Mitsubishi Electronics FX2N-5A User Manual

USER’S MANUAL

FX2N-5A Special function block

Foreword

• This manual contains text, diagrams and explanations which will guide the reader in the correct installation and operation of the FX install or use the unit.

-5A Special function block. It should be read and understood before attempting to

• Further information can be found in the FX

/FX1N/FX2N/FX

/FX3U/FX

2NC

Series Hardware Manual for

3UC

connecting main unit, and the FX Series Programming Manual(ΙΙ).

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

-5A Special function block always consult a professional

electrical engineer who is qualified and trained to the local and national standards that applies to the installation site.

• If in doubt about the operation or use of FX

-5A Special function block please consult the nearest Mitsubishi

Electric distributor.

• This manual is subject to change without notice.

FX2N-5A Special function block

-5A Special function block

USER’S MANUAL

Manual number : JY997D11401

Manual revision : D

Date : September 2008

This manual confers no industrial property rights or any rights of any other kind, nor does it confer any patent licenses. Mitsubishi Electric Corporation cannot be held responsible for any problems involving industrial property rights which may occur as a result of using the contents noted in this manual.

FX2N-5A Special function block

Guidelines for the Safety of the User and Protection of the FX2N-5A Special function block.

This manual provides information for the use of the FX2N-5A Special function block. The manual has been written to be used by trained and competent personnel. The definition of such a person or persons is as follows:

a) Any engineer who is responsible for the planning, design and construction of automatic

equipment using the product associated with this manual, should be of a competent nature, trained and qualified to the local and national standards required to fulfill that role. These engineers should be fully aware of all aspects of safety with regards to automated equipment.

b) Any commissioning or service engineer must be of a competent nature, trained and

qualified to the local and national standards required to fulfill that job. These engineers should also be trained in the use and maintenance of the completed product. This includes being completely familiar with all associated documentation for said product. All maintenance should be carried out in accordance with established safety practices.

c) All operators of the completed equipment (see Note) should be trained to use this

product in a safe manner in compliance to established safety practices. The operators should also be familiar with documentation which is associated with the actual operation of the completed equipment.

Note :

The term ‘completed equipment’ refers to a third party constructed device which contains or uses the product associated with this manual.

iii

FX2N-5A Special function block

Notes on the Symbols Used in this Manual

At various times throughout this manual certain symbols will be used to highlight points which are intended to ensure the users personal safety and protect the integrity of equipment. Whenever any of the following symbols are encountered its associated note must be read and understood. Each of the symbols used will now be listed with a brief description of its meaning.

Hardware Warnings

1) Indicates that the identified danger

2) Indicates that the identified danger could damage.

3) Indicates a point of further interest or further explanation.

Software Warnings

4) Indicates special care must be taken when using this element of software.

5) Indicates a special point which the user of the associate software element should be aware.

6) Indicates a point of interest or further explanation.

WILL

cause physical and property damage.

POSSIBLY

cause physical and property

FX2N-5A Special function block

• Under no circumstances will Mitsubishi Electric be liable 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.

• Please contact a Mitsubishi Electric distributor for more information concerning applications in life critical situations or high reliability.

FX2N-5A Special function block

Note Concerning the CE Marking

This document does not guarantee that a mechanical system including this product will comply with the following standards. Compliance to EMC standards of the entire mechanical system should be checked by the user / manufacturer. Compliance to LVD standards of the entire mechanical system should be checked by the user / manufacturer.

FX2N-5A Special function block

EMC

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 (89/336/EEC) when used as directed by the appropriate documentation. Refer to a manual or related material of each product other than the following.

Type : Programmable Controller (Open Type Equipment)

Models : FX

-5A manufactured

from November 1st, 2003 to April 30th, 2006 are

compliant with EN50081-2 and EN61131-2:1994+A11:1996+A12:2000 after May 1st, 2006 are compliant with EN61131-2:2003

Standard Remark

EN50081-2:1993 Electromagnetic compatibility

- Generic emission standard Industrial environment

EN61131-2:1994 Programmable controllers

/A11:1996 - Equipment requirements /A12:2000 and tests

EN61131-2:2003 Programmable controllers

- Equipment requirements and tests

Compliance with all relevant aspects of the standard. (Radiated Emissions and Mains Terminal Voltage Emissions)

Compliance with all relevant aspects of the standard. (RF Immunity, Fast Transients , ESD and Damped oscillatory wave)

Compliance with all relevant aspects of the standard. (Radiated Emissions, Mains Terminal Voltage Emissions, RF immunity, Fast Transients, ESD, Surge, Voltage drops and interruptions, Conducted and Power magnetic fields)

F o r m o r e d e t a i l s , p l e a s e c o n t a c t t h e l o c a l M i t s u b i s h i E l e c t r i c s a l e s s i t e .

vii

FX2N-5A Special function block

viii

FX2N-5A Special function block Contents.

Guideline............................................................................................................................iii

1. Introduction .........................................................................................1-1

2. External Dimensions and Parts...........................................................2-1

3. Installation ...........................................................................................3-1

4. Connection to PLC ..............................................................................4-1

5. Wiring ..................................................................................................5-1

5.1 Caution.............................................................................................................5-1

5.2 Input Wiring......................................................................................................5-2

5.3 Output Wiring...................................................................................................5-3

6. Specifications ......................................................................................6-1

7. Buffer Memory (BFM).........................................................................7-1

7.1 Buffer Memories (BFM) lists ............................................................................ 7-2

7.2 Details of buffer memories............................................................................. 7-12

7.2.1 BFM 0 input mode specification (READ/WRITE) .............................................. 7-12

7.2.2 BFM 1 output mode specification (READ/WRITE) ............................................ 7-14

7.2.3 BFM 2 to BFM 5 Number of averaging times (READ/WRITE) .......................... 7-16

7.2.4 BFM 6 to BFM 9 Averaged Input Channel data (READ only) ........................... 7-17

7.2.5 BFM 10 to BFM 13 Immediate Input Channel data (READ only) ...................... 7-17

7.2.6 BFM 14 Analog Output data (READ/WRITE).................................................... 7-17

7.2.7 BFM 15 Calculated Analog output data (when direct control function is active)

(READ only) ......................................................................................................7-17

7.2.8 BFM 16 to BFM 17 Reserved............................................................................ 7-17

7.2.9 BFM 18 hold/ reset analog output when PLC is stopped (READ/WRITE) ........ 7-18

7.2.10 BFM 19 setting change enable/disable (READ/WRITE) ................................... 7-19

7.2.11 BFM 20 Initialization function (reset all values to default) (READ/WRITE) ....... 7-20

FX2N-5A Special function block Contents.

7.2.12 BFM 21 Writes I/O characteristics (offset/gain Scaling function setting)

(READ/WRITE) .................................................................................................7-21

7.2.13 BFM 22 Convenient functions setting (READ/WRITE)...................................... 7-22

7.2.14 BFM 23 Set parameter for direct control between the input channel and output

channel (READ/WRITE)....................................................................................7-23

7.2.15 BFM 24 Reserved .............................................................................................7-24

7.2.16 BFM 25 Filter-level selection register (READ/WRITE) ...................................... 7-25

7.2.17 BFM 26 Upper/lower limit value alarm status (READ only)............................... 7-28

7.2.18 BFM 27 A/D data sudden change detection status (READ only) ...................... 7-30

7.2.19 BFM 28 Scale over status (READ/WRITE) .......................................................7-32

7.2.20 BFM 29 Error status ..........................................................................................7-34

7.2.21 BFM 30 Model ID code (READ only)................................................................. 7-37

7.2.22 BFM 31 to BFM 40 reserved .............................................................................7-37

7.2.23 BFM 41 to BFM 44 Analog input Offset data (READ/WRITE)........................... 7-37

7.2.24 BFM 45 Analog output Offset data (READ/WRITE) ..........................................7-37

7.2.25 BFM 51 to BFM 54 Analog Input Gain data (READ/WRITE) ............................7-38

7.2.26 BFM 55 Analog output Gain data (READ/WRITE) ............................................7-40

7.2.27 BFM 71 to BFM 74 Lower limit, alarm set value (READ/WRITE)...................... 7-41

7.2.28 BFM 81 to BFM 84 Upper limit, alarm set value (READ/WRITE)......................7-41

7.2.29 BFM 91 to BFM 94 Sudden change detection set value (READ/WRITE) ......... 7-43

7.2.30 BFM 99: Clears upper/lower limit value error and sudden change detection error

(READ/WRITE) .................................................................................................7-44

7.2.31 BFM 101 to BFM 108 Peak value (minimum value) (READ only).....................7-45

7.2.32 BFM 111 to BFM 118 Peak value (maximum value) (READ only)....................7-45

7.2.33 BFM 109: Peak value reset flag (minimum value) (READ/WRITE)................... 7-46

7.2.34 BFM 119: Peak value reset flag (maximum value) (READ/WRITE).................. 7-46

7.2.35 BFM 200 to BFM 249 Scaling function (READ/WRITE).................................... 7-47

FX2N-5A Special function block Contents.

8. Adjustment of I/O Characteristics........................................................8-1

8.1 Standard I/O characteristics............................................................................. 8-1

8.2 Adjustment of I/O characteristics ..................................................................... 8-8

9. Example program................................................................................9-1

9.1 Program example for analog input/output........................................................ 9-1

9.2 Outline of FROM/TO commands ..................................................................... 9-4

Associated Manuals List........................................................................... A-1

FX2N-5A Special function block Contents.

xii

FX2N-5A Special function block

1. Introduction

The FX2N-5A analog special function block has four input channels and one output channel. The input channels receive analog signals and converts them to the comparable digital values. The output channel takes a digital value and outputs an equivalent analog signal.

1) Analog signal inputs can be selected from either voltage or current input. The applicable analog signal input is set using the TO instruction supplied by the PLC main unit. This PLC instruction is used to select different analog input signal types for each corresponding channel.

Introduction 1

2) The FX

-5A can be connect to FX0N/FX1N/FX2N/FX

3) Up to 2 FX

-5A units can be connected to FX0N main unit, FX0N extension unit, FX1N Main

2NC

/FX3U/FX

unit. Up to 8 FX

Up to 4 FX

-5A units can be connected to FX2N/FX3U/FX

-5A units can be connected to one FX For connection to the FX For connection to the FX

2NC

Series PLC, an FX

3UC

Series PLC, an FX

2NC

Series PLC.

2NC

-CNV-IF is required.

2NC

-CNV-IF or FX

3UC

Series PLC.

Data transfer with the PLC is performed via buffer memories of the FX TO Instructions.

*1 Up to 7 units can be connected to an FX

3UC

-32MT-LT PLC.

3UC

series PLC

3UC

-1PS-5V is required.

-5A using FROM/

1-1

FX2N-5A Special function block Introduction 1

MEMO

1-2

FX2N-5A Special function block

2. External Dimensions and Parts

External Dimensions and Parts 2

Dimensions: mm(inches)

10)

9(0.35")

87(3.43")

4(0.16")

80(3.15")

90(3.54")

4(0.16")

55(2.17")

FX -5A

POWER

24V

AD/DA

55(2.17")

Terminal arrangement

24+

OUT

IN1

IN2

IN4IN3

VI-

V+

I+

VI-

V+

I+

VI-

24-

V+

I+

VI-

V+

I+

VI-

V+

I+

Mass (Weight): 0.3kg (0.66lbs)

OUT

IN1

IN2

IN4IN3

24+

VI-

V+

I+

VI-

V+

I+

VI-

24-

V+

I+

VI-

V+

I+

VI-

V+

I+

2-1

FX2N-5A Special function block External Dimensions and Parts 2

1) Direct mounting hole (2-φ4.5) (0.18)

2) Extension cable

3) Power indicator lamp (LED) 5V power is supplied from the programmable controller to light this indicator lamp.

4) Power supply terminals (Screw terminal: M3 (0.12))

5) Analog output terminals (Screw terminal: M3 (0.12))

6) Analog input terminals (Screw terminal: M3 (0.12))

7) 24V power indicator lamp (LED) 24V DC power is supplied to the terminals of the FX to light this indicator lamp.

8) AD/DA conversion indicator lamp (LED) Flashes at a high speed if AD/DA conversion is performing without a problem.

9) DIN rail mounting clip

10)DIN rail mounting slot (width of DIN rail: 35mm 1.38")

-5A

2-2

FX2N-5A Special function block

3. Installation

Install the FX2N-5A to the right side of a main unit, extension unit, extension block or special

Installation 3

block of the FX The FX

-5A can be installed with DIN rail (DIN46277 of 35 mm in width) or directly installed

/FX1N/FX2N/FX

2NC

/FX3U/FX

3UC

Series PLC.

with screws M4. For the details, refer to the handy manual supplied together with the PLC main unit.)

3-1

FX2N-5A Special function block Installation 3

Figure 3.1: Installation with DIN rail

POWER

FX -5A

24V

AD/DA

Hook for DIN rail

Figure 3.2: Direct installation

Installation screw M4

•The FX

-5A can be installed on DIN rail (DIN46277) of 35 mm in width as it is. For removal, pull down on the DIN rail mounting hook, then remove the FX

•The FX

-5A can be installed directly by

-5A.

inserting screws (M4) into installation holes. For the pitch and the position of installation holes, refer to the figure on the left.

51(2.01)

Dimensions: mm(inch)

80(3.15)

3-2

FX2N-5A Special function block

4. Connection to PLC

Connect the FX2N-5A to the right side of a main unit, extension unit or extension block of FX0N/

Connection to PLC 4

/FX2N/FX

For connection to a basic unit or extension block of the FX

2NC

/FX3U/FX

3UC

Series PLC with an extension cable.

2NC

Series PLC, use an FX

2NC

-CNVIF. For connection to a basic unit or extension block of the FX

3UC

IF or FX

-1PS-5V.

3UC

Series PLC, use an FX

Please check the power supply availability to determine the number of FX be connected to the FX

/FX1N/FX2N/FX

2NC

/FX3U/FX

3UC

PLCs.

-5A blocks that can

2NC

-CNV-

A unit No. 0 to 7 is automatically assigned to each special unit or special block connected to a PLC basic unit from the one nearest to the basic unit.

The data is read from and written to the FX2N-5A by FROM/TO instructions supplied by the main unit.

*1 Because the unit No.0 is assigned to the built-in CC-Link/LT master in the FX

3UC

-32MT-LT,

unit numbers assigned to special extension units/blocks begins with No.1.

4-1

FX2N-5A Special function block Connection to PLC 4

MEMO

4-2

FX2N-5A Special function block

5. Wiring

5.1 Caution

1) Do not lay signal cabling near to high voltage power cabling or house them in the same

trunking duct. Effects of noise or surge induction may occur. Keep signal cables at safe distance of more than 100 mm (3.94") from these power cables.

Wiring 5

2) The terminal screws of the FX

-5A are M3 (0.12"), therefore crimp style terminals (see

drawing) suitable for use with these screws should be fitted to the cable for wiring.

Figure 5.1: Crimp Terminals

For M3 (0.12")

6.2 mm (0.24" ) or less

3) The terminal tightening torque is 0.5 to 0.8 N

6.2 mm (0.24") or less

m. Tighten securely to avoid malfunction.

For M3 (0.12")

4) Cut off all phases of power source before installation or performing wiring work in order to avoid electric shock or product damage.

5) Remount the provided terminal cover before supplying power and operating the unit after installation or wiring work in order to avoid electric shock.

5-1

FX2N-5A Special function block Wiring 5

5.2 Input Wiring

Figure 5.2: Input Wiring

24V DC

*4 Connected to " " terminal of PLC main unit

Class D

grounding

Voltage input

Current input

*1 Shielded cable

IN1

IN2

IN4

24+

24-

V+

I+

VI-

V+

I+

VI-

V+

I+

VI-

FX2N-5A

250

Ω

250

Ω

250

DC/DC

converter

4.7k

Ω

200k

4.7k

200k

4.7k

200k

Ω

+15V

-15V

CH1

CH2

CH4

*1 Use a two-core, shielded twisted pair

for the analog input line, and separate it from other power lines or a lines easily induced.

*2 If there is voltage ripple in the input

signal or there is noise in the external wiring, connect a bipolar capacitor of approximately 0.1 to 0.47 µF, 25 V.

*3 For the current input, short-circuit the

“V+” terminal and the “I+” terminal.

*4 Make sure to connect the terminal

to the terminal of the PLC basic unit to which Class D grounding (100

Ω

or less) is performed.

*5 The 24 V DC service power supply of

the PLC is also available.

- For the terminal arrangement, refer to Section 2.

5-2

FX2N-5A Special function block Wiring 5

5.3 Output Wiring

Please refer to 5.2 for the wiring for "24+", "24-" terminals.

Figure 5.3: Output Wiring

-5A

Voltage output

Inverter,

etc.

*1 Shielded cable

OUT

V+

I+

VI-

*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 (grounding: 100Ω or less).

*3 If electrical noise or a voltage ripple exists at

Current output

Recorder,

etc.

*1 Shielded cable

Figure 5.4: Crimp Terminals

6.2 mm (0.24" ) or less

OUT

N.C.

V+

I+

VI-

For M3 (0.12")

-5A

the output, connect a smoothing capacitor of

0.1 to 0.47µF, 2 5 V.

- Shorting the voltage output terminal or connecting the current output load to the voltage output terminal may damage the

-5A.

- For the terminal arrangement, refer to Section

For M3 (0.12")

6.2 mm (0.24") or less

5-3

FX2N-5A Special function block Wiring 5

MEMO

5-4

FX2N-5A Special function block

6. Specifications

Table 6.1: General specifications

Item Specifications

Specifications 6

Ambient

0 to +55 °C during operation, -20 to +70 °C during storage

temperature range

Ambient humidity 35 to 85 % RH during operation (Dew condensation shall not be allowed.)

Frequency 10 to 57 Hz, half amplitude 0.075 mm, 57 to 150 Hz, acceleration 9.8

m/s

, 10 times in each of X, Y and Z directions (80 min. in each direction)

Vibration resistance

(For product installed with DIN rail: Frequency 10 to 57 Hz, half amplitude 0.035

)

Impact resistance

mm, 57 to 150 Hz, acceleration 4.9 m/s

147 m/s

for 11 ms, 3 times in each of X, Y and Z directions with half-sine pulses

By noise simulator of noise voltage 1,000 Vp-p, noise width 1 µs and frequency

Noise resistance

30 to 100 Hz

500 V AC for 1 min

Withstand voltage

(between analog input terminal and each terminal of PLC main unit)

Insulation resistance 5 MΩ or more by 500 V DC Megger (between all terminals as a whole and earth)

Operating

Corrosive gas and much dusts shall not be detected.

atmosphere

Working altitude

<2000m

*1 If the pressure is higher than the atmospheric pressure, do not use FX2N-8AD.

Malfunctions may occur.

6-1

FX2N-5A Special function block Specifications 6

Table 6.2: Power supply specifications

Item Specifications

Interface driving

24 V DC±10%, 90 mA (maximum), externally supplied

power supply

CPU driving power

5 V DC, 70 mA, supplied via extension cable from PLC main unit

supply

Table 6.3: Performance specifications

Item Specifications

Channel for voltage/current input: 1 ms x Number of used channels

Conversion speed

Insulation method

Number of occupied I/O points

Applicable PLC

Channel for voltage/current output: 2 ms (See BFM 25)

Photocoupler insulates the analog input/output area from PLC. DC/DC converter insulates the power supply from analog I/O. Channels are not insulated against each other.

8 points (including input and output points)

, FX1N, FX2N, FX

For connection to the FX For connection to the FX required.

, FX3U, FX

2NC

3UC

Series PLC

3UC

Series PLC, an FX Series PLC, an FX

-CNV-IF is required.

2NC

-CNV-IF or FX

2NC

-1PS-5V is

3UC

Built-in memory EEPROM

6-2

FX2N-5A Special function block Specifications 6

Table 6.4: Voltage/current input specifications

Item Voltage input Current input

-10 to +10 V DC (input resistance: 200 kΩ) Adjustment is enabled with the

Analog input range

following conditions: Offset value: -32000 to +5000 mV Gain value: -5000 to +32000 mV "Gain - Offset":

-100 to +100mV DC (input resistance: 200kΩ) Adjustment is enabled with the following conditions: Offset value: -320000 to +50000µV Gain value: -50000 to +320000µV "Gain - Offset": (Resolution is constant.) Change is disabled while the Voltmeter display mode is used. Maximum absolute input: ±15 V

1000 mV

10000 µV

-20 to +20 mA DC, +4 to +20 mA DC (input resistance: 250 Ω) Adjustment is enabled with the following conditions: Offset value: -32000 to +10000 µA Gain value: -10000 to +32000 µA "Gain - Offset": (Resolution is constant.) Change is disabled while the Amperemeter display mode is used. Maximum absolute input: ±30 mA

1000 µA

Digital output

Signed 16-bit binary (-10 to +10V at input)

Signed 15-bit binary

Signed 12-bit binary (-100 to +100mV at input)

6-3

FX2N-5A Special function block Specifications 6

Table 6.4: Voltage/current input specifications

Item Voltage input Current input

• 10 µA (40 mA × 1/4000)

-20 to +20 mA at input

• 312.5 µV (20 V × 1/64000)

-10 to +10V at input

Resolution

• 50µV (200 mV × 1/4000)

-100 to +100mV at input

• 1.25 µA (40 mA × 1/32000)

-20 to +20 mA at input

• 10 µA (40 mA × 1/4000) +4 to +20 mA at input

• 1.25 µA (40 mA × 1/32000) +4 to +20 mA at input

Total accuracy

Ambient temperature: 25 °C ± 5 °C

-10 to +10V DC :

-20 to +20mA DC :

±0.3% (±60 mV) against full scale 20V

±0.5% (±200 µA) against full scale 40

-100 to +100mV DC : mA

±0.5% (±100 mV) against full scale 20V

+4 to +20mA input is same (±200 µA)

Ambient temperature: 0 to +55 °C

-10 to +10V DC :

-20 to +20mA DC :

±0.5% (±100 mV) against full scale

±1.0% (±400 µA) against full scale

20V

40 mA

-100 to +100mV DC : +4 to +20mA input is same (±400 µA)

±1.0% (±200 mV) against full scale 20V

6-4

FX2N-5A Special function block Specifications 6

Table 6.5: Voltage/current output specifications

Item Voltage output Current output

-10 to +10 V DC (External load resistance:5 kΩ to 1MΩ) Adjustment is enabled with the following conditions:

Analog output range

Digital input Signed 12-bit binary 10-bit binary

Resolution

Total accuracy

Offset value: -10000 to +5000 mV Gain value: -9000 to +5000 mV

"Gain - Offset": (Resolution is constant.) Change is disabled while absolute voltage output mode is used.

5mV (10 V × 1/4000)

-10 to +10V at output

Ambient temperature: 25 °C ± 5 °C ±0.5%(±100mV) against full scale 20V Ambient temperature: 0 to +55 °C ±1.0%(±200mV) against full scale 20V

1000 mV

0 to 20 mA DC, 4 to 20 mA DC (External load resistance:500Ω or less) Adjustment is enabled with the following conditions: Offset value: 0 to +10000 µA Gain value: 3000 to +30000 µA

(Resolution is constant.) Change is disabled while absolute current output mode is used.

20 µA (20 mA × 1/1000) 0 to 20 mA at output 4 to 20mA at output

Ambient temperature: 25 °C ± 5 °C ±0.5% (0 to 20mA at output ±200 µA) against full scale 40 mA 4 to 20mA output is same (±200 µA) Ambient temperature: 0 to +55 °C ±1.0% (0 to 20mA at output ±400 µA) against full scale 40 mA 4 to 20mA output is same (±400 µA)

"Gain - Offset":

3000 µA

6-5

FX2N-5A Special function block Specifications 6

MEMO

6-6

FX2N-5A Special function block

7. Buffer Memory (BFM)

Caution

1) Do not access the “Reserved” buffer memories “Reserved” (BFM #16, #17, #24, #31 to #40, #46 to #50, #56 to #70, #75 to #80, #85 to #90, #95 to #98, #100, #110, #120 to #199) using FROM/TO instructions. Accessing the reserved buffer memories may cause

Buffer Memory (BFM) 7

abnormal behavior in the FX

Data transfer between the FX memories (hereafter referred to as "BFM") of the FX

-5A module.

-5A and the PLC main unit is performed through buffer

-5A. Each BFM consists of 1 word, 16 bits. The BFM No. 0 to 249 and a function are assigned to each BFM. Use FROM/TO instructions to read and write the data between the BFM and the PLC. When the power is turned on, the initial value is written to each BFM. When you would like to use different contents of the BFM, create a program for the PLC so that the desired contents are written to the BFM every time the power of the PLC is turned on. (The contents stored in BFM #0, #1, #18, #19, #22, #25, #41 to #45, #51 to #55, #71 to #74, #81 to #84, #200 to #249 are stored in the built-in EEPROM, and held against power failure.)

7-1

FX2N-5A Special function block Buffer Memory (BFM) 7

7.1 Buffer Memories (BFM) lists

Table 7.1: BFM Lists

BFM

No.

#0 Specifies input mode of CH1 to CH4.

#1 Specifies output mode of CH1.

#2 Number of averaging times for CH1 Setting range: 1 to 256 times

#3 Number of averaging times for CH2 Setting range: 1 to 256 times

#4 Number of averaging times for CH3 Setting range: 1 to 256 times

#5 Number of averaging times for CH4 Setting range: 1 to 256 times

#6 CH1 Data (average data)

#7 CH2 Data (average data)

#8 CH3 Data (average data)

#9 CH4 Data (average data)

#10 CH1 data (immediate data)

#11 CH2 data (immediate data)

Description

Hold against

power failure

{

⎯ ⎯ ⎯ ⎯ ⎯⎯ ⎯⎯ ⎯⎯ ⎯⎯ ⎯⎯ ⎯⎯

Initial value

H0000 at shipment

#12 CH3 data (immediate data)

#13 CH4 data (immediate data)

#14 CH1 output data

#15

#16 Reserved

#17 Reserved

Calculated Analog output data if direct output control function is active (= BFM 14 + effective direct output value)

⎯⎯ ⎯⎯ ⎯⎯

⎯⎯

⎯⎯ ⎯⎯

7-2

FX2N-5A Special function block Buffer Memory (BFM) 7

Table 7.1: BFM Lists

BFM

No.

#18 Hold last value / reset output to offset value when PLC is stopped

Disables setting change of I/O characteristics and convenient functions. The following BFMs are protected: BFM 0 (input channel mode settings) BFM 1 (output channel mode settings) BFM 18 (hold/reset last value output) BFM 20 (reset all values to default)

#19

#20

BFM 21 (offset/gain adjustment settings) BFM 22 (convenient function settings) BFM 25 (digital filter selection) BFM 41 to 45 (offset data settings) BFM 51 to 55 (gain data settings) BFM 200 to 249 (Scaling function settings) Disables change.: K2, Enables change.: K1

Initialize function. (Initialize function at K1, then returns automatically to K0 after initialization is completed.)

Description

Hold against

power failure

{

⎯

Initial value

K1 at shipment

#21

#22

#23 Set parameter for direct control function between input and output

#24 Reserved

Writes I/O characteristics. (Returns automatically to K0 after write of offset/gain value or Scaling function value is finished.)

Sets convenient functions (upper/lower limit value detection, immediate data and average data peak value hold, switch off function for range over error for each channel).

⎯

{

⎯ ⎯⎯

K0 at shipment

H0000

7-3

FX2N-5A Special function block Buffer Memory (BFM) 7

Table 7.1: BFM Lists

BFM

No.

#25 Filter mode selection register

#26 Upper/lower limit value alarm status (valid while BFM #22 b0 or b1 is ON)

#27

#28 Scale over status and disconnection detection

#29 Error status

#30 Model code (K1010)

#31 Reserved

#32 Reserved

#33 Reserved

#41 CH1 offset data (mV, 10µV or µA)

A/D data sudden change detection status (valid while BFM #91 to #94 are different to 0)

•

Reserved

•

Description

Hold against

power failure

{

⎯

⎯ ⎯ ⎯ ⎯⎯ ⎯⎯ ⎯⎯

⎯⎯

{

Initial value

K1010

K0 at shipment

#42 CH2 offset data (mV, 10µV or µA)

#43 CH3 offset data (mV, 10µV or µA)

#44 CH4 offset data (mV, 10µV or µA)

#45 Output CH1 offset data (mV or µA)

#46 Reserved

#47 Reserved

#48 Reserved

{

⎯⎯ ⎯⎯ ⎯⎯

K0 at shipment

7-4

FX2N-5A Special function block Buffer Memory (BFM) 7

Table 7.1: BFM Lists

BFM

No.

•

Reserved

•

#51 CH1 gain data (mV, 10µV or µA)

#52 CH2 gain data (mV, 10µV or µA)

#53 CH3 gain data (mV, 10µV or µA)

#54 CH4 gain data (mV, 10µV or µA)

#55 Output CH1 gain data (mV or µA)

#56 Reserved

#57 Reserved

#58 Reserved

#59 #60

#61 Reserved

Reserved

Description

Hold against

power failure

⎯⎯

{

⎯⎯ ⎯⎯ ⎯⎯

⎯⎯

Initial value

K5000 at shipment

#62 Reserved

#63 Reserved

#64 Reserved

#65 Reserved

#66 Reserved

#67 Reserved

#68 Reserved

⎯⎯ ⎯⎯ ⎯⎯ ⎯⎯ ⎯⎯ ⎯⎯ ⎯⎯

7-5

FX2N-5A Special function block Buffer Memory (BFM) 7

Table 7.1: BFM Lists

BFM

No.

•

Reserved

•

#71

#72

#73

#74

#75 Reserved

#76 Reserved

#77 Reserved

#78 Reserved

CH1 lower limit value alarm set value (valid while BFM #22 b0 or b1 is ON)

CH2 lower limit value alarm set value (valid while BFM #22 b0 or b1 is ON)

CH3 lower limit value alarm set value (valid while BFM #22 b0 or b1 is ON)

CH4 lower limit value alarm set value (valid while BFM #22 b0 or b1 is ON)

Description

Hold against

power failure

⎯⎯

{

⎯ ⎯ ⎯ ⎯ ⎯ ⎯ ⎯ ⎯

Initial value

K-32000

•

#81

#82

#83

Reserved

CH1 upper limit value alarm set value (valid while BFM #22 b0 or b1 is ON)

CH2 upper limit value alarm set value (valid while BFM #22 b0 or b1 is ON)

CH3 upper limit value alarm set value (valid while BFM #22 b0 or b1 is ON)

⎯⎯

{

K32000

7-6

FX2N-5A Special function block Buffer Memory (BFM) 7

Table 7.1: BFM Lists

BFM

No.

#84

#85 Reserved

#86 Reserved

#87 Reserved

#88 Reserved

#91

#92

#93

CH4 upper limit value alarm set value (valid while BFM #22 b0 or b1 is ON)

•

Reserved

•

CH1 sudden change detection set value Setting range: 0 to 32000 (0 means function is disabled)

CH2 sudden change detection set value Setting range: 0 to 32000 (0 means function is disabled)

CH3 sudden change detection set value Setting range: 0 to 32000 (0 means function is disabled)

Description

Hold against

power failure

{

⎯ ⎯ ⎯ ⎯ ⎯ ⎯ ⎯ ⎯

⎯⎯

⎯

Initial value

K32000

#94

#95 Reserved

#96 Reserved

#97 Reserved

#98 Reserved

CH4 sudden change detection set value Setting range: 0 to 32000 (0 means function is disabled)

⎯

⎯⎯ ⎯⎯ ⎯⎯ ⎯⎯

7-7

FX2N-5A Special function block Buffer Memory (BFM) 7

Table 7.1: BFM Lists

BFM

No.

#99

•

#101

#102

#103

#104

#105

Description

Clear upper and lower limit value alarm and sudden change detection alarm

Reserved

CH1 average data peak value (minimum value) (valid while BFM #22 b2 is ON)

CH2 average data peak value (minimum value) (valid while BFM #22 b2 is ON)

CH3 average data peak value (minimum value) (valid while BFM #22 b2 is ON)

CH4 average data peak value (minimum value) (valid while BFM #22 b2 is ON)

CH1 immediate data peak value (minimum value) (valid while BFM #22 b3 is ON)

Hold against

power failure

⎯

⎯⎯

Initial value

#106

#107

#108

#109 Peak value (minimum value) reset flags

#110 Reserved

CH2 immediate data peak value (minimum value) (valid while BFM #22 b3 is ON)

CH3 immediate data peak value (minimum value) (valid while BFM #22 b3 is ON)

CH4 immediate data peak value (minimum value) (valid while BFM #22 b3 is ON)

⎯⎯

⎯ ⎯⎯

7-8

FX2N-5A Special function block Buffer Memory (BFM) 7

Table 7.1: BFM Lists

BFM

No.

#111

#112

#113

#114

#115

#116

#117

Description

CH1 average data peak value (maximum value) (valid while BFM #22 b2 is ON)

CH2 average data peak value (maximum value) (valid while BFM #22 b2 is ON)

CH3 average data peak value (maximum value) (valid while BFM #22 b2 is ON)

CH4 average data peak value (maximum value) (valid while BFM #22 b2 is ON)

CH1 immediate data peak value (maximum value) (valid while BFM #22 b3 is ON)

CH2 immediate data peak value (maximum value) (valid while BFM #22 b3 is ON)

CH3 immediate data peak value (maximum value) (valid while BFM #22 b3 is ON)

Hold against

power failure

⎯⎯

Initial value

#118

#119 Peak value (maximum value) reset flags

#198 Reserved

#199 Reserved

CH4 immediate data peak value (maximum value) (valid while BFM #22 b3 is ON)

•

Reserved

•

⎯⎯

⎯

⎯⎯

⎯⎯ ⎯⎯

7-9

FX2N-5A Special function block Buffer Memory (BFM) 7

Table 7.1: BFM Lists

BFM

No.

#200

#201

#202

#203

•

#208

#209

CH1 Scaling function

Analog Value 1

CH1 Scaling function

Digital Value 1

CH1 Scaling function

Analog Value 2

CH1 Scaling function

Digital Value 2

CH1 Scaling function

Analog Value 5

CH1 Scaling function

Digital Value 5

Description

This function defines a Scaling input curve (similar to a look up table) for each channel.

Hold against

power failure

{

Initial value

K-10200

K-32640

K10200

K32640

#210

#211

•

#218

CH2 Scaling function

Analog Value 1

CH2 Scaling function

Digital Value 1

CH2 Scaling function

Analog Value 5

{

K-10200

K-32640

7-10

FX2N-5A Special function block Buffer Memory (BFM) 7

Table 7.1: BFM Lists

BFM

No.

#219

•

#238

#239

#240

#241

#242

CH2 Scaling function

Digital Value 5

CH4 Scaling function

Analog Value 5

CH4 Scaling function

Digital Value 5

Output CH1 Scaling function Digital output Value 1

Output CH1 Scaling function Analog output Value 1

Output CH1 Scaling function Digital output Value 2

Description

This function defines a Scaling input curve (similar to a look up table) for each channel.

Hold against

power failure

{

Initial value

K-32640

K-10200

K32640

#243

•

#248

#249

Output CH1 Scaling function Analog output Value 2

Output CH1 Scaling function Digital output Value 5

Output CH1 Scaling function Analog output Value 5

{

K10200

7-11

FX2N-5A Special function block Buffer Memory (BFM) 7

7.2 Details of buffer memories

7.2.1 BFM 0 input mode specification (READ/WRITE)

BFM 0 specifies the input mode of CH1 to CH4. The BFM consists of a 4-digit hexadecimal code, where one digit is assigned to each input channel. The range for each digit is a Hex value between 0 to F. The highest digit corresponds to input ch4, whereas the lowest digit corresponds to input ch1.

BFM#0

{{{{

CH1 CH2 CH3 CH4

The meaning of the digits is as follows:

0: Voltage input mode (-10 to +10 V) (Display range -32000 to +32000) 1: Current input mode (4 to 20 mA) (Display range 0 to +32000) if current is less than 2mA, a

range error alarm will be set in BFM 28 2: Current input mode (-20 to +20 mA) (Display range -32000 to +32000) 3: Voltage input mode (-100 to +100 mV) (Display range -32000 to +32000) 4: Voltage input mode (-100 to +100 mV) (Display range -2000 to +2000) 5: Voltmetor display mode (-10V to + 10V) (Display range -10000 to +10000) 6: Amperemeter display mode (4mA to +20mA) (Display range 2000 to +20000 = 2mA to

20mA) if current is less than 2mA, a range error alarm will be set in BFM 28 7: Amperemeter display mode (-20mA to +20mA) (Display range -20000 to +20000)

7-12

FX2N-5A Special function block Buffer Memory (BFM) 7

8: Voltmeter display mode (-100mV to + 100mV) (Display range -10000 to +10000) 9: Scaling function Voltage input mode (-10 to +10 V) (maximum Display range -32768 to

+32767); default = -32640 to +32640 A:Scaling function Current input mode (4 to +20 mA) (maximum Display range -32768 to

+32767); default = -32640 to +32640 B:Scaling function Voltage input mode (-100 to +100 mV) (maximum Display range -32768 to

+32767); default = -32640 to +32640 F: channel disabled, channel returns always 0. C to E: not valid; the module will automatically restore the last valid setting.

The input characteristics such as the offset and gain settings are automatically changed depending on the settings of BFM 0. A mode change in BFM 0 will also affect the settings of BFM 41 to 44 (offset data), BFM 51 to 54 (gain data), and BFM 200 to 239 (Scaling function data). Before changing offset/gain or Scaling function data, the appropriate input mode specification must be set in BFM 0, otherwise, the offset/gain or Scaling function data will be overwritten by the default data of the selected input mode. The scale over status (BFM 28) value present before the mode change will not automatically be cleared when performing a mode change. Disabling a channel will increase the scanning frequency of the other channels. The default value of BFM 0 is H0000. The value of BFM 0 is stored in the internal EEPROM (non-volatile). The module contains a safety function to protect the internal EEPROM from being destroyed when the same value is accidentally written continuously to BFM 0.

7-13

FX2N-5A Special function block Buffer Memory (BFM) 7

7.2.2 BFM 1 output mode specification (READ/WRITE)

BFM 1 specifies the output mode of the analog output CH1. The BFM consists of a 4-digit hexadecimal code, where only the lowest digit is assigned to the analog output channel. The range for the digit is a Hex value between 0 to A. The highest 3 digits are simply ignored by the module, whereas the lowest digit corresponds to output ch1.

BFM#1

{{{{

Specify of output mode

Invalid

The meaning of the digits is as follows:

0: Voltage output mode (-10 to +10 V) (output range -32000 to +32000) 1: Voltage output mode (-10 to +10 V) (output range -2000 to +2000) 2: Current output mode (4 to 20 mA) (output range 0 to 32000) 3: Current output mode (4 to 20 mA) (output range 0 to 1000) 4: Current output mode (0 to 20 mA) (output range 0 to 32000) 5: Current output mode (0 to 20 mA) (output range 0 to 1000) 6: Absolute Voltage output mode (-10 to +10 V) (output range -10000 to +10000) 7: Absolute Current output mode (4 to 20mA) (output range 4000 to 20000) 8: Absolute Current output mode (0 to 20mA) (output range 0 to 20000) 9: Scaling Voltage output mode (-10 to +10 V) (maximum output range -32768 to +32767) A: Scaling Current output mode (0 to 20 mA) (maximum output range 0 to 32767) B to F: not valid; the module will automatically restore the last valid setting.

7-14

FX2N-5A Special function block Buffer Memory (BFM) 7

The output characteristics such as the offset and gain settings are automatically changed depending on the settings of BFM 1. A mode change in BFM 1 will also affect the settings of BFM 45 (offset data), BFM 55 (gain data), and BFM 240 to 249 (Scaling function data). Before changing offset/gain or Scaling function data, the appropriate output mode specification must be set, otherwise, the offset/gain or Scaling function data will be overwritten by the default data of the selected output mode. The scale over status (BFM 28) value present before the mode change will not automatically be cleared when performing a mode change. The default value of BFM 1 is H0000. The value of BFM 1 is stored in the internal EEPROM (non-volatile). The module contains a safety function to protect the internal EEPROM from being destroyed when the same value is accidentally written continuously to BFM 1.

7-15

FX2N-5A Special function block Buffer Memory (BFM) 7

7.2.3 BFM 2 to BFM 5 Number of averaging times (READ/WRITE)

The number of averaging times of BFM 2 to BFM 5 specify the number of samples that is used to calculate the average values which are displayed in BFM 6 to BFM 9. The setting range of the number of averaging times is 1 to 256. When the number is set to K1, the immediate data (current values) are stored in BFM 6 to BFM

9. This data is the same as those data displayed in BFM 10 to BFM13. When the number of averaging times is set to K0, the value is automatically changed to K1. If the value is set to K257 or more it is also changed to K1 automatically. In either case, a number of averaging times setting error (BFM 29 b10) occurs. The initial value of BFM 2 to BFM 5 is K8.

Update of average data

The average data of (BFM 6 to BFM 9) are updated every time the A/D conversion processing is performed. BFM 6 to 9 will always contain the most recent average sum of the number of samples specified in BFM 2 to BFM5 divided by this number. For example the formula for BFM 6 is as follows: If the averaging process has just started or when the number of average samples has been changed during operation, the sampling values that have not been converted until that time are not considered for the calculation. In that case the number of samples used to calculate the average value is calculated based on the number of available samples at this time.

7-16

FX2N-5A Special function block Buffer Memory (BFM) 7

7.2.4 BFM 6 to BFM 9 Averaged Input Channel data (READ only)

The average A/D conversion data of each input channel is displayed in BFM 6 to BFM 9. The number of samples to calculate the average data is influenced by the setting in BFM 2 to BFM

5) described above. The data displayed is "processed data", therefore, offset and gain calculations and Scaling function calculations and digital filtering (if selected) are already performed before the average value is calculated.

7.2.5 BFM 10 to BFM 13 Immediate Input Channel data (READ only)

The immediate A/D conversion data of each channel is displayed BFM 10 to BFM 13. The data displayed "processed data", therefore, offset and gain calculations, Scaling function calculations and digital filtering (if selected) are already performed.

7.2.6 BFM 14 Analog Output data (READ/WRITE)

BFM 14 receives the analog output data for the DA (Digital Analog) converter. For this data, offset/gain calculations or the Scaling function calculation will be performed, and direct output function calculation. Thus, "processed" data will be sent to the DA converter.

7.2.7 BFM 15 Calculated Analog output data (when direct control function is active) (READ only)

If the direct output control function (see BFM 23) is enabled, the result of the calculation process that is written to the analog output is read back to the PLC via BFM 15.

7.2.8 BFM 16 to BFM 17 Reserved

7-17

FX2N-5A Special function block Buffer Memory (BFM) 7

7.2.9 BFM 18 hold/ reset analog output when PLC is stopped (READ/WRITE)

If BFM 18 is 0, while the PLC base unit is in Stop mode the value of BFM15 (value of BFM14 + direct output function) will be output. If the direct output function is active, the output value will be continuously updated, when the input channel values are changing. If BFM18 is set to K1, and there is no TO instruction access for more than 200 ms from the main unit to the FX

-5A, consequently, the output will be stopped. In this case the last value of BFM 15 (value of BFM14 + direct output function) will be output. If BFM18 is set to K2, and there is no TO instruction access for more than 200 ms from the main unit to the FX

-5A, consequently, the output will be reset to the defined offset value.

If BFM18 is set to K1 or K2, a FROM/TO-Watchdog-Timer will be activated. If there is no FROM/TO access for longer than 200ms, the action described above will be taken. (FROM/TO Watchdog timer has barked, bit 8 of BFM18 is set.) This can be checked by monitoring BFM 18 or reading it by a FROM command. The FROM/TO Watchdog timer will automatically be reset by a TO access to BFM 14. The value of BFM 18 is stored non-volatile in the internal EEPROM. There is a safety function to protect the internal EEPROM from being destroyed by accidentally writing the same value continuously to BFM 18.

7-18

FX2N-5A Special function block Buffer Memory (BFM) 7

7.2.10 BFM 19 setting change enable/disable (READ/WRITE)

BFM 19 permits or prohibits the change of the I/O characteristics for the following functions:

BFM 0 (input channel mode settings) BFM 1 (output channel mode settings) BFM18 (hold/reset last value output) BFM 20 (reset all values to default) BFM 21 (offset/gain adjustment settings) BFM 22 (convenient function settings) BFM 25 (digital filter mode) BFM 41 to 45 (offset data settings) BFM 51 to 55 (gain data settings) BFM 200 to 249 (Scaling function settings)

The permitted values are as follows:

K1: Enables change (selected at shipment from factory). K2: Disables change.

On fault input, the module will return to the last valid input saved in EEPROM (values other than K1 or K2 will be ignored). The value of BFM 19 is stored as non-volatile in the internal EEPROM. There is a safety function to protect the internal EEPROM from being destroyed by accidentally writing the same value continuously to BFM 19.

7-19

FX2N-5A Special function block Buffer Memory (BFM) 7

7.2.11 BFM 20 Initialization function (reset all values to default) (READ/WRITE)

BFM 20 will reset the FX

-5A to the factory default. By initialization, the modes, average numbers, offset/gain settings, direct output control function, lower/upper-limit settings, Scaling function and sudden change function are all reset to factory default (voltage input/output, default offset/gain values).

Permitted values are as follows:

K0:Normal state, nothing is performed K1:initialization will be executed. After writing K1, the BFM will return automatically to K0 when

initialization is completed.

On fault input, the module will ignore other values than K1 and perform nothing except keeping K0 as content of BFM 20. Writing to BFM 20 triggers several data items to be written to the internal EEPROM. To protect the internal EEPROM from damage by permanently writing K1 to BFM 20, there is a safety function, which will memorize the reset in order to protect the internal EEPROM from being destroyed by accidentally writing K1 continuously to BFM 20.

Writing K1 to BFM 20 will set the following BFM to their default values as stated below:

BFM 0 to 5, BFM 18, BFM 22, BFM 23, BFM 25, BFM 41 to 45, BFM 51 to 55, BFM 71 to 74, BFM 81 to 84, BFM 91 to 94, BFM 200 to 249.

7-20

FX2N-5A Special function block Buffer Memory (BFM) 7

7.2.12 BFM 21 Writes I/O characteristics (offset/gain Scaling function setting) (READ/WRITE)

The b0 to b4 bits of BFM 21 are assigned to each channel of the FX

-5A. (Bit 4 is assingned to the analog output channel, bit 3 is assigned to input channel 4, bit 0 is assigned to input channel 1.) When a bit is set to ON, the offset data (BFM 41 to BFM 45) and the gain data (BFM 51 to BFM

55) or the Scaling function data (BFM 200 to BFM 249) of the assigned channel are written to the built-in memory (EEPROM). It is possible to adjust the settings for two or more channels at the same time (writing "H1F", will set the new offset/gain data for all channels). After writing is completed, BFM 21 returns automatically to K0. On fault input, the module will ignore other bits than b0 to b4 and perform nothing except keeping K0 as content of BFM21. Scale over status (BFM 28) data existing before a change of the I/O characteristics will not be automatically cleared by performing a change of the I/O characteristics. Writing to BFM 21 triggers data to be written to the internal EEPROM. To protect the internal EEPROM from being destroyed by permanently writing the same value to BFM 21, there is a safety function which will memorize the value of BFM 21 to protect the internal EEPROM from being destroyed by accidentally writing the same value continuously to BFM

BFM21

b15, b14, b13, b12, b11, b10, b9, b8, b7, b6, b5, b4

Invalid

1) Analog input CH1

2) Analog input CH2

3) Analog input CH3

4) Analog input CH4

5) Analog output channel

, b3, b2, b1, b0

21.

7-21

FX2N-5A Special function block Buffer Memory (BFM) 7

7.2.13 BFM 22 Convenient functions setting (READ/WRITE)

The functions described below are assigned to b0 to b3 of BFM 22. When a bit is set ON, the assigned functions become valid. Other bits, not specified by the values below, will simply be ignored by the module if they are accidentally set by the user. When a bit is set OFF, the assigned functions become invalid.

b0: Upper/lower limit average value detection function

If the A/D averaged conversion data of a channel (BFM 6 to BFM 9) is outside the range set between the lower limit value (BFM 71 to BFM 74) and the upper limit value (BFM 81 to BFM

84), corresponding alarm bits for each channel (lower limit alarm or higher limit alarm) are set in BFM 26.

b1: Upper/lower limit immediate value detection function

If the A/D immediate conversion data of a channel (BFM 10 to BFM 13) is outside the range set between the lower limit value (BFM 71 to BFM 74) and the upper limit value (BFM 81 to BFM

84), corresponding alarm bits for each channel (lower limit alarm or higher limit alarm) are set in BFM 26.

b2: Average data Peak value hold function

The minimum value of the average data (BFM 6 to BFM 9) of each channel is written to BFM 101 to BFM 104, and the maximum value is written to BFM 111 to BFM 114.

b3: Immediate data Peak value hold function

The minimum value of the immediate data (BFM 10 to BFM 13) of each channel is written to BFM 105 to BFM 108, and the maximum value is written to BFM 115 to BFM 118.

7-22

FX2N-5A Special function block Buffer Memory (BFM) 7

b8 to b11: switch off range over/range under alarm for corresponding input channel

The value of BFM 22 is stored non-volatile in the internal EEPROM. There is a safety function to protect the internal EEPROM from being destroyed by accidentally writing the same value continuously to BFM 22.

7.2.14 BFM 23 Set parameter for direct control between the input channel and output channel (READ/WRITE)

In BFM 23, the user can specify direct control feedback between all 4 analog input channels and the analog output channel. The format of BFM 23 is a 4 digit hex value and each digit is represents the operation of one input channel.

The values of the Hex digits are as follows:

H0:The corresponding analog input channel has no influence on the analog output value. H1:The average input value (BFM 6 to BFM 9) of the corresponding analog input channel is

added to the analog output value in BFM 14.

H2:The immediate input value (BFM 10 to BFM 13) of the corresponding analog input channel

is added to the analog output value in BFM 14.

H3:The average input value (BFM 6 to BFM 9) of the corresponding analog input channel is

subtracted from the analog output value in BFM 14.

H4:The immediate input value (BFM 10 to BFM 13) of the corresponding analog input channel

is subtracted from the analog output value in BFM 14.

H5 to HF: The corresponding analog input channel has no influence on the analog output

value, however, the direct output control error bit (bit 15) in BFM 29 will be switched on.

7-23

FX2N-5A Special function block Buffer Memory (BFM) 7

BFM#0

{{{{

CH1 CH2 CH3 CH4

Example: Value in BFM 23 is set to H1234. Output value (BFM 15) = BFM 14(TO) - BFM 10 - BFM 7 + BFM 12 + BFM 9

If at least one Hex digit in BFM 23 is set to a Hex number between 1 and 4, after calculating of the digital output value in BFM 15, the offset/gain setting calculation or the Scaling function calculation is applied to these digital data in order to achieve the real analog output. If the direct control function is switched off for all channels, BFM 14 will be regarded as the analog output value. The settings of BFM 25 will also influence the direct control function values.

7.2.15 BFM 24 Reserved

7-24

FX2N-5A Special function block Buffer Memory (BFM) 7

7.2.16 BFM 25 Filter-level selection register (READ/WRITE)

The following Table shows the possible values of BFM 25 for using the digital Filter of the

-5A-Device:

Table 7.2: Bit assignment in BFM 25

Bit No. Channel No. Description

b10

b11

b12

CH1 to CH4

Filter: 0 = off

1 = 2nd level 2 = 5th level 3 = 7th level

Cut-off frequency factor F 0 = no cut-off frequency selected 1 = (0.1×1/sampling time)Hz 2 = (0.05×1/sampling time)Hz 3 = (0.025×1/sampling time)Hz 4 = (0.01×1/sampling time)Hz

reserved

b13

b14

b15

reserved

7-25

FX2N-5A Special function block Buffer Memory (BFM) 7

Formula for filter cut-off frequency fL: fL = F1/(sampling time × no. of active channels) [Hz] with cut-off frequency factor F

=0.1, 0.05, 0.025 or 0.01.

There are two filter parameters that can be changed, the filter-level and the cut-off frequency. This selection is done in bit0 to bit7. The selected filter values apply to all channels 1 through 4 in the same way. Selecting a non existing filter mode or selecting a filter mode without specifying a cut-off frequency will lead to an error in BFM 29. In this case the previously valid settings will be kept.

The filter settings for the module also have a direct influence on the sampling rate and conversion speed of the module. The relation between selected filter level and sampling rate is as follows:

Table 7.3: Setting range

Filter Level (value in BFM25, b0 to b3)

filter off (K0) 1ms / ch update every 2 ms

2nd level digital filter (K1)* 3ms / ch update every 6 ms

5th level digital filter (K2)* 4ms / ch update every 8 ms

sampling time per input

channel

refresh rate of analog output

channel

7th level digital filter (K3)* 4.5ms / ch update every 9 ms

* In these cases b4 to b7 must be set to a value between K1 to K4.

The value of BFM 25 is stored non-volatile in the internal EEPROM. There is a safety function to protect the internal EEPROM from being destroyed by accidentally writing the same value continuously to BFM 25.

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FX2N-5A Special function block Buffer Memory (BFM) 7

A/D conversion value when input filter is used.

When input filter is used

The change of the A/D conversion value becomes smooth. It is smooth when numerical value at level is large.

Analog value Digital value

Time

Input filter and when cut-off frequency is used

Analog value Digital value

The change in shorter width than cut-off frequency is disregarded.

The change of the A/D conversion value becomes smooth. It is smooth when numerical value at level is large.

Time

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FX2N-5A Special function block Buffer Memory (BFM) 7

7.2.17 BFM 26 Upper/lower limit value alarm status (READ only)

If the upper/lower limit value detection function (BFM 22 b0, b1) is used, the detection results are written to BFM 26. The lower limit value alarm or the upper limit value alarm of each channel is assigned to each bit of BFM 26. If the A/D averaged conversion data of a channel (BFM 6 to BFM 9) is outside the range set between the lower limit value (BFM 71 to BFM 74) and the upper limit value (BFM 81 to BFM

84), the corresponding alarm bits b0 to b7 for each channel (lower limit alarm or higher limit alarm) are set in BFM 26. If the A/D immediate conversion data of a channel (BFM 10 to BFM 13) is outside the range set between the lower limit value (BFM 71 to BFM 74) and the upper limit value (BFM 81 to BFM

84), the corresponding alarm bits b8 to b15 for each channel (lower limit alarm or higher limit alarm) are set in BFM 26. Once a bit turns ON, it remains ON until it is reset by BFM 99 or the power is turned off. Even while an upper/lower limit value alarm is detected, the data (BFM 6 to BFM 13) of each channel are continuously updated.

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FX2N-5A Special function block Buffer Memory (BFM) 7

Table 7.4: Bit assignment in BFM 26

Bit No. Channel No. Description

average data lower limit value alarm

CH1

b1 average data upper limit value alarm

average data lower limit value alarm

CH2

b3 average data upper limit value alarm

average data lower limit value alarm

CH3

b5 average data upper limit value alarm

average data lower limit value alarm

CH4

b7 average data upper limit value alarm

immediate data lower limit value alarm

CH1

b9 immediate data upper limit value alarm

b10

immediate data lower limit value alarm

CH2

b11 immediate data upper limit value alarm

b12

immediate data lower limit value alarm

CH3

b13 immediate data upper limit value alarm

b14

immediate data lower limit value alarm

CH4

b15 immediate data upper limit value alarm

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FX2N-5A Special function block Buffer Memory (BFM) 7

7.2.18 BFM 27 A/D data sudden change detection status (READ only)

When the sudden change detection function is used, the detection result is written to BFM 27. The sudden change detection is activated, if the values in BFM 91 to BFM 94 are bigger than

0. The sudden change detection in + direction or the sudden change detection in - direction of each channel is assigned to each corresponding bit of BFM 27. When the immediate data (BFM 10 to BFM 13) of each channel is updated, if the difference between the previous value and the new value is larger than the sudden change detection set value (BFM 91 to BFM 94), the corresponding bit turns ON. When the new value is larger than the previous value, a bit for the + direction turns ON. If, the new value is smaller than the previous value, a bit for the - direction turns ON. Once a bit turns ON, it remains ON until it is reset by BFM 99 or the power is turned off. Even while a sudden change alarm is detected, the data (BFM 6 to BFM 13) of each channel is continuously updated.

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FX2N-5A Special function block Buffer Memory (BFM) 7

Table 7.5: Bit assignment in BFM27

Bit No. Channel No. Description

average data sudden change error in - direction

CH1

b1 average data sudden change error in + direction

average data sudden change error in - direction

CH2

b3 average data sudden change error in + direction

average data sudden change error in - direction

CH3

b5 average data sudden change error in + direction

average data sudden change error in - direction

CH4

b7 average data sudden change error in + direction

immediate date sudden change error in - direction

CH1

b9 immediate date sudden change error in + direction

b10

immediate date sudden change error in - direction

CH2

b11 immediate date sudden change error in + direction

b12

immediate date sudden change error in - direction

CH3

b13 immediate date sudden change error in + direction

b14

immediate date sudden change error in - direction

CH4

b15 immediate date sudden change error in + direction

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FX2N-5A Special function block Buffer Memory (BFM) 7

7.2.19 BFM 28 Scale over status (READ/WRITE)

When the analog input value of each channel (BFM 10 to BFM 13) is outside the maximum range of the A/D converter, arange error alarm is written to BFM 28. This will also happen if a sensor is disconnected and ±100mV mode has been selected. Additionally, the alarm is set if the Scaling function is used and the conversion result is outside the specified values for this channel. To avoid the alarm being set for unused channels, they should be completely disabled in BFM

0. It is also possible to inhibit only the scale over alarm by setting the corresponding bits of BFM22. Once a bit turns ON, it remains ON until it is overwritten with the OFF status using a TO instruction to BFM 28 or the power is turned off. Single alarm bits can be masked, by writing a bit mask code to BFM 28. For example, HFFF0 will only clear the lowest 4 bits. Even while a scale over error is detected, the data (BFM 6 to BFM 13) of each channel is continuously updated.

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FX2N-5A Special function block Buffer Memory (BFM) 7

Table 7.6: Bit assignment in BFM28

Bit No. Channel No. Description

Scale over: Less than lower limit and disconnection detection

CH1

b1 Scale over: More than upper limit

Scale over: Less than lower limit and disconnection detection

CH2

b3 Scale over: More than upper limit

Scale over: Less than lower limit and disconnection detection

CH3

b5 Scale over: More than upper limit

Scale over: Less than lower limit and disconnection detection

CH4

b7 Scale over: More than upper limit

Scale over: Less than lower limit

output CH

b9 Scale over: More than upper limit

b10 reserved

b11 reserved

b12 reserved

b13 reserved

b14 reserved

b15 reserved

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FX2N-5A Special function block Buffer Memory (BFM) 7

7.2.20 BFM 29 Error status

The error information is assigned to each bit of BFM 29.

Table 7.7: Bit assignment in BFM 29

Bit No. Assignment Description

b0 Error detected b0 is ON if at least one output of b1 to b5 is ON.

Offset/gain set value error or Scaling function setting error.

b2 Power error External 24 V power is not supplied.

b3 Hardware error FX

b4 A/D conversion value error

b5 D/A conversion value error

b6 reserved

b7 reserved

b8 Set value error detected This bit is ON while either bit among b9 to b15 is ON.

b9 Input/output mode setting error

Offset/gain value or Scaling function value is outside setting range.Set a correct value. Previously valid values or default values are used.

-5A hardware error (EEPROM, MCU periphery)

A/D conversion value is out of range / wire break. See scale over data (BFM 28)

D/A conversion value is out of range, value in BFM 14/BFM 15 is too large.

Input/output mode (BFM 0, BFM 1) is incorrectly set. Set it within range from 0 to B or F (BFM 0) or 0 to A (BFM 1).

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FX2N-5A Special function block Buffer Memory (BFM) 7

Table 7.7: Bit assignment in BFM 29

Bit No. Assignment Description

Number of averaging times is incorrectly set.Set it within range from 1 to 256.

b10

Number of averaging times setting error

If the no. of average data was set to a value outside the range of 1 to 256, the corresponding BFM was set to 1. In this case, the direct conversion value will be displayed for the corresponding channel.

b11

Attempt of setting change while BFM19 was looked

Sudden change detection set

b12

value error

Upper/lower limit value set

b13

value error

b14 Filter mode setting error

Direct output control function

b15

setting error

Although the value in BFM 19 prohibits to change the setting, a write access to a protected BFM was registered. No setting changes have been executed.

The sudden change detection value is set to an incorrect value. (valid range 0 to 32000)

Upper/lower limit alarm value is set to an incorrect value (valid range: -32000 ≤ X ≤ +32000).

Filter mode (BFM 25) is incorrectly set. Set the lowest two digits to a valid range according to the description of BFM

25.

The direct output control function is set to an undefined value. Set each digit between a range of 0 and 4. The number was reset to the previous value.

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FX2N-5A Special function block Buffer Memory (BFM) 7

The error b1 appears when:

- in voltage-mode: offset data > 5000

gain data < -5000

gain data - offset data < 1000

- in current-mode: offset data > 10000

gain data < -10000

gain data - offset data < 1000

All errors except b2 and b3 will be cleared automatically, when the error is not existing any more, or when the corresponding alarm/error bits in other BFMs (sudden change/ scale over/ upper/lower limit) are cleared.

In case of a power error or a hardware error, the error bits are latched, until K0 or another mask value i. e. HFFF3 to clear the bits is written to BFM 29, or until the power is turned off.

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FX2N-5A Special function block Buffer Memory (BFM) 7

7.2.21 BFM 30 Model ID code (READ only)

BFM 30 stores the fixed value K1010. Write attempts by TO instruction are ignored.

7.2.22 BFM 31 to BFM 40 reserved

7.2.23 BFM 41 to BFM 44 Analog input Offset data (READ/WRITE)

Input Offset data: Analog input value when the digital value is "0". For default values and setting ranges, see table below (BFM 51 to BFM 54). The values of BFM 41 to 44 are stored non-volatile in the internal EEPROM. There is a safety function to protect the internal EEPROM from being destroyed by accidentally writing the same value continuously to a BFM.

7.2.24 BFM 45 Analog output Offset data (READ/WRITE)

Output Offset data: Analog output voltage or current if digital input in BFM 14 is 0. Default offset value for voltage mode (-10V/+10V) is 0V(=K0), for current mode (4 - 20mA) is 4mA(=K4000) and for current mode (0 - 20mA) is 0mA(=K0). The value of BFM 45 is stored non-volatile in the internal EEPROM. There is a safety function to protect the internal EEPROM from being destroyed by accidentally writing the same value continuously to BFM 45.

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FX2N-5A Special function block Buffer Memory (BFM) 7

7.2.25 BFM 51 to BFM 54 Analog Input Gain data (READ/WRITE)

Input Gain data: Analog input value when the digital value is 16000 (or 1000 in mode 4). The offset data and the gain data for each channel can be set independently. The set value is written in "mV" for voltage input (-10V/+10V), in "

V units for ±100mV input.

A" for current input and in

The values of BFM 51 to 54 are stored non-volatile in the internal EEPROM. There is a safety function to protect the internal EEPROM from being destroyed by accidentally writing the same value continuously to a BFM. Initial offset/gain value (Unit: mV for voltage input,

A for current input and 10µV for ±100mV

input)

Table 7.8: Initial offset/gain input value

Amperemeter mode

(4 to 20mA)

Amperemeter mode

(-20 to +20mA)

(-10

+10V)

(4 to 20mA)2(-20 to +20mA)

Input mode

(BFM 0)

Initial offset value 0 4000 0 0 0

Initial gain value 5000 unit:mV 12000 unit:µA 10000 unit:µA 5000 unit:10µV 5000 unit:10µV

Input mode

(BFM 0)

(-10

Voltmeter mode

(-100 to

+100mV)

Voltmeter mode

(-100 to +100mV)

(-100

+100mV)

Initial offset value 0 fixed 0 fixed 0 fixed 0 fixed

Initial gain value

16000 fixed

unit:mV

16000 fixed

unit:

16000 fixed

unit:µA

16000 fixed

unit:10µV

Note: This table is not applicable for modes 9 to B (see Scaling function settings.)

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FX2N-5A Special function block Buffer Memory (BFM) 7

Setting range

Table 7.9: Setting range

Voltage input (+/-10V) Current input Voltage input (+/-100mV)

Offset data -32000 to +5000 (mV) -32000 to +10000 (

Gain data -5000 to +32000 (mV) -10000 to +32000 (

Gain data -

offset data

Gain value - Offset value > 1000 (mV)

Gain value - Offset value > 1000 (

A) -32000 to +5000 (*10µV)

A) -5000 to +32000 (*10µV)

Gain value - Offset value > 1000 (* 10 µV)

However, the actual effective input range is "-10 to +10 V", "-20 to +20 mA", "4 to +20 mA" or "-100 to +100mV".

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FX2N-5A Special function block Buffer Memory (BFM) 7

7.2.26 BFM 55 Analog output Gain data (READ/WRITE)

Output Gain data: Analog output voltage or current if digital input in BFM 14 is 16000 (or 1000 as stated in table below) default gain value for voltage mode (-10V/+10V) is 5V (=K5000), for current mode (4 - 20mA) is 12mA(=K12000) and for current mode (0 - 20mA) is 10mA (=K10000). The value of BFM 55 is stored non-volatile in the internal EEPROM. There is a safety function to protect the internal EEPROM from being destroyed by accidentally writing the same value continuously to BFM 55.

Table 7.10: Initial offset/gain value(Unit: mV for voltage output,

BFM 14 value for gain output

Output mode (BFM 1)

Initial offset value

Initial gain value

16000 1000 16000 500 16000 500 (16000*) 16000 16000

(-10V to

+10V)

0 0 4000 4000 0 0 0 fixed 0 fixed 0 fixed

5000

unit:mV

(-10V to

+10V)

5000

unit:mV

(4 to

20mA)

12000

unit:

(4 to

20mA

12000

unit:µA

(0 to

20mA)

10000

unit:µA

(0 to

20mA)

10000

unit:µA

A for current output)

absolute

voltage

mode

16000

fixed

unit:mV

absolute

current

mode

16000

fixed

unit:

absolute

current

mode

16000

unit:

fixed

Note: This table is not applicable for modes 9 to A (see Scaling function settings).

* In absolute voltage output mode, the theoretical value is 16000, however in reality it is not

possible to exceed 10V output voltage (BFM14=10000).

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FX2N-5A Special function block Buffer Memory (BFM) 7

7.2.27 BFM 71 to BFM 74 Lower limit, alarm set value (READ/WRITE)

7.2.28 BFM 81 to BFM 84 Upper limit, alarm set value (READ/WRITE)

The upper/lower limit value of the alarm detection function (BFM 22 b0, b1) is written to the lower limit value of each channel from BFM 71 to BFM 74 and the upper limit value of each channel from BFM 81 to BFM 84. The values of BFM 71 to 74 and BFM 81 to 84 are stored non-volatile in the internal EEPROM. There is a safety function to protect the internal EEPROM from being destroyed by accidentally writing the same value continuously to a BFM.

The range of setting is different according to setting the input mode. Please write a set value in a digital value.

Input mode (BFM#0) Range of setting

0: Voltage input mode -32000 to +32000

1: Current input mode 0 to 32000

2: Current input mode -32000 to +32000

3: Voltage input mode -32000 to +32000

4: Voltage input mode -2000 to +2000

5: Voltmeter display mode -10000 to +10000

6: Amperemeter display mode 2000 to 20000

7: Amperemeter display mode -20000 to +20000

8: Voltmeter display mode -10000 to +10000

9: Scaling function voltage input mode -32768 to +32767

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FX2N-5A Special function block Buffer Memory (BFM) 7

Input mode (BFM#0) Range of setting

A: Scaling function current input mode -32768 to +32767

B: Scaling function voltage input mode -32768 to +32767

C to E: It is not possible to set. Invalid

F: No input channel use Invalid

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FX2N-5A Special function block Buffer Memory (BFM) 7

7.2.29 BFM 91 to BFM 94 Sudden change detection set value (READ/WRITE)

When using the sudden change detection functions, the set value to judge the sudden change is written to BFM 91 to 94. If the value is 0, the function is disabled. The valid setting range is between 0 and 32000. When the immediate or average data (BFM 6 to BFM 13) of each channel is updated, and the difference between the previous value and the new value is larger than the sudden change detection value (BFM 91 to BFM 94), the result is written to the sudden change detection status (BFM 27).

The range of setting is different according to setting the input mode. Please write a set value in a digital value.

Input mode (BFM#0) Range of setting

0: Voltage input mode 0 to 32000

1: Current input mode 0 to 32000

2: Current input mode 0 to 32000

3: Voltage input mode 0 to 32000

4: Voltage input mode 0 to 2000

5: Voltmeter display mode 0 to 10000

6: Amperemeter display mode 0 to 20000

7: Amperemeter display mode 0 to 20000

8: Voltmeter display mode 0 to 10000

9: Scaling function voltage input mode 0 to 32000

A: Scaling function current input mode 0 to 32000

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FX2N-5A Special function block Buffer Memory (BFM) 7

Input mode (BFM#0) Range of setting

B: Scaling function voltage input mode 0 to 32000

C to E: It is not possible to set. Invalid

F: No input channel use Invalid

7.2.30 BFM 99: Clears upper/lower limit value error and sudden change detection error (READ/ WRITE)

The commands to clear the lower limit value error, upper limit value error and sudden change detection error are assigned to the lower three bits of BFM 99. When a bit is set ON, the flag of the corresponding error status (BFM 26, BFM 27) is reset for all channels at a time. After the reset is finished, each bit of BFM 99 automatically sets OFF. It is possible to set two or more clear commands ON at a time.

Table 7.11: Bit assignment in BFM 99

Bit No. Description

b3 to b15

Clears lower limit value error.

Clears upper limit value error.

Clears sudden change detection error.

Unused

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FX2N-5A Special function block Buffer Memory (BFM) 7

7.2.31 BFM 101 to BFM 108 Peak value (minimum value) (READ only)

7.2.32 BFM 111 to BFM 118 Peak value (maximum value) (READ only)

When the peak value hold function (BFM 22 b2,b3) is used the minimum average values of the data (BFM 6 to BFM 9) of each channel is written from BFM 101 to BFM 104, the immediate value minimums (BFM 10 to BFM 13) are written from BFM 105 to 108. The maximum average values are written from BFM 111 to BFM 114 and the immediate maximum values are written from BFM 115 to 118.

Initial value

When the peak hold function is not used: K0 When the peak hold function is used: Digital value when the function is set ON

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FX2N-5A Special function block Buffer Memory (BFM) 7

7.2.33 BFM 109: Peak value reset flag (minimum value) (READ/WRITE)

7.2.34 BFM 119: Peak value reset flag (maximum value) (READ/WRITE)

When the peak value hold function (BFM 22 b2, b3) is used, BFM 109 clears the peak value (minimum value) stored in BFM 101 to BFM 108, and BFM 119 clears the peak value (maximum value) stored in BFM 111 to BFM 118. The channel No. to be reset is assigned to each bit of BFM 109 and BFM 119. When a bit is set ON, the peak value of the assigned channel is cleared.

Table 7.12: Bit assignment

BFM

109

BFM

119

)

b15 to b8

Unusable

Bit No

Channel No.

(BFM No.)

Bit No. b15 to b8

Channel No.

(BFM No.

b7 b6 b5 b4 b3 b2 b1 b0

CH4 im

(#108)

CH3 im

(#107)

CH2 im

(#106)

CH1 im

(#105)

CH4 av

(#104)

CH3 av

(#103)

CH2 av

(#102)

b7 b6 b5 b4 b3 b2 b1 b0

CH4 im

(#118)

CH3 im

(#117)

CH2 im

(#116)

CH1 im

(#115)

CH4 av

(#114)

CH3 av

(#113)

CH2 av

(#112)

CH1 av

(#101)

CH1 av

(#111)

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FX2N-5A Special function block Buffer Memory (BFM) 7

7.2.35 BFM 200 to BFM 249 Scaling function (READ/WRITE)

The Scaling function enables an analog input or output curve, for processes that are not linear over the whole data range. The user can specify up to 5 analog/digital values, that will define an input characteristic curve.

If the Scaling function is used, the offset/gain settings will become meaningless for this channel, as the input/output will be calculated by the Scaling function given by the user. Analog scale value and digital value outside the range selected by BFM 0 and 1 is set. Offset/gain set value becomes error (BFM 29 b1).

Table 7.13: Allocation of BFM #200 to #249

BFM No.

Channel No. Set value kind

Analog input channel CH1

Analog input channel CH2

Analog input channel CH3

Analog input channel CH4

Analog output channel

Analog scale value #200 #202 #204 #206 #208

Digital value #201 #203 #205 #207 #209

Analog scale value #210 #212 #214 #216 #218

Digital value #211 #213 #215 #217 #219

Analog scale value #220 #222 #224 #226 #228

Digital value #221 #223 #225 #227 #229

Analog scale value #230 #232 #234 #236 #238

Digital value #231 #233 #235 #237 #239

Digital value #240 #242 #244 #246 #248

Analog scale value #241 #243 #245 #247 #249

Change

point 1

Change

point 2

Change

point 3

Change

point 4

Change

point 5

The order of allocating an analog value and a digital value differs for in the input channels and the output channel.

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FX2N-5A Special function block Buffer Memory (BFM) 7

Scaling function setting procedures

The Scaling function is set according to the following procedure.

1) Please make a set change in the I/O characteristic permission (BFM19=K1).

↓

2) Please write the mode which uses the Scaling function in BFM0 and BFM1.

↓

3) Please write the value of BFM200 to 249 allocated to the analog input/output channel.

↓

4) Make the value of BFM200 to 249 effective by analog input channel of writes I/O

characteristics.

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FX2N-5A Special function block Buffer Memory (BFM) 7

Program example when Scaling function is used

Initial pulse

M8002

TO K0 K19 K1 K1

Set change permission of I/O characteristic

TO K0 K0 H9 K1

TO K0 K200 K1

TO K0 K201 K1

K-10000

K10000TO K0 K202 K1

K10000TO K0 K203 K1

H1TO K0 K21 K1

Input mode setting Analog input CH1 is set in Scaling function

Analog scale value of change point 1

Digital value of change point 1

Analog scale value of change point 2

Digital value of change point 2

Writing of input characteristic

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FX2N-5A Special function block Buffer Memory (BFM) 7

RUN monitor

M8000

D106FROM K0 K6 K1

Reading of average value data of analog input CH1 (Average value of CH1

D106)

→

D110FROM K0 K10 K1

D128FROM K0 K28 K1

D129FROM K0 K29 K1

END

Reading of immediate data of analog input CH1 (Immediate data of CH1

Reads the scale over status BFM#28

Reads the error status BFM#29

→

D110)

→

D128

D129

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FX2N-5A Special function block Buffer Memory (BFM) 7

• The range in which the analog scale value and digital value can be set varies according to

the I/O mode selected for BFM0 and BFM1. When setting the analog scale value, write the value converted to percentage (1/100).

analog value

analog scale value

maximum analog value

100

100=

Example: When input mode 9 (scaling-function voltage input mode: -10 to +10V) is chosen

in BFM 0

Analog value -10V -5V 0V 5V 10V

Associated analog value -100% -50% 0% 50% 100%

Analog scale value -10000 -5000 0 5000 10000

If the analog scale value and digital value are outside the selected range set in BFM 0 and BFM 1, the offset / gain set value errors (BFM 29 b1).

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FX2N-5A Special function block Buffer Memory (BFM) 7

Setting range of analog input

Set BFM 0 to 9 Set BFM 0 to A Analog scale value: -10000 to +10000 Analog scale value: 2000 to 10000 Digital value : -32768 to +32767 Digital value : -32768 to +32767

Change point 1

-10000 (-10V)

Digital value

32767

Change point 2

-32768

Change point 4

Change point 3

Change point 5

Analog scale value (Unit : 1/100 %)

10000

(10V)

Digital value

32767

-32768

Change point 1

2000

(4mA)

Change point 2

Change point 4

Change

point 5 Change point 3

Analog scale value (Unit : 1/100 %)

10000

(20mA)

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FX2N-5A Special function block Buffer Memory (BFM) 7

Set BFM 0 to B Analog scale value: -10000 to +10000 Digital value : -32768 to +32767

Digital value

Change point 5

Change point 4

Analog scale value (Unit : 1/100 %)

Change point 1

32767

Change point 3

Change point 2

-10000

(-100mV)

-32768

10000

(100mV)

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FX2N-5A Special function block Buffer Memory (BFM) 7

Setting range of analog output

Set BFM 1 to 9 Set BFM 1 to A Analog scale value: -10000 to +10000 Analog scale value: 0 to 10000 Digital value : -32768 to +32767 Digital value : -32768 to +32767

Change point 1

-32768

10000

(10V)

Change point 3

Change point 2

-10000 (-10V)

Change point 4

Analog scale value (Unit : 1/100 %)

Change point 5

Digital value

32767

Change point 2

Change point 1

10000

(20mA)

(0mA)

Change point 3

Analog scale value (Unit : 1/100 %)

Change point 4

Change point 5

Digital value

32767-32768

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FX2N-5A Special function block Buffer Memory (BFM) 7

• The value which can be set depends on the selection of BFM 0 and 1. Analog values and digital values outside the range selected by BFM 0 and 1 are set, thus, offset/gain set value error (BFM 29 b1) will occur.

✔✗

Digital value

Change point 1

Analog scale value

(Available) (Not available)

Change point 3

Change point 2

Figure 1

Change point 1

Change point 2

Digital value

Analog scale value

Change point 3

• Please set analog values and digital values in Change point 1 < Change point 2 < Change point 3. When "The small number change point" ≤ "The large number change point" is set, offset/ gain set value error (BFM 29 b1). (See figure 1.)

• When using less then three change points, please specify an analog scale and a digital value for those change points not used as K0 (initial value). (See figure 1.)

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FX2N-5A Special function block Buffer Memory (BFM) 7

✔✗

Digital

value

Change

point 2

Change point 1

(Available) (Not available)

Digital

Change

point 3

Analog

scale value

Change

Figure 2

value

point 2

Change point 1

Analog

scale

value

Change point 3

• When using K0 as a change point setting value, the subsequent change point value must the larger in both the "Digital value" and "Analog scale value". (See figure 2.)

• The I/O to be entered for each channel should fall within the range of the analog scale value of Change point 1 (minimum value) to that of Change point 3 (maximum value). When an analog value outside this range is entered, scale over error (BFM 28) occurs.

• As for scale over less than lower limit and disconnection detection, a minimum analog value of change point 1 to 3 is stored in analog input value (BFM 6 to 9, 10 to 13). As for scale over more than upper limit, a maximum analog value of change point 1 to 3 is stored in analog input value (BFM 6 to 9, 10 to 13).

• Offset data (BFM 41 to 45) and gain data (BFM 51 to 55) of the channel which uses Scaling function is disregarded.

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FX2N-5A Special function block Buffer Memory (BFM) 7

The figure below shows the example for an analog input.

Example for the Analog Input Non Linearity function

450

BFM#206:10000

400

BFM#207:425

350

300

250

200

150

Calculated Digital Value

100

BFM#200:-10000 BFM 201 :50

-10000 -8000 -6000 -4000 -2000 0

BFM#202:-4000 BFM#203:275

2000

BFM#204:3000 BFM#205:375

4000 6000 8000 10000

Analog Input Scale Value (% of maximum range)

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FX2N-5A Special function block Buffer Memory (BFM) 7

Table 7.14:

Change point 1 Change point 2 Change point 3 Change point 4 Change point 5

Analog Input Scale Value

Calculated Digital Value

BFM#200:-10000 BFM#202:-4000 BFM#204:3000 BFM#206:10000 BFM#208: K0

BFM#201:50 BFM#203:275 BFM#205:375 BFM#207:425 BFM#209: K0

If the Scaling function is selected, the analog module will return the following values in BFM 10:

analog input value: x < -10000: y = const. 50 (range error is entered in BFM28) analog input value: -10000 < x < -4000 y = 0.0375 * x + 425 analog input value: -4000 < x < 3000 y = 0.0143 * x + 332,15 analog input value: 3000 < x < 10000 y = 0.0071 * x + 353.85 analog input value: x > 10000 y = const. 425 (range error is entered in BFM28)

The same principle applies for the analog output, however, the first value in BFM 240 must be a digital value and the second value must be the corresponding analog output value. The dimension of the values is specified by the mode in BFM 0 and BFM 1.

If a mode-change is set and a Scaling function setting error appears the default-value will be taken. If only a Scaling function setting error appears, the previous correct value will be take. At least the first two analog/digital values must be set. If the other three analog/digital values are set to 0 they will not be used by the Scaling function. By setting the first three analog/digital value and resetting the last two analog/digital values, three parameter will be used by the Scaling function etc.

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FX2N-5A Special function block

8. Adjustment of I/O Characteristics

The factory, the FX2N-5A has standard I/O characteristics in accordance with each input mode (BFM #0, BFM #1) set as the factory default. In the voltage input mode and current input mode, adjust the standard I/O characteristics for each channel. (The user cannot adjust the standard I/O characteristics in the analog value direct input mode and the analog value direct output mode.)

8.1 Standard I/O characteristics

Explanation

The I/O mode of the standard I/O characteristics is abbreviated as shown below:

0. Voltage input, -10 to 10V → -32000 to 32000

Adjustment of I/O Characteristics 8

Input mode set in BFM #0, BFM #1

Input mode or output mode

Analog input range or Analog output range

In the Voltmeter/Amperemeter analog input mode, Absolute Voltage/Current output mode and the Scaling function, 3) Digital value of Analog input range or Analog output range is omitted.

8-1

FX2N-5A Special function block Adjustment of I/O Characteristics 8

Digital value

Input current

(mA)

420

32000

Approx.

32767

Approx.

20.383

-4000

Input characteristics

0. Voltage input, -10 to 10V → -32000 to +32000 1. Current input, 4 to 20mA → 0 to 32000

Digital value

Approx.32767

32000

Input

voltage

(V)

Approx.

-10

Approx.

-10.240V

-32000 Approx.-32768

10.240V

8-2

FX2N-5A Special function block Adjustment of I/O Characteristics 8

Digital value

-100

100

32000

Approx.32767

Approx.

102.397mV

Approx.

-102.400mV

-32000 Approx.-32768

Input

voltage

(mV)

Digital value

-10

10000

Approx.10239

Approx.

10.240V

Approx.

-10.240V

-10000 Approx.-10240

Input

voltage

(V)

2.Current input, -20 to 20mA → -32000 to +32000 3.Voltage input, -100 to 100mV →

32000 to +32000

Digital value

Approx.32767

32000

Input

current

(mA)

-20

Approx.

-20.480mA

-32000 Approx.-32768

Approx.

20.480mA

4.Voltage input, -100 to 100mV → -2000 to +2000 5.Voltmeter mode, direct display, -10 to 10V

Digital value

Approx.2047

2000

Input

voltage

(mV)

-100

100

Approx.

102.397mV

Approx.

-102.400mV

-2000 Approx.-2048

8-3

FX2N-5A Special function block Adjustment of I/O Characteristics 8

Digital value

-20

20000

Approx.20478

Approx.

20.478mA

Approx.

-20.478mA

-20000 Approx.-20478

Input

current

(mA)

6. Direct current input, 2 to 20mA 7. Direct current input, -20 to 20mA

Digital value

Approx.

20478

20000

Approx.

20.478mA

4000 2000

04 20

Input current

(mA)

8. Direct voltage input, -100 to 100mV

Digital value

Approx.10239

10000

Input

voltage

(mV)

-100

100

Approx.

-102.400mV

-10000 Approx.-10240

Approx.

102.397mV

8-4

FX2N-5A Special function block Adjustment of I/O Characteristics 8

Digital

value

-10

2000

Approx.10.240

Approx.2047

Approx.-2048

-2000

Approx.-10.240

Output Voltage (V)

Output characteristics

0.Voltage output, -32000 to +32000 → -10 to 10V 1.Voltage output, -2000 to +2000 →

-10 to 10V

Output Voltage (V)

Approx.10.240

Digital

value

-32000

Approx.-32768

Approx.32767

32000

-10 Approx.-10.240

8-5

FX2N-5A Special function block Adjustment of I/O Characteristics 8

Digital value

Output current (mA)

1000

Approx.

1023

Approx.

20.38

Digital value

Output current (mA)

1000

Approx.

1023

Approx.

20.48

2. Current output, 0 to 32000 → 4 to 20mA 3. Current output, 0 to 1000 → 4 to 20mA

Output current (mA)

Approx.

20.38 20

Digital value

32000

Approx.

32767

4. Current output, 0 to 32000 → 0 to 20mA 5. Current output, 0 to 1000 → 0 to 20mA

Output current (mA)

Approx.

20.48

32000

Approx.

32767

8-6

Digital value

FX2N-5A Special function block Adjustment of I/O Characteristics 8

Digital value

Output current (mA)

20000

4000

Approx.

20479

Approx.

20.479

6. Analog value direct output, -10 to 10V 7. Analog value direct output, 4 to 20mA

Output Voltage (V)

Approx.10.239

Digital

value

-10000

Approx.-10240

Approx.10239

10000

-10 Approx.-10.240

8. Analog value direct output, 0 to 20mA

Output current (mA)

Approx.

20.479

Digital value

20000

Approx.

20479

8-7

FX2N-5A Special function block Adjustment of I/O Characteristics 8

8.2 Adjustment of I/O characteristics

Adjust the I/O characteristics using the buffer memories in the FX2N-5A. At first, write the input/output mode to BFM #0 and BFM #1, write the offset data to BFM #41 to BFM #45, then write the gain data to BFM #51 to BFM #55. Finally, update the offset data and the gain data of each channel using BFM #21.

8-8

FX2N-5A Special function block Adjustment of I/O Characteristics 8

Figure 8.1: Example program

M100

K0 K0

H1600

Specifies the input mode of CH1 to CH4.

Operation start

PLS

instruction

M100

TO K0 K1

TO K0 K41 K0 K1

TO K0 K42 K0 K1

TO K0 K51

TO K0 K52

TO K0 K44 K0 K1

TO K0 K54

TO K0 K45 K0 K1

TO K0 K55

TO K0 K21

H0001

K6000

K10000

K6000

H001B

Specifies the output mode.

Writes the offset value of CH1.

Writes the offset value of CH2.

Writes the gain value of CH1.

Writes the gain value of CH2.

Writes the offset value of CH4.

Writes the gain value of CH4.

Offset value of analog output channel.

Gain value of analog output channel.

Offset value/gain value of analog input channel CH1, CH2, CH4 and the analog output channel is write.

The I/O characteristics can be written (BFM #21) to one channel at a time, or two or more channels at a time.

8-9

FX2N-5A Special function block Adjustment of I/O Characteristics 8

MEMO

8-10

Mitsubishi Electronics FX2N-5A User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Manual number : JY997D11401

Note Concerning the CE Marking

1. Introduction

2. External Dimensions and Parts

3. Installation

4. Connection to PLC

5. Wiring

5.1 Caution

5.2 Input Wiring

5.3 Output Wiring

6. Specifications

7. Buffer Memory (BFM)

7.1 Buffer Memories (BFM) lists

7.2 Details of buffer memories

7.2.1 BFM 0 input mode specification (READ/WRITE)

7.2.2 BFM 1 output mode specification (READ/WRITE)

7.2.3 BFM 2 to BFM 5 Number of averaging times (READ/WRITE)

7.2.4 BFM 6 to BFM 9 Averaged Input Channel data (READ only)

7.2.5 BFM 10 to BFM 13 Immediate Input Channel data (READ only)

7.2.6 BFM 14 Analog Output data (READ/WRITE)

7.2.7 BFM 15 Calculated Analog output data (when direct control function is active) (READ only)

7.2.8 BFM 16 to BFM 17 Reserved

7.2.9 BFM 18 hold/ reset analog output when PLC is stopped (READ/WRITE)

7.2.10 BFM 19 setting change enable/disable (READ/WRITE)

7.2.11 BFM 20 Initialization function (reset all values to default) (READ/WRITE)

7.2.12 BFM 21 Writes I/O characteristics (offset/gain Scaling function setting) (READ/WRITE)

7.2.13 BFM 22 Convenient functions setting (READ/WRITE)

7.2.14 BFM 23 Set parameter for direct control between the input channel and output channel (READ/WRITE)

7.2.15 BFM 24 Reserved

7.2.16 BFM 25 Filter-level selection register (READ/WRITE)

7.2.17 BFM 26 Upper/lower limit value alarm status (READ only)

7.2.18 BFM 27 A/D data sudden change detection status (READ only)

7.2.19 BFM 28 Scale over status (READ/WRITE)

7.2.20 BFM 29 Error status

7.2.21 BFM 30 Model ID code (READ only)

7.2.22 BFM 31 to BFM 40 reserved

7.2.23 BFM 41 to BFM 44 Analog input Offset data (READ/WRITE)

7.2.24 BFM 45 Analog output Offset data (READ/WRITE)

7.2.25 BFM 51 to BFM 54 Analog Input Gain data (READ/WRITE)

7.2.26 BFM 55 Analog output Gain data (READ/WRITE)

7.2.27 BFM 71 to BFM 74 Lower limit, alarm set value (READ/WRITE)

7.2.28 BFM 81 to BFM 84 Upper limit, alarm set value (READ/WRITE)

7.2.29 BFM 91 to BFM 94 Sudden change detection set value (READ/WRITE)

7.2.30 BFM 99: Clears upper/lower limit value error and sudden change detection error (READ/ WRITE)

7.2.31 BFM 101 to BFM 108 Peak value (minimum value) (READ only)

7.2.32 BFM 111 to BFM 118 Peak value (maximum value) (READ only)

7.2.33 BFM 109: Peak value reset flag (minimum value) (READ/WRITE)

7.2.34 BFM 119: Peak value reset flag (maximum value) (READ/WRITE)

7.2.35 BFM 200 to BFM 249 Scaling function (READ/WRITE)

8. Adjustment of I/O Characteristics

8.1 Standard I/O characteristics

8.2 Adjustment of I/O characteristics