done.

O = 1: Change data value.

(Program example : see section 8.)

➄ [BFM #10 through #17] Offset/gain data: The offset and gain values are changed by writing new data to BFM #10

through #17. The units of the data to be written is mV or µA. The data should be written and then BFM #8 and #9

set. Note that the data value will be rounded down to the nearest 5mV or 20µA.

➅ [BFM #20] Initialize: When K1 is written in BFM #20, all values will be initialized to the factory-settings.

(Note that the BFM #20 data will override the BFM #21 data.) This initialize function is convenient if you have an

error in adjustment.

➆ [BFM #21] I/O characteristics adjustment inhibit: Setting BFM #21 to 2 inhibits the user from inadvertent adjustment

of I/O characteristics. The adjustment inhibit function, once set, will be valid until the Permit command (BFM

#21=1) is set. The initial value is 1 (Permit). The set value will be retained even after power-off.

FX2N-4DA SPECIAL FUNCTION BLOCK

USER’S GUIDE

JY992D65901A

EXTERNAL DIMENSIONS AND PARTS

➀ Extension cable

➁ Power indicator lamp (LED)

5 V power is supplied from the programmable

controller to light this indicator lamp.

➂ Power supply terminals

(Screw terminal: M3 (0.12))

➃ Analog output terminals

(Screw terminals : M3 (0.12))

➄ 24 V power indicator lamp (LED)

24 VDC power is supplied to the terminals of the

2N-4DA to light this indicator lamp.

➅ D/A conversion indicator lamp (LED)

Flashes at a high speed if D/A conversion is

performing without a problem.

➆ Hook for DIN rail

➇ Groove for DIN rail mounting

(Width of DIN rail : 35 mm 1.38")

➈ Hole for direct mounting (2-φ4.5) (0.18)

*1: Use a twisted pair shielded cable for the analog

output. This cable should be wired away from power

lines or any other lines which could induce noise.

*2: Apply 1-point grounding at the load side of the output

cable (class 3 grounding: 100Ω or less).

*3: If electrical noise or a voltage ripple exists at the

output, connect a smoothing capacitor of 0.1 to

0.47µF, 25V.

*4: Connect the terminal on the FX

2N-4DA with the

terminal on the MPU of the programmable

controller.

*5: Shorting the voltage output terminal or connecting the

current output load to the voltage output terminal

may damage the FX

2N-4DA.

*6: The 24V DC service power of the programmable

controller can also be used.

*7: Do not connect any unit to the unused terminal

BFM Description

#0 E Output mode select. Factory setting H0000

Output data (Signed 16 bits binary: actual

value 11 bits + sign)

#1: CH1, #2: CH2, #3: CH3, #4: CH4

#5 E Data holding mode. Factory setting H0000

#6, #7 Reserved

BFM Description

#8(E) Offset/gain setting command CH1, CH2 Initial value H0000

#9(E) Offset/gain setting command CH3, CH4 Initial value H0000

#10 Offset data CH1 *1

Unit: mV or µA

Initial offset value: 0

Initial gain value: +5,000

#11 Gain data CH1 *2

#12 Offset data CH2 *1

#13 Gain data CH2 *2

#14 Offset data CH3 *1

#15 Gain data CH3 *2

#16 Offset data CH4 *1

#17 Gain data CH4 *2

#18, #19 Reserved

#20(E) Initialize. initial value = 0

#21 E I/O characteristics adjustment inhibit (Initial value 1)

#22-#28 Reserved

#29 Error status

#30 K3020 identification code

#31 Reserved

INTRODUCTION

INSTALLATION AND WIRING

SPECIFICATIONS

ALLOCATION OF BUFFER MEMORIES (BFM)

Mode 1 (Current

output: +4mA to +20mA)

Mode 2 (Current

output: 0mA to +20mA)

6.2mm

(0.24inches)

or less

FOR M3(0.12)

FX -16EX

X000-X027

Y000-Y027

X030

-X047

FX -48MR-ES/UL

FX -4AD

No.2

FX -4AD-PT

X050-X067

Y030-Y047

FX -32ER

FX -4DA

FX -48MR-ES/UL

POWER

A/D

24V

-4AD

POWER

D/A

24V

FX -4DA

No.1

No.0

POWER

24V

A/D

Special block

72 456130

1611 1514 1710 12 13

14 171510 12 13

72 456130

1611

OUT

X11 X13 X15 X17

X6 X10 X12 X14 X16

24+

COM X4

COM4

COM2

Y7 COM3

Y10

Y11

Y12

Y13

COM1

Y14

Y15

Y16

Y17

POWER

762720 22 23 24 25 2621

16 17

14 171510 12 13

724561302720 22 23 24 25 2621

1611

LX5X7

X13 X15 X17 X21 X23 X25

X4 X6 X10

X14 X16 X20 X22 X24

24+N

COM

COM4

Y24

Y25

COM5

Y27COM2

COM3

Y10

Y13COM1

Y0 Y2

Y14

Y15

Y20

Y21

Y22

Y23

Y26

POWER

T.V

CPU.E

PROG.E

DC24V±10%200mA

Class 3

Grounding

(100

Ω

or less)

Extension cable

24+

24-

FX -4DA

DC/DC

converter

+15V

CH1

CH2

V+

I +

VI -

V+

I +

VI -

Mixed output from the same channel is not possible.

*3 Inverter,etc.

Recorder,etc.

Analog output

Digital input

+10V

+10.235V

-2,000

+2,000

-10V

-10.24V

-2,048

+2,047

Mode 0 (Voltage

output: -10V to +10V)

Analog

output

+4mA

Digital input

+20mA

+1,000

Analog

output

Digital input

+20mA

+1,000

CH4 CH3 CH2 CH1

O2 G1

CH4 CH3 CH2 CH1

O4 G3

Output



mode 0

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