Mitsubishi Electric MELSEC-F FX0N-3A User Manual

FX0N-3A SPECIAL FUNCTION BLOCK

USER’S GUIDE

JY992D49001F

This manual contains text, diagrams and explanations which will guide the user in the correct installation
and operation of the FX0N-3A 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(ΙΙ), FX

0N

/FX1N/FX2N/FX

2NC

SERIES HARDWARE MANUAL.

1. Introduction

• The FX0N-3A analog special function block has two input channels and one output channel.
The input channels receive analog signals and convert them into digital values.
The output channel takes a digital value and outputs an equivalent analog signal.
The FX

0N

-3A has a maximum resolution of 8 bits.

• The selection of voltage or current based input/output is decided by user wiring.

•An FX0N-3A can connected to the FX2N, FX

2NC

, FX1N or FX0N series of Programmable Controllers

(Hereafter referred to as a PLC).

• All data transfers and parameter setups are adjusted through software control for the FX0N-3A, via
TO/FROM applied instructions in the PLC. Communications between the PLC and FX0N-3A are
protected by a photo-coupler.

•An FX

0N

-3A occupies 8 I/O points on the PLC’s expansion bus. The 8 I/O points can be allocated from

either inputs or outputs.

1.1 External Dimensions

2. Terminal layouts and wiring

• When a current input is used, ensure that the terminals marked [VIN*1] and [IIN*1] are linked.
Do not connect the [VOUT] and [IOUT] terminals when the current output is used.
*1 terminal number 1 or 2 is identified here.

• If any voltage ripple is experienced on the voltage inputs/outputs or if there is excessive electrical
noise, connect a capacitor of 0.1 to 0.47μF, approx. 25V rating at position *2.

P O W E R

D /A

G A IN

A /D

O F F S E T

A /D

G A IN

D /A

O F F S E T

P O W E R

V

I N

2

C O M 2

C O M 1

I

I N

1

I

I N

2

V

I N

1

V

IN

2

C O M

C O M

I

IN

1

I

IN

2

V

IN

1

C O M

V

O U T

I

O U T

C O M

V

O U T

I

O U T

3 5 m m
D I N r a i l
g r o o v e

9 ( 0 . 3 5 )

8 7 ( 3 . 4 3 )

M o u n t i n g h o l e ,
2 h o l e s 4 . 5
( 0 . 1 8 ) d i a

4 3 ( 1 . 6 9 )

4 ( 0 . 1 6 )

8 0 ( 3 . 1 5 )

9 0 ( 3 . 5 4 )

M 3 ( 0 . 1 2 )

t e r m i n a l s c r e w s

E x t e n s i o n
c a b l e

Mass: Approx. 0.2kg (0.44lbs) Dimensions: mm (inches)

V

I N

2

C O M 2

C O M 1

I

I N

1

I

I N

2

V

I N

1

V

I N

2

C O M 2

C O M 1

I

I N

1

I

I N

2

V

I N

1

C O M

V

O U T

I

O U T

C O M

V

O U T

I

O U T

+

+

+

+

+

+

C H 1

C H 2

C H 1

C H 2

* 2

* 2C u r r e n t

i n p u t

V o l t a g e
i n p u t

V o l t a g e
o u t p u t

C u r r e n t
o u t p u t

3. Connection with PLC

1) Up to 4 FX0N-3A units can connect to the FX0N series PLC, up to 5 for FX
4 for an FX

2NC

series PLC, all with powered extension units.
However the following limitation exists when the undermentioned special function blocks are con-
nected.

FX2N: Main unit and powered extension units of 32 I/O points or less. Consumption current available for

undermentioned special function blocks ≤ 190mA

FX2N: Main unit and powered extension units of 48 I/O 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 current of the above units is to be subtracted from the service power supply of the host
PLC.

2) FX0N-3A consumes 5V DC by 30mA. The total 5V consumption of all special function blocks
connected to either the FX

2N or FX2NC

main unit or an FX2N extension unit must not exceed the 5V

voltage source capacity of the system.

3) The FX

0N

-3A and main unit are connected by a cable on the right of the main unit.

4. Installation notes and Usage

4.1 General and Environmental Specifications

4.2 Performance Specifications

FX2N-2AD FX

Consumption current of 24V DC for one unit. 50mA 85mA 90mA

Item Specification

General specifications
(ex. withstand voltage)

Same as those for the main unit

Withstand Voltage 500V AC for 1 minute (between ground and all other terminals)

Analog circuit power requirement 24V DC +/- 10%, 90mA (internal power supply from main unit)

Digital circuit power requirement 5V DC, 30mA (internal power supply from main unit)

Isolation

Photo-coupler isolation between analog and digital circuit.
No isolation between analog channels.

Number of occupied I/O points 8 I/O points from expansion bus. (either input or output)

Voltage input Current input

Analog input range

At shipment, 0 to 250 range selected for 0 to 10V DC input.
When using an FX

0N

-3A for current input or differing voltage inputs except 0 to
10V DC, it is necessary to readjust the offset and gain.
The module does not allow different input characteristics for two channels.

0 to 10V, 0 to 5V DC, resistance
200kΩ. Warning: this unit may be
damaged by input voltages in excess
of -0.5V, +15V.

4 to 20mA, resistance 250
this unit may be damaged by input
currents in excess of -2mA, +60mA.

Digital resolution 8 bits

Smallest input sig­nal resolution

40mV: 0 to 10V/0 to 250(At shipment)
Change depending on the input
characteristic.

64

μ

Change depending on the input
characteristic.

Overall accuracy ± 0.1V ± 0.16mA

Processing time TO instruction processing time x 2 + FROM instruction processing time

Input characteristics

The module does not allow different input characteristics for two channels.

2 5 0

2 5 5

1 0

1 0 . 2 V

0

D I G I T A L V A L U E

A N A L O G I N P U T V O L T S

1

0 . 0 4 0

2 5 0

2 5 5

5

0

D I G I T A L V A L U E

A N A L O G I N P U T V O L T S

1

0 . 0 2 0

[At shipment]

2 5 0

2 5 5

2 0

2 0 . 3 2 m A

0

D I G I T A L V A L U E

A N A L O G O U T P U T m A

4

1

4 . 0 6 4

2 5 0

2 5 5

1 0

1 0 . 2 V

0

D I G I T A L V A L U E

A N A L O G O U T P U T

V O L T S

0 . 0 4 0

1

2 5 0

2 5 5

5

5 . 1 V

0

D I G I T A L V A L U E

A N A L O G O U T P U T

V O L T S

0 . 0 2 0

1

Industrial

automation

Elincom

Group

European

Union:

www.elinco.eu

Russia:

www.elinc.ru

ΙΙ

), FX

0N

0N

-3A, via

0N

-3A are

P O W E R

D /A

G A IN

A /D

O F F S E T

A /D

G A IN

D /A

O F F S E T

V

I N

2

C O M 2

C O M 1

I

I N 1

I

I N 2

V

I N 1

V

IN

2

C O M

C O M

I

IN

1

I

IN

2

V

IN

1

C O M

V

O U T

I O U T

C O M

V

O U T

IO U T

9 0 ( 3 . 5 4 )

M 3 ( 0 . 1 2 )

t e r m i n a l s c r e w s

C O M

V O U T

I

O U T

C O M

V O U T

I

O U T

+

+

V o l t a g e
o u t p u t

C u r r e n t
o u t p u t

3. Connection with PLC

1) Up to 4 FX0N-3A units can connect to the FX0N series PLC, up to 5 for FX

1N,

up to 8 for FX2N or, up to

4 for an 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 I/O points or less. Consumption current available for

undermentioned special function blocks ≤ 190mA

FX

2N

: Main unit and powered extension units of 48 I/O 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 current of the above units is to be subtracted from the service power supply of the host
PLC.

2) FX

0N

-3A consumes 5V DC by 30mA. The total 5V consumption of all special function blocks

connected to either the FX

2N or FX2NC

main unit or an FX2N extension unit must not exceed the 5V

voltage source capacity of the system.

3) The FX

0N

-3A and main unit are connected by a cable on the right of the main unit.

4. Installation notes and Usage

4.1 General and Environmental Specifications

4.2 Performance Specifications

FX2N-2AD FX2N-2DA FX0N-3A

Consumption current of 24V DC for one unit. 50mA 85mA 90mA

Item Specification

General specifications
(ex. withstand voltage)

Same as those for the main unit

Withstand Voltage 500V AC for 1 minute (between ground and all other terminals)

Analog circuit power requirement 24V DC +/- 10%, 90mA (internal power supply from main unit)

Digital circuit power requirement 5V DC, 30mA (internal power supply from main unit)

Isolation

Photo-coupler isolation between analog and digital circuit.
No isolation between analog channels.

Number of occupied I/O points 8 I/O points from expansion bus. (either input or output)

Voltage input Current input

Analog input range

At shipment, 0 to 250 range selected for 0 to 10V DC input.
When using an FX

0N

-3A for current input or differing voltage inputs except 0 to
10V DC, it is necessary to readjust the offset and gain.
The module does not allow different input characteristics for two channels.

0 to 10V, 0 to 5V DC, resistance
200kΩ. Warning: this unit may be
damaged by input voltages in excess
of -0.5V, +15V.

4 to 20mA, resistance 250Ω. Warning:
this unit may be damaged by input
currents in excess of -2mA, +60mA.

Digital resolution 8 bits

Smallest input sig­nal resolution

40mV: 0 to 10V/0 to 250(At shipment)
Change depending on the input
characteristic.

64μA: 4 to 20mA /0 to 250
Change depending on the input
characteristic.

Overall accuracy ± 0.1V ± 0.16mA

Processing time TO instruction processing time x 2 + FROM instruction processing time

Input characteristics

The module does not allow different input characteristics for two channels.

2 5 0

2 5 5

2 0

2 0 . 3 2 m A

0

D I G I T A L V A L U E

A N A L O G I N P U T m A

4

1

4 . 0 6 4

2 5 0

2 5 5

1 0

1 0 . 2 V

0

D I G I T A L V A L U E

A N A L O G I N P U T V O L T S

1

0 . 0 4 0

2 5 0

2 5 5

5

5 . 1 V

0

D I G I T A L V A L U E

A N A L O G I N P U T V O L T S

1

0 . 0 2 0

[At shipment]

5. Allocation of Buffer Memories (BFM)

When FNC176(RD3A) and FNC177(WR3A) are used with FX
more), the allocation of the buffer memory (BFM) need not be considered.

• BFM 17:
b0 = 0 analog input channel 1 is selected
b0 = 1 analog input channel 2 is selected
b1 = 0 Ö1, the A/D conversion process is started
b2 = 1 Ö 0, the D/A conversion process is started

• Note: These buffer memory devices are stored/located within the FX

6. Diagnostics

6.1 Preliminary Checks

a) Check whether the input/output wiring and/or expansion cables are properly connected.

b) Check that the system configuration rules for the host PLC have not been broken.

c) Ensure that the correct operating range has been selected for the application.

d) As the status of the PLC changes (RUN

operate in the following manner.

Status change of the host PLC:

- RUN Ö STOP: The last operational value used by the analog output channel during RUN
operation is retained during STOP mode.

-STOP Ö RUN: Once the host PLC is switched back into RUN mode the analog output reacts as
normal to the program controlled, digital values.
PLC power shutdown: The analog output signal ceases operation.

e) Remember that only 8 bit digital values (0 to 255) are valid for use with the analog output of the

FX

0N

-3A

Analog output range

At shipment, 0 to 250 range selected for 0 to 10V DC output.
When using an FX
10V DC, it is necessary to readjust the offset and gain.

DC 0 to 10V, 0 to 5V external load:
1kΩ to 1M

Ω

Digital resolution 8 bits

Smallest output
signal resolution

40mV: 0 to 10V/0 to 250(At shipment)
Change depending on the input
characteristic.

Overall accuracy ± 0.1V ± 0.16mA

Processing time TO instruction processing time x 3

Output
characteristics

If digital source data of greater than 8 bits is used, only the lower 8 bits will be
valid. Additional (upper) bits will be ignored

BFM

No.

b15-b8 b7 b6 b5 b4 b3 b2 b1 b0

0

Reserved

Current value input data (stored in 8 bits) of the A/D channel selected by b0 of BFM#17

16

Current value output data on D/A channel (stored in 8 bits)

17

1-5,

18-31

2 5 0

2 5 5

2 0

2 0 . 3 2 m A

0

D I G I T A L V A L U E

A N A L O G O U T P U T m A

4

1

4 . 0 6 4

2 5 0

2 5 5

1 0

1 0 . 2 V

0

D I G I T A L V A L U E

A N A L O G O U T P U T

V O L T S

0 . 0 4 0

1

2 5 0

2 5 5

5

5 . 1 V

0

D I G I T A L V A L U E

A N A L O G O U T P U T

V O L T S

0 . 0 2 0

1

[At shipment]

1N,

up to 8 for FX2N or, up to

2N

-2DA FX0N-3A

Ω

. Warning:

2 5 0

2 5 5

2 0

2 0 . 3 2 m A

0

D I G I T A L V A L U E

A N A L O G I N P U T m A

4

1

4 . 0 6 4

5. Allocation of Buffer Memories (BFM)

When FNC176(RD3A) and FNC177(WR3A) are used with FX1N,FX2N (V3.00 or more) or FX

2NC

(V3.00 or

more), the allocation of the buffer memory (BFM) need not be considered.

• BFM 17:
b0 = 0 analog input channel 1 is selected
b0 = 1 analog input channel 2 is selected
b1 = 0 Ö1, the A/D conversion process is started
b2 = 1 Ö 0, the D/A conversion process is started

• Note: These buffer memory devices are stored/located within the FX

0N

-3A

6. Diagnostics

6.1 Preliminary Checks

a) Check whether the input/output wiring and/or expansion cables are properly connected.

b) Check that the system configuration rules for the host PLC have not been broken.

c) Ensure that the correct operating range has been selected for the application.

d) As the status of the PLC changes (RUN Ö STOP, STOP Ö RUN, etc.), the analog output status will

operate in the following manner.

Status change of the host PLC:

- RUN Ö STOP: The last operational value used by the analog output channel during RUN
operation is retained during STOP mode.

-STOP Ö RUN: Once the host PLC is switched back into RUN mode the analog output reacts as
normal to the program controlled, digital values.
PLC power shutdown: The analog output signal ceases operation.

e) Remember that only 8 bit digital values (0 to 255) are valid for use with the analog output of the

FX

0N

-3A

Voltage output Current output

Analog output range

At shipment, 0 to 250 range selected for 0 to 10V DC output.
When using an FX

0N

-3A for current output or differing voltage output except 0 to

10V DC, it is necessary to readjust the offset and gain.

DC 0 to 10V, 0 to 5V external load:
1kΩ to 1M

Ω

4 to 20mA, external load: 500Ω or less

Digital resolution 8 bits

Smallest output
signal resolution

40mV: 0 to 10V/0 to 250(At shipment)
Change depending on the input
characteristic.

64μA: 4 to 20mA /0 to 250
Change depending on the input
characteristic.

Overall accuracy ± 0.1V ± 0.16mA

Processing time TO instruction processing time x 3

Output
characteristics

If digital source data of greater than 8 bits is used, only the lower 8 bits will be
valid. Additional (upper) bits will be ignored

BFM

No.

b15-b8 b7 b6 b5 b4 b3 b2 b1 b0

0

Reserved

Current value input data (stored in 8 bits) of the A/D channel selected by b0 of BFM#17

16

Current value output data on D/A channel (stored in 8 bits)

17

Reserved

D/A

start

A/D

start

A/D

channel

1-5,

18-31

Reserved

2 5 0

2 5 5

2 0

2 0 . 3 2 m A

0

D I G I T A L V A L U E

A N A L O G O U T P U T m A

4

1

4 . 0 6 4

2 5 0

2 5 5

1 0

1 0 . 2 V

0

D I G I T A L V A L U E

A N A L O G O U T P U T

V O L T S

0 . 0 4 0

1

2 5 0

2 5 5

5

5 . 1 V

0

D I G I T A L V A L U E

A N A L O G O U T P U T

V O L T S

0 . 0 2 0

1

[At shipment]

7. Change and adjustment method of input/output characteristic

7.1 Change in input/output characteristic

At shipment, 0 to 250 range selected for 0 to 10V DC input/output.
When using an FX

0N

-3A for current input/output or differing voltage input/output except 0 to 10V DC, it is
necessary to readjust the offset and gain.
The module does not allow different input characteristics for two channels.
Set analog values from 0 to 250 digital equivalent within the range specified in the table below when
changing the input/output characteristic.

Range of allowance of input/output characteristic

Resolution changes depending on the set value when the input/output characteristic is changed.
Example: Resolution becomes (5 to 0V)/250=20mV at voltage input 0 to 5V/0 to 250.
Overall accuracy does not change. (Voltage input

: ±0.1V, Current input: ±0.16mA)

7.2 Method of Calibration(A/D)

Both analog input channels share the same ‘setup’ and configuration. Hence only one channel needs to
be selected to perform the calibration for both analog input channels.
Use the following program and the appropriate wiring configuration to calibrate input channel 1 (and
indirectly channel 2) of the FX

0N

-3A.

7.2.1 Input Calibration Program

7.2.2 Calibrating the Offset

1) Run the previously detailed program. Ensure X02 is ON.

2) Generate an offset voltage/current (in accordance with the analog operation range to be selected, see

table below) using the selected generator or analog output.

3) Adjust the A/D OFFSET potentiometer (‘pot’) until a digital value of 1 is read in D00.

Note : Turn the ‘pot’ clockwise and the digital value will increase. The ‘pot’ requires 18 revolutions to

move between the minimum and maximum settings.

7.2.3 Calibrating the Gain

1) Run the previously detailed program. Ensure X02 is ON.

2) Generate a gain voltage/current (in accordance with the analog operation range to be selected, see

table below) using the selected generator or analog output.

3) Adjust the A/D GAIN potentiometer (‘pot’) until a digital value of 250 is read in D00.

Note 1: Turn the ‘pot’ clockwise and the digital value will increase. The ‘pot’ requires 18 revolutions to

move between the minimum and maximum settings.

Note 2: When necessary to maximize the 8 bit resolution, the digital value used in the gain adjustment

(detailed above) should be replaced with 255. This section has been written to demonstrate 250
full scale calibration.

Vo lt a ge

input

Current

input

Vo lt a ge

output

Current

output

Analog value when digital value is 0 0 to 1V 0 to 4mA 0V 4mA

Analog value when digital value is 250 5 to 10V 20mA 5 to 10V 20mA

Analog input range 0-10V DC 0-5V DC 4-20mA DC

Offset calibration value 0.040V 0.020V 4.064mA

Analog input range 0-10V DC 0-5V DC 4-20mA DC

Gain calibration value 10.000V 5.000V 20.000mA

P O W E R

D /A

G A I N

A / D

O F F S E T

A / D

G A I N

D /A

O F F S E T

V I N 2

C O M 2

C O M 1

I I N 1

I

I N 2

V

I N 1

V

+

+

P O W E R

D /A

G A I N

A / D

O F F S E T

A / D

G A I N

D /A

O F F S E T

V

I N

2

C O M 2

C O M 1

I

I N

1

I

I N

2

V

I N

1

C O M

V

V

O U T

I

O U T

+

P O W E R

A / D

O F F S E T

A

V I N 2

C O M 2

C O M 1

IIN1

I

IN 2

V

I N 1

+

P O W E R

D /A

G A I N

A / D

O F F S E T

A / D

G A I N

D /A

O F F S E T

A

V

I N

2

C O M 2

C O M 1I

I N

1

I

I N

2

V

I N

1

C O M

V

O U T

I

O U T

+

V o l t m e t e r

C u r r e n t g e n e r a t o r

A / D G A I N
D / A O F F S E T
D / A G A I N

V o l t a g e g e n e r a t o r

E x t e r n a l
v o l t a g e
i n p u t

I n t e g r a l
v o l t a g e
i n p u t

E x t e r n a l
c u r r e n t
i n p u t

I n t e g r a l
c u r r e n t
i n p u t

A m m e t e r

A / D O F F S E T

TO K0 K17 H00 K1

K0 K17 H02 K1

K0 K0 D0 K1

TO

X02

FROM

7.3 Method of Calibration(D/A)

Use the following program and the appropriate wiring configuration to calibrate the output channel of the
FX

0N

-3A

7.3.1 Output Calibration Program

7.3.2 Calibrating the Offset

1) Run the previously detailed program. Ensure X00 is ON and X01 is OFF.

2) Adjust the D/A OFFSET potentiometer (‘pot) until the selected meter displays the appropriate offset
voltage/current (in accordance with the analog operation range selected, see table below).

Note: Turn the ‘pot’ clockwise and the analog output signal will increase. The ‘pot’ requires 18 revolutions

to move between the minimum and maximum settings.

7.3.3 Calibrating the Gain

1) Run the previously detailed program. Ensure X00 is OFF and X01 is ON.

2) Adjust the D/A GAIN potentiometer (‘pot’) until selected meter displays the appropriate gain voltage/
current (in accordance with the analog operation range selected, see table below).

Note 1: Turn the ‘pot’ clockwise and the analog output signal will increase. The ‘pot’ requires 18

revolutions to move between the minimum and maximum settings

Note 2: When it is necessary to maximize the 8 bit resolution, the digital value used in the gain adjustment

(detailed above) should be replaced with 255. This section has been written to demonstrate a 250
full scale calibration.

8. Program example

8.1 Using Analog Inputs

The buffer memories (BFM) of the FX0N-3A are written TO or read FROM by the host PLC. The following
program reads the analog input from channel 1 of the FX

0N

-3A when M0 is ON, and the analog input data

of channel 2 when M1 is ON.

(H00) is written to BFM#17, selecting A/D input channel 1.
(H02) is written to BFM#17 starting the A/D conversion process for
channel 1.
BFM#0 is read, storing the current value of channel 1 in register
D00
(H01) is written to BFM#17 now selecting A/D input channel 2.
(H03) is written to BFM#17 to re-start the A/D conversion process,
but for channel 2.
BFM#0 is read, storing the current value of channel 2 in register
D01.

The time T

AD

required to read an analog input channel is calculated as follows:

T

AD

= (TO instruction processing time) × 2 + (FROM instruction processing time)

Note : The 3 (TO/FROM) command format shown above should always be used when reading data from

the FX

0N

-3A’s analog input channels.

Analog output range 0-10V DC 0-5V DC 4-20mA DC

Offset calibration meter value 0.040V 0.020V 4.064mA

Analog

outp

ut range

0-10V DC 0-5V DC 4-20mA DC

Gain calibration meter value 10.000V 5.000V 20.000mA

D/A

GAIN

A/D

GAIN

D/A

OFFSET

V

COM

V

OUT

I

OUT

+

D/A

GAIN

A/D

GAIN

D/A

OFFSET

A

+

Voltage
output

Voltmeter

TO K0 K16 K1 K1

K0 K17 H04 K1

K0 K17 H00 K1

TO

X00TOX01

X00 X0 1

TO K0 K17 H00 K1

K0 K17 H02 K1

FROM

K0 K0 D00 K1

TO

TO K0 K17 H01 K1

K0 K17 H03 K1

FROM

K0 K0 D01 K1

TO

M0

M1

TO K0 K16 D02 K1

K0 K17 H04 K1

K0 K17 H00 K1

TO

M0

TO

HEAD OFFICE : TOKYO BUILDING, 2-7-3 MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN

0.16mA)

Vo lt a ge

output

Current

output

P O W E R

A / D

O F F S E T

A

V I N 2

C O M 2

C O M 1

IIN1

I

IN 2

V

I N 1

+

P O W E R

D /A

G A I N

A / D

G A I N

D /A

O F F S E T

A

C O M

V

O U T

I

O U T

+

C u r r e n t g e n e r a t o r

E x t e r n a l
c u r r e n t
i n p u t

I n t e g r a l
c u r r e n t
i n p u t

A m m e t e r

7.3 Method of Calibration(D/A)

Use the following program and the appropriate wiring configuration to calibrate the output channel of the
FX

0N

-3A

7.3.1 Output Calibration Program

7.3.2 Calibrating the Offset

1) Run the previously detailed program. Ensure X00 is ON and X01 is OFF.

2) Adjust the D/A OFFSET potentiometer (‘pot) until the selected meter displays the appropriate offset
voltage/current (in accordance with the analog operation range selected, see table below).

Note: Turn the ‘pot’ clockwise and the analog output signal will increase. The ‘pot’ requires 18 revolutions

to move between the minimum and maximum settings.

7.3.3 Calibrating the Gain

1) Run the previously detailed program. Ensure X00 is OFF and X01 is ON.

2) Adjust the D/A GAIN potentiometer (‘pot’) until selected meter displays the appropriate gain voltage/
current (in accordance with the analog operation range selected, see table below).

Note 1: Turn the ‘pot’ clockwise and the analog output signal will increase. The ‘pot’ requires 18

revolutions to move between the minimum and maximum settings

Note 2: When it is necessary to maximize the 8 bit resolution, the digital value used in the gain adjustment

(detailed above) should be replaced with 255. This section has been written to demonstrate a 250
full scale calibration.

8. Program example

8.1 Using Analog Inputs

The buffer memories (BFM) of the FX0N-3A are written TO or read FROM by the host PLC. The following
program reads the analog input from channel 1 of the FX

0N

-3A when M0 is ON, and the analog input data

of channel 2 when M1 is ON.

(H00) is written to BFM#17, selecting A/D input channel 1.
(H02) is written to BFM#17 starting the A/D conversion process for
channel 1.
BFM#0 is read, storing the current value of channel 1 in register
D00
(H01) is written to BFM#17 now selecting A/D input channel 2.
(H03) is written to BFM#17 to re-start the A/D conversion process,
but for channel 2.
BFM#0 is read, storing the current value of channel 2 in register
D01.

The time T

AD

required to read an analog input channel is calculated as follows:

T

AD

= (TO instruction processing time) × 2 + (FROM instruction processing time)

Note : The 3 (TO/FROM) command format shown above should always be used when reading data from

the FX

0N

-3A’s analog input channels.

Analog output range 0-10V DC 0-5V DC 4-20mA DC

Offset calibration meter value 0.040V 0.020V 4.064mA

Analog

outp

ut range

0-10V DC 0-5V DC 4-20mA DC

Gain calibration meter value 10.000V 5.000V 20.000mA

D/A

GAIN

A/D

GAIN

D/A

OFFSET

V

COM

V

OUT

I

OUT

+

D/A

GAIN

A/D

GAIN

D/A

OFFSET

A

COM

V

OUT

I

OUT

+

Voltage
output

Current
output

Voltmeter

Ammeter

TO K0 K16 K1 K1

K0 K17 H04 K1

K0 K17 H00 K1

TO

X00TOX01

TO K0 K16 K250 K1

K0 K17 H04 K1

K0 K17 H00 K1

TO

TO

X00 X0 1

TO K0 K17 H00 K1

K0 K17 H02 K1

FROM

K0 K0 D00 K1

TO

TO K0 K17 H01 K1

K0 K17 H03 K1

FROM

K0 K0 D01 K1

TO

M0

M1

8.2 Using Analog Outputs

The buffer memories (BFM) of the FX
following program, when M0 is turned ON the D/A conversion process is executed and an analog signal
equivalent to the digital value stored in this example, is output to register D02

The time T

AD

required to write an analog input channel is calculated as follows:

T

AD

= (TO instruction processing time)

Note : The 3 (TO) instruction format shown above should always be used when writing data to the

FX

0N

-3A’s analog output channel.

Details on both the FROM and TO instructions (functions 78 and 79 respectively) can be found in the
“FX series Programming Manual (

ΙΙ

8.3 Using FX1N, FX2N (V3.00 or more) or FX

Please use FNC 176 (RD3A) and FNC 177 (WR3A)
Refer to FX Series Programming Manual

9. Error Checking

If the FX0N-3A special function block does not seem to operate normally, check the following items:

• Check the status of POWER LED.
Lit: The extension cable is properly connected.
Otherwise: Check the connection of the extension cable.

• Check the external wiring.

• Check whether the output load connected to the analog output terminal is within the following
specified limits.
Voltage output: 1kΩ to 1MΩ, Current output: 500

• Check whether the impedance of the input device is within the specified limits.
Voltage input: 200kΩ, Current input: 250

• Check the calibration of the FX
as required. See previous two sections for a detailed explanation.

TO K0 K16 D02 K1

K0 K17 H04 K1

K0 K17 H00 K1

TO

M0

TO

Guidelines for the safety of the user and protection of the FX
function block

• This manual has been written to be used by trained and competent personnel. This is defined

by the European directives for machinery and EMC.

• If in doubt at any stage during the installation of the FX

electrical engineer who is qualified and trained to the local and national standards. If in doubt
about the operation or use of the FX
distributor.

• Under no circumstances will Mitsubishi Electric be liable or 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.

• Owing to the very great variety in possible application of this equipment, you must satisfy

yourself as to its suitability for your specific application.

Manual number : JY992D49001

Manual revision : F

Date : April 2015

JY992D49001F

HEAD OFFICE : TOKYO BUILDING, 2-7-3 MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN

COM

V

OUT

I

OUT

Current
output

K0 K17 H04 K1

K0 K17 H00 K1

8.2 Using Analog Outputs

The buffer memories (BFM) of the FX0N-3A are written TO, or read FROM by the host PLC. In the
following program, when M0 is turned ON the D/A conversion process is executed and an analog signal
equivalent to the digital value stored in this example, is output to register D02

The contents of D2 are written to BFM#16. This will be converted to
an analog output.
(H04) is written to BFM#17 to start the D/A conversion process.

The time T

AD

required to write an analog input channel is calculated as follows:

T

AD

= (TO instruction processing time) × 3

Note : The 3 (TO) instruction format shown above should always be used when writing data to the

FX

0N

-3A’s analog output channel.

Details on both the FROM and TO instructions (functions 78 and 79 respectively) can be found in the
“FX series Programming Manual (ΙΙ)”

8.3 Using FX1N, FX2N (V3.00 or more) or FX

2NC

(V3.00 or more) Series PLC’s

Please use FNC 176 (RD3A) and FNC 177 (WR3A)
Refer to FX Series Programming Manual ΙΙ.

9. Error Checking

If the FX0N-3A special function block does not seem to operate normally, check the following items:

• Check the status of POWER LED.
Lit: The extension cable is properly connected.
Otherwise: Check the connection of the extension cable.

• Check the external wiring.

• Check whether the output load connected to the analog output terminal is within the following
specified limits.
Voltage output: 1kΩ to 1MΩ, Current output: 500Ω or less

• Check whether the impedance of the input device is within the specified limits.
Voltage input: 200kΩ, Current input: 250Ω.

• Check the calibration of the FX

0N

-3A’s analog channels (input and output) using a voltmeter/ ammeter

as required. See previous two sections for a detailed explanation.

TO K0 K16 D02 K1

K0 K17 H04 K1

K0 K17 H00 K1

TO

M0

TO

Guidelines for the safety of the user and protection of the FX0N-3A Special
function block

• This manual has been written to be used by trained and competent personnel. This is defined

by the European directives for machinery and EMC.

• If in doubt at any stage during the installation of the FX

0N

-3A always consult a professional
electrical engineer who is qualified and trained to the local and national standards. If in doubt
about the operation or use of the FX

0N

-3A please consult the nearest Mitsubishi Electric

distributor.

• Under no circumstances will Mitsubishi Electric be liable or 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.

• Owing to the very great variety in possible application of this equipment, you must satisfy
yourself as to its suitability for your specific application.

Manual number : JY992D49001

Manual revision : F

Date : April 2015

JY992D49001F

Effective April 2015
Specifications are subject to

change without notice

FX0N-3A SPECIAL FUNCTION BLOCK

USER’S GUIDE

JY992D49001F

This manual contains text, diagrams and explanations which will guide the user in the correct installation
and operation of the FX

0N

-3A 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(ΙΙ), FX

0N

/FX1N/FX2N/FX

2NC

SERIES HARDWARE MANUAL.

1. Introduction

• The FX0N-3A analog special function block has two input channels and one output channel.
The input channels receive analog signals and convert them into digital values.
The output channel takes a digital value and outputs an equivalent analog signal.
The FX

0N

-3A has a maximum resolution of 8 bits.

• The selection of voltage or current based input/output is decided by user wiring.

•An FX

0N

-3A can connected to the FX2N, FX

2NC

, FX1N or FX0N series of Programmable Controllers

(Hereafter referred to as a PLC).

• All data transfers and parameter setups are adjusted through software control for the FX

0N

-3A, via

TO/FROM applied instructions in the PLC. Communications between the PLC and FX

0N

-3A are

protected by a photo-coupler.

•An FX

0N

-3A occupies 8 I/O points on the PLC’s expansion bus. The 8 I/O points can be allocated from

either inputs or outputs.

1.1 External Dimensions

2. Terminal layouts and wiring

• When a current input is used, ensure that the terminals marked [VIN*1] and [IIN*1] are linked.
Do not connect the [VOUT] and [IOUT] terminals when the current output is used.
*1 terminal number 1 or 2 is identified here.

• If any voltage ripple is experienced on the voltage inputs/outputs or if there is excessive electrical
noise, connect a capacitor of 0.1 to 0.47μF, approx. 25V rating at position *2.

PO W ER

D/A

G AI N

A/D

O FF S E T

A/D

G AI N

D/A

O FF S E T

PO W ER

V

IN

2

C O M 2

C O M 1

I

IN 1

I

IN 2

V

IN 1

V

IN

2

C O M

C O M

I

IN

1

I

IN

2

V

IN

1

C O M

V

O U T

IO U T

C O M

V

O UT

IO U T

3 5 m m
D IN r a i l
g r o o v e

9 ( 0 . 3 5 )

8 7 ( 3 . 4 3 )

M o u n t i n g h o l e ,
2 h o l e s 4 . 5
( 0 .1 8 ) d i a

4 3 ( 1 . 6 9 )

4 ( 0 . 1 6 )

8 0 ( 3 . 1 5 )

9 0 ( 3 . 5 4 )

M 3 ( 0 . 1 2 )

t e r m i n a l s c r e w s

E x t e n s io n
c a b le

Mass: Approx. 0.2kg (0.44lbs) Dimensions: mm (inches)

V I N 2

C O M 2

C O M 1

II N 1

I

IN 2

V

IN 1

V

IN 2 C O M 2

C O M 1

II N 1

I

IN 2

V

IN 1

C O M

V O U T

I

O U T

C O M

V O U T

I

O U T

+

+

+

+

+

+

C H 1

C H 2

C H 1

C H 2

* 2

* 2C u r r e n t

i n p u t

V o lt a g e
i n p u t

V o lt a g e
o u tp u t

C u r r e n t
o u tp u t

3. Connection with PLC

1) Up to 4 FX0N-3A units can connect to the FX0N series PLC, up to 5 for FX

1N,

up to 8 for FX2N or, up to

4 for an 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 I/O points or less. Consumption current available for

undermentioned special function blocks ≤ 190mA

FX

2N

: Main unit and powered extension units of 48 I/O 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 current of the above units is to be subtracted from the service power supply of the host
PLC.

2) FX

0N

-3A consumes 5V DC by 30mA. The total 5V consumption of all special function blocks

connected to either the FX

2N or FX2NC

main unit or an FX2N extension unit must not exceed the 5V

voltage source capacity of the system.

3) The FX

0N

-3A and main unit are connected by a cable on the right of the main unit.

4. Installation notes and Usage

4.1 General and Environmental Specifications

4.2 Performance Specifications

FX2N-2AD FX2N-2DA FX0N-3A

Consumption current of 24V DC for one unit. 50mA 85mA 90mA

Item Specification

General specifications
(ex. withstand voltage)

Same as those for the main unit

Withstand Voltage 500V AC for 1 minute (between ground and all other terminals)

Analog circuit power requirement 24V DC +/- 10%, 90mA (internal power supply from main unit)

Digital circuit power requirement 5V DC, 30mA (internal power supply from main unit)

Isolation

Photo-coupler isolation between analog and digital circuit.
No isolation between analog channels.

Number of occupied I/O points 8 I/O points from expansion bus. (either input or output)

Voltage input Current input

Analog input range

At shipment, 0 to 250 range selected for 0 to 10V DC input.
When using an FX

0N

-3A for current input or differing voltage inputs except 0 to
10V DC, it is necessary to readjust the offset and gain.
The module does not allow different input characteristics for two channels.

0 to 10V, 0 to 5V DC, resistance
200kΩ. Warning: this unit may be
damaged by input voltages in excess
of -0.5V, +15V.

4 to 20mA, resistance 250Ω. Warning:
this unit may be damaged by input
currents in excess of -2mA, +60mA.

Digital resolution 8 bits

Smallest input sig­nal resolution

40mV: 0 to 10V/0 to 250(At shipment)
Change depending on the input
characteristic.

64μA: 4 to 20mA /0 to 250
Change depending on the input
characteristic.

Overall accuracy ± 0.1V ± 0.16mA

Processing time TO instruction processing time x 2 + FROM instruction processing time

Input characteristics

The module does not allow different input characteristics for two channels.

2 5 0

2 5 5

2 0

2 0 . 3 2 m A

0

D I G I T A L V A L U E

A N A L O G I N P U T m A

4

1

4 . 0 6 4

2 5 0

2 5 5

1 0

1 0 . 2 V

0

D I G I T A L V A L U E

A N A L O G I N P U T V O L T S

1

0 . 0 4 0

2 5 0

2 5 5

5

5 . 1 V

0

D I G I T A L V A L U E

A N A L O G I N P U T V O L T S

1

0 . 0 2 0

[At shipment]

5. Allocation of Buffer Memories (BFM)

When FNC176(RD3A) and FNC177(WR3A) are used with FX1N,FX2N (V3.00 or more) or FX

2NC

(V3.00 or

more), the allocation of the buffer memory (BFM) need not be considered.

• BFM 17:
b0 = 0 analog input channel 1 is selected
b0 = 1 analog input channel 2 is selected
b1 = 0 Ö1, the A/D conversion process is started
b2 = 1 Ö 0, the D/A conversion process is started

• Note: These buffer memory devices are stored/located within the FX

0N

-3A

6. Diagnostics

6.1 Preliminary Checks

a) Check whether the input/output wiring and/or expansion cables are properly connected.

b) Check that the system configuration rules for the host PLC have not been broken.

c) Ensure that the correct operating range has been selected for the application.

d) As the status of the PLC changes (RUN Ö STOP, STOP Ö RUN, etc.), the analog output status will

operate in the following manner.

Status change of the host PLC:

- RUN Ö STOP: The last operational value used by the analog output channel during RUN
operation is retained during STOP mode.

-STOP Ö RUN: Once the host PLC is switched back into RUN mode the analog output reacts as
normal to the program controlled, digital values.
PLC power shutdown: The analog output signal ceases operation.

e) Remember that only 8 bit digital values (0 to 255) are valid for use with the analog output of the

FX

0N

-3A

Voltage output Current output

Analog output range

At shipment, 0 to 250 range selected for 0 to 10V DC output.
When using an FX

0N

-3A for current output or differing voltage output except 0 to

10V DC, it is necessary to readjust the offset and gain.

DC 0 to 10V, 0 to 5V external load:
1kΩ to 1M

Ω

4 to 20mA, external load: 500Ω or less

Digital resolution 8 bits

Smallest output
signal resolution

40mV: 0 to 10V/0 to 250(At shipment)
Change depending on the input
characteristic.

64μA: 4 to 20mA /0 to 250
Change depending on the input
characteristic.

Overall accuracy ± 0.1V ± 0.16mA

Processing time TO instruction processing time x 3

Output
characteristics

If digital source data of greater than 8 bits is used, only the lower 8 bits will be
valid. Additional (upper) bits will be ignored

BFM

No.

b15-b8 b7 b6 b5 b4 b3 b2 b1 b0

0

Reserved

Current value input data (stored in 8 bits) of the A/D channel selected by b0 of BFM#17

16

Current value output data on D/A channel (stored in 8 bits)

17

Reserved

D/A
start

A/D

start

A/D

channel

1-5,

18-31

Reserved

2 5 0

2 5 5

2 0

2 0 .3 2 m A

0

D I G IT A L V A L U E

A N A L O G O U T P U T m A

4

1

4 .0 6 4

2 5 0

2 5 5

1 0

1 0 .2 V

0

D I G IT A L V A L U E

A N A L O G O U T P U T

V O L T S

0 .0 4 0

1

2 5 0

2 5 5

5

5 .1 V

0

D I G IT A L V A L U E

A N A L O G O U T P U T

V O L T S

0 .0 2 0

1

[At shipment]

HEAD OFFICE : TOKYO BUILDING, 2-7-3 MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN

7. Change and adjustment method of input/output characteristic

7.1 Change in input/output characteristic

At shipment, 0 to 250 range selected for 0 to 10V DC input/output.
When using an FX

0N

-3A for current input/output or differing voltage input/output except 0 to 10V DC, it is
necessary to readjust the offset and gain.
The module does not allow different input characteristics for two channels.
Set analog values from 0 to 250 digital equivalent within the range specified in the t able below when
changing the input/output characteristic.

Range of allowance of input/output characteristic

Resolution changes depending on the set value when the input/output characteristic is changed.
Example: Resolution becomes (5 to 0V)/250=20mV at voltage input 0 to 5V/0 to 250.
Overall accuracy does not change. (Voltage input

: ±0.1V, Current input: ±0.16mA)

7.2 M ethod of Calibration(A/D)

Both analog input channels share the same ‘setup’ and configuration. Hence only one ch annel needs to
be selected to perform the calibration for both analog input channels.
Use the following program and the appropriate wiring configuration to calibrate input channel 1 (and
indirectly channel 2) of the FX

0N

-3A.

7.2.1 Input Calibration Program

7.2.2 Calibrating the Offset

1) Run the previously detailed program. Ensure X02 is ON.

2) Generate an offset voltage/current (in accordance with the analog operation range to be selected, see

table below) using the selected generator or analog output.

3) Adjust the A/D OFFSET potentiometer (‘pot’) until a digital value of 1 is read in D00.

Note : Turn the ‘pot’ clockwise and the digital value will increase. The ‘pot’ requires 18 revolutions to

move between the minimum and maximum settings.

7.2.3 Calibrating the Gain

1) Run the previously detailed program. Ensure X02 is ON.

2) Generate a gain voltage/current (in accordance with the analog operation range to be selected, see

table below) using the selected generator or analog output.

3) Adjust the A/D GAIN potentiometer (‘pot’) until a digital value of 250 is read in D00.

Note 1: Turn the ‘pot’ clockwise and the digital value will increase. The ‘pot’ requires 18 revolutions to

move between the minimum and maximum settings.

Note 2: When necessary to maximize the 8 bit resolution, the digital value used in the gain adjustment

(detailed above) should be replaced with 255. This section has been written to demonstrate 250
full scale calibration.

Vol ta g e

input

Current

input

Vol ta g e
output

Current

output

Analog value when digital value is 0 0 t o 1V 0 to 4mA 0V 4mA

Analog value when digital value is 250 5 to 10V 20mA 5 to 10V 20mA

Analog input rang e 0-10V DC 0-5V DC 4-20mA DC

Offset calibration value 0.040V 0.020V 4.064mA

Analog input rang e 0-10V DC 0-5V DC 4-20mA DC

Gain calibration value 10.000V 5.000V 20.000mA

P O W E R

D /A

G A IN

A /D

O F F S E T

A /D

G A IN

D /A

O F F S E T

V I N 2

C O M 2

C O M 1

II N 1

I

IN 2

V

IN 1

V

+

+

P O W E R

D /A

G A I N

A /D

O F F S E T

A /D

G A I N

D /A

O F F S E T

VIN2

C O M 2

C O M 1

IIN1

I

IN

2

V

IN

1

C O M

V

V

O U T

I

O U T

+

P O W E R

A /D

O F F S E T

A

V I N 2

C O M 2

C O M 1

IIN1

I

IN 2

V

IN 1

+

P O W E R

D /A

G A I N

A /D

O F F S E T

A /D

G A I N

D /A

O F F S E T

A

VIN2

C O M 2

C O M 1I

IN

1

I

IN

2

V

IN

1

C O M

V

O U T

I

O U T

+

V o lt m e t e r

C u r r e n t g e n e r a to r

A /D G A I N
D /A O F F S E T
D /A G A I N

V o lt a g e g e n e r a to r

E x t e r n a l
v o l t a g e
i n p u t

I n t e g ra l
v o l t a g e
i n p u t

E x t e r n a l
c u r r e n t
i n p u t

I n t e g ra l
c u r r e n t
i n p u t

A m m e t e r

A /D O F F S E T

TO K0 K17 H00 K1

K0 K17 H02 K1

K0 K0 D0 K1

TO

X02

FROM

7.3 M ethod of Calibration(D/A)

Use the following program and the appropriate wiring configuration to calibrate the output channel of the
FX

0N

-3A

7.3.1 Output Calibration Program

7.3.2 Calibrating the Offset

1) Run the previously detailed program. Ensure X00 is ON and X01 is OFF.

2) Adjust the D/A OFFSET potentiometer (‘pot) until the selected meter displays the appropriate offset
voltage/current (in accordance with the analog operation range selected, see table below).

Note: Turn the ‘pot’ clockwise and the analog output signal will increase. The ‘pot’ requires 18 revolutions

to move between the minimum and maximum settings.

7.3.3 Calibrating the Gain

1) Run the previously detailed program. Ensure X00 is OFF and X01 is ON.

2) Adjust the D/A GAIN potentiometer (‘pot’) until selected meter displays the appropriate gain voltage/
current (in accordance with the analog operation range selected, see table below).

Note 1: Turn the ‘pot’ clockwise and the analog output signal will increase. The ‘pot’ requires 18

revolutions to move between the minimum and maximum settings

Note 2: When it is necessary to max imize the 8 bit resolution, the digital value used in the gain adjustment

(detailed above) should be replaced with 255. This section has been written to demonstrate a 250
full scale calibration.

8. Program example

8.1 Using Analog Inputs

The buffer memories (BFM) of the FX0N-3A are written TO or read FROM by the host PLC. The following
program reads the analog input from channel 1 of the FX

0N

-3A when M0 is ON, and the analog input data

of channel 2 when M1 is ON.

(H00) is written to BFM#17, selecting A/D input channel 1.
(H02) is written to BFM#17 starting t he A/D conversion process for
channel 1.
BFM#0 is read, storing the current value of channel 1 in register
D00
(H01) is written to BFM#17 now selecting A/D input channel 2.
(H03) is written to BFM#17 to re-start the A/D conversion process,
but for channel 2.
BFM#0 is read, storing the current value of channel 2 in register
D01.

The time T

AD

required to read an analog input channel is calculated as follows:

T

AD

= (TO instruction processing time) × 2 + (FROM instruction processing time)

Note : The 3 (TO/FROM) command format shown above should always be used when reading data from

the FX

0N

-3A’s analog input channels.

Analog output range 0-10V DC 0-5V DC 4-20 mA DC

Offset calibration meter value 0.040V 0.020V 4.064mA

Analog

outp

ut range

0-10V DC 0-5V DC 4-20mA DC

Gain calibration meter value 10.000V 5.000V 20.000mA

D/A

GAIN

A/D

GAIN

D/A

OFFSET

V

COM

V

OUT

I

OUT

+

D/A

GAIN

A/D

GAIN

D/A

OFFSET

A

COM

V

OUT

I

OUT

+

Voltage
output

Current
output

Voltmeter

Ammeter

TO K0 K16 K1 K1

K0 K17 H04 K1

K0 K17 H00 K1

TO

X00TOX01

TO K0 K16 K250 K1

K0 K17 H04 K1

K0 K17 H00 K1

TO

TO

X00 X01

TO K0 K17 H00 K1

K0 K17 H02 K1

FROM

K0 K0 D00 K1

TO

TO K0 K17 H01 K1

K0 K17 H03 K1

FROM

K0 K0 D01 K1

TO

M0

M1

8.2 Using Analog Outputs

The buffer memories (BFM) of the FX0N-3A are written TO, or read FROM by the host PLC. In the
following program, when M0 is turned ON the D/A conversion process is executed and an analog signal
equivalent to the digital value stored in this example, is output to register D02

The contents of D2 are written to BFM#16. This will be converted to
an analog output.
(H04) is written to BFM#17 to start the D/A conversion process.

The time T

AD

required to write an analog input channel is calculated as follows:

T

AD

= (TO instruction processing time) × 3

Note : The 3 (TO) instruction format shown above should always be used when writing data to the

FX

0N

-3A’s analog output channel.

Details on both the FROM and TO instructions (functions 78 and 79 respectively) can be found in the
“FX series Programming Manual (ΙΙ)”

8.3 Using FX1N, FX2N (V3.00 or more) or FX

2NC

(V3.00 or more) Series PLC’s

Please use FNC 176 (RD3A) and FNC 177 (WR3A)
Refer to FX Series Programming Manual ΙΙ.

9. Error Checking

If the FX0N-3A special function block does not seem to operate normally, check the following items:

• Check the status of POWER LED.
Lit: The extension cable is properly connected.
Otherwise: Check the connection of the extension cable.

• Check the external wiring.

• Check whether the output load connected to the analog output terminal is within the following
specified limits.
Voltage output: 1kΩ to 1MΩ, Current output: 500Ω or less

• Check whether the impedance of the input device is within the specified limits.
Voltage input: 200kΩ, Current input: 250Ω.

• Check the calibration of the FX

0N

-3A’s analog channels (input and output) using a voltmeter/ ammeter

as required. See previous two sections for a detailed explanation.

TO K0 K16 D02 K1

K0 K17 H04 K1

K0 K17 H00 K1

TO

M0

TO

Guidelines for the safety of the user and protection of the FX0N-3A Special
function block

• This manual has been written to be used by trained and competent personnel. This is defined

by the European directives for machinery and EMC.

• If in doubt at any stage during the installation of the FX

0N

-3A always consult a professional
electrical engineer who is qualified and trained to the local and national standards. If in doubt
about the operation or use of the FX

0N

-3A please consult the nearest Mitsubishi Electric

distributor.

• Under no circumstances will Mitsubishi E lectric be liable or 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 onl y 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.

• Owing to the very great variety in possible application of this equipment, you must satisfy
yourself as to its suitability for your specific application.

Manual number : JY992D49001

Manual revision : F

Date : April 20 15

JY992D49001F

Effective April 2015
Specifications are subject to
change without notice