LG G6F-AD2A, G3F-AD3A, G4F-AD3A User Manual

User’ s Manual

LG Programmable Logic Controller

LG Industrial Systems

G3F-AD3A

G4F-AD3A
G6F-AD2A

Safety Precautions

If not provided with proper prevention, it can cause death

If not properly observed, it can cause a hazard situation

CAUTION

Design Precautions

Do not run I/O signal lines near to high
voltage line or power line. Separate
them as 100mm or more as possible.

se can cause module

Installation Precautions

Operate the PLC in the environment
conditions given in the general

If operation in other environment not
specified, it can cause an electric shock,
a fire, malfunction or damage or

Make sure the module fixing projections
is inserted into the module fixing hole

Improper installation of the module can

Safety Precautions

Be sure to read carefully this safety precaution given in data sheet and user’s manual before
operating the module and follow them.

The precautions explained here only apply to the G3F-AD3A, G4F-AD3A, and G6F-AD2A.
For safety precautions on the PLC sys tem, please see the MASTER-K 200S/300S/1000S

User’s manual and the GLOFA GM3/4/6 User’s manual.
A precaution is given with a hazard alert triangular symbol to call your attention, and precautions

are represented as follows according to the degree of hazard.

However, a precaution followed with can also result in serious conditions.
Both of two symbols indicate that an important content is mentioned, therefore, be sure to

observe it.
Keep this manual handy for your quick reference in necessary.



WARNING

CAUTION

CAUTION

Otherwise, noi
malfunction.

or fatal injury or considerable loss of property.

to result in severe or slight injury or a loss of property.

CAUTION



specifications



degradation of the module.



and fixed.



cause malfunction, disorder or falling.

Safety Precautions

Wiring Precautions

nal, be sure to provide class 3 grounding which is dedicated

Before the PLC wiring, be sure to check the rated voltage and terminal arrangement for
the module and observe them correctly. If a different power, not of the rated voltage, is

Fasten the terminal screws firmly to the defined torque. If loosely fasten, it can cause

should not enter into the module. It can

Test Run and Maintenance Precautions

the module from the

printed circuit board (PCB), or remodel

ey can cause disorder,

malfunction, damage of the module or a

When mounting or dismounting the
module, perform them after the power

Waste Disposal Precautions

 When grounding a FG termi

to the PLC.



applied or wrong wiring is provided, it can cause a fire or disorder of the module.



short circuit, a fire or malfunction.

 Be careful that any foreign matter like wire scraps

cause a fire, disorder or malfunction.

CAUTION

CAUTION

 Do not contact the terminals while the

power is applied. It can cause
malfunction.

 When cleaning or driving a terminal

screw, perform them after the power
has been turned off.

 Do not perform works while the power

is applied, which can cause disorder
or malfunction.

WARNING

 Do not separate

the module. Th

fire.



has been turned off.

CAUTION

 When disposing the module, do it as an industrial waste.

CONTENTS

◎

◎

Chapter 1. INTRODUCTION

1.1 Features·································································································································································1-1

1.2 Terminology··························································································································································1-2

1.2.1 Analog Value : A ··················································································································································1-2

1.2.2 Digital Value : D···················································································································································1-2

1.3 Analog to Digital Conversion Characteristics ····················································································1-3

1.3.1 Voltage input························································································································································1-3

1.3.2 Current input························································································································································1-5

Chapter 2. SPECIFICATIONS

2.1 General Specifications ··································································································································2-1

2.2 Performance Specifications ·······················································································································2-2

2.3 Names of Parts and Functions ··················································································································2-4

2.3.1 G3F-AD3A ·························································································································································2-4

2.3.2 G4F-AD3A ·························································································································································2-5

2.3.3 G6F-AD2A ·························································································································································2-6

2.4 I/O Conversion Characteristics ·················································································································2-7

2.4.1 Voltage Input Characteristics ··························································································································2-8

2.4.2 Current Input Characteristics ··························································································································2-10

2.4.3 Simultaneous Voltage and Current Input Characteristics ················································································2-11

2.4.4 Analog input and Digital output characteristics ·······························································································2- 12

2.5 Processing Specification······························································································································2-13

2.5.1 Sampling processing A/D conversion system ···································································································2- 13

2.5.2 Averaging processing A/D conversion system ·································································································2-13

Chapter 3. INSTALLATION AND WIRING

3.1 Installation ··························································································································································3-1

3.1.1 Installation Ambience··········································································································································3-1

3.1.2 Handling Precautions ········································································································································3-1

3.2 Wiring ···································································································································································3-2

3.2.1 Wiring Precautions ············································································································································3-2

3.2.2 Wiring Examples ···············································································································································3-2

Chapter 4. FUNCTION BLOCK

4.1 Registration of the Function Block for the A/D Conversion Module on the GMWIN ·········4-1

4.2 Function Block for Local································································································································4-2

4.2.1 Module Initialization ···········································································································································4 -2

4.2.2 Module Reading - Array Type ···························································································································4-4

4.2.3 Module Reading - Single Type····························································································································4-5

4.3 Remote Function Block ································································································································4-6

4.3.1 Module Initialization ···········································································································································4 -6

4.3.2 Module Reading ··················································································································································4-8

4.4 Errors on Function Block ··························································································································4-10

Chapter 5. GM PROGRAMMING

5.1 Programming for Distinction of A/D Conversion Value····································································5-1

5.2 Programming for Display of A/D Conversion Value and Error Code on BCD Display...·····5-5

5.3 Programming for Loading the A/D Conversion Module on Remote I/O Station ··················5-8

Chapter 6. Buffer Memory

6.1 The configuration of buffer memory·········································································································6-1

6.1.1 G6F-AD2A···························································································································································6-1

6.1.2 G3F-AD3A / G4F-AD3A ······································································································································6-2

6.2 The contents and description of buffer memory·················································································6-3

6.2.1 G6F-AD2A···························································································································································6-3

6.2.2 G3F-AD3A / G4F-AD3A······································································································································6-8

Chapter 7. Buffer read/write instructions

7.1 Buffer read instructions··································································································································7-1

7.1.1 GET/GETP instruction·········································································································································7-1

7.1.2 RGET instruction·················································································································································7-3

7.2 Buffer write instructuins·································································································································7-6

7. 2.1 PUT/PUTP instruction ·········································································································································7-6

7. 2.2 RPUT instruction·················································································································································7-8

Chapter 8. MK Programming

8.1 Basic Programming ········································································································································8-1

8.1.1 G6F-AD2A ·························································································································································8-1

8.1.2 G3F-AD3A / G4F-AD3A ····································································································································8-2

8.2 Example Programming ·································································································································8-3

8.2.1 A program for comparision of A/D conversion value ························································································8-3

8.2.2 Output the analog input value by 7-segment display ·······················································································8-5

8.2.3 An A/D module mounted on a remote station ·····································································································8-7

Chapter 9. DIMENSIONS

9.1 G3F-AD3A Dimensions ·································································································································9-1

9.2 G4F-AD3A Dimensions ·································································································································9-2

9.3 G6F-AD2A Dimensions ·································································································································9-3

Chapter 1 Introduction

1 Introduction

The G3F-AD3A, G4F-AD3A, and G6F-AD2A modules are analog-to -digital conversion
modules for use with the GLOFA PLC GM1/2/3/4/6 series and MASTER-K PLC
K200S/300S/1000S series. The G3F-AD3A is used with GM1/2/3 series and K1000S
series, G4F-AD 3A is used with GM4 series and K300S series, and G6F -AD2A is used
with GM6 series and K200S series. (Hereafter the G3F-AD3A, G4F-AD3A, and G6F­AD2A modules are called as the A/D conversion module)

The A/D conversion module is to convert an analog input sig nal (voltage or current) from
external devices into a 12-bit signed binary digital value.

1.1 Features

1) Multi-channel analog to digital conversion is possible with a single A/D module.

- G6F-AD2A : 4 channels

- G4F-AD3A and G3F-AD3A : 8 channels

2) The select of voltage input or current input is possible by channel of A/D module.

3) The unlimited number of A/D modules can be mounted on a base board.
The maximum number of A/D modules depends on the power capacity of power supply
module.( In case of use to the G6F-AD2A with G6F -DA2V and G6F-DA2I, it is depends

on the power capacity of the GM6 -PAFB)

1-1

Chapter 1 Introduction

1.2 Terminology

1.2.1 Analog value : A

Analog value is a continuously changing value such as voltage, current, temperature,
speed pressure, flux, etc. Temperatur e, for example, is continuously changing according
to the time. Because this temperature itself is not available for input of the PLC, the
temperature should be converted an analog electrical signal by transducer. Moreover, the
converted analog signal (voltage or current) has to be converted into a digital value with
the A/D module because the PLC can handle only digital values.

value

time

Figure 1.1 Analog value

1.2.2 Digital value : D

Digital value is a discrete data that are described in numbers such as 0, 1, 2, … In
general, a binary code system that are consist of 0(off) and 1(on) is used for expressing
digital value. Also, BCD or hexadecimal values are used.

Because the CPU module of PLC can handle dig ital value only, the analog signal from
external devices should be converted into analog signals with A/D module.

In the other hand, the digital output of CPU module should be converted into analog
signal to be used for external devices. The D/A module (digital-analog converter) is used
for converting digital values into analog output (voltage or current).

value

time

Figure 1.2 Digital value

1-2

Chapter 1 Introduction

5V

Analog input voltage

1.3 Analog -to-Digital conversion characteristics

1.3.1 Voltage input

The A/D module converts the analog input from external devices to the digital value that
can be handled by CPU module.

When the analog input is voltage input, the K4F-AD3A and K7F-AD3A has two input
ranges such as 1 ~ 5VDC and 0 ~ 10VDC. The K3F-AD2A has three input range such as
1 ~ 5VDC, 0 ~ 10VDC, and –10 ~ 10VDC.

With all analog input range, the digital output is varied in the range of 0 ~ 4000. Therefore,
the resolution of the A/D module is obtained by following equation;

module A/DofResolution

=

−

voltage inputMinimumvoltageinputMaximum

4000

1) 1 ~ 5VDC range
When the A/D module operates with 1 ~ 5VDC range, the 1VDC analog input is

converted to digital 0, and the 5VDC analog input is converted into digital output 4000.
Therefore, the resolution per 1 digital value is 0.001VDC.

4000

2000

Digital output value

0

1V

2002

2001

2000

1999

1998

3V

2.998V

2.999V

Figure 1. 3 A/D conversion characteristics ( 1 ~ 5VDC )

3.000V

3.002V

3.001V

1-3

Chapter 1 Introduction

2) 0 ~ 10VDC range
When the A/D module operates with 0 ~ 10VDC range, the 0VDC analog input is

converted to digital 0, and the 10VDC analog input is converted into digital output 40 00.
Therefore, the resolution per 1 digital value is 0.0025VDC.

4000

2002

2001

2000

2000

Digital output value

0

0V

Analog input voltage

5V

10V

1999

1998

4.995V

5.000V

Figure 1.4 A/D conversion characteristic ( 0 ~ 10VDC )

3) –10 ~ 10VDC range
When the A/D module operates with –10 ~ 10VDC range, the 10VDC analog input is

converted to digital 0, and the 10VDC analog input is converted into digital output 4000.
Therefore, the resolution per 1 digital value is 0.005VDC.

5.005V

5.0025V4.9975V

4000

2002

2001

2000

Digital output value

2000

1999

0

-10V

0V

Analog input voltage

10V

1998

-0.010V

-0.005V

0.010V

0.005V

0.000V

Figure 1.5 A/D conve rsion characteristic ( -10 ~ 10VDC )

1-4

Chapter 1 Introduction

1.3.2 Current input

When the analog input is current input, the A/D conversion module has only one input
ranges such as 4 ~ 20mA.

With all analog input range, the digital output is varied in the range of 0 ~ 4000. Therefo re,
the resolution of the A/D module is obtained by following equation;

moduleA/DofResolution

=

−

currentinputMinimumcurrentinputMaximum

4000

1) 4 ~ 20mA range
When the A/D module operates with 4 ~ 20mA range, the 4mA analog input is converted

to digital 0, and the 20mA analog input is converted into digital output 4000. Therefore,
the resolution per 1 digital value is 0.004mA.

4000

2000

Digital output value

0

4mA

12mA 20mA

Analog input current

2002

2001

2000

1999

1998

11.992mA

11.996mA

12.000mA

12.004mA

12.008mA

Figure 1.6 A/D conversion characteristic ( 4 ~ 20mA )

1-5

Chapter 2. SPECIFICATIONS

Operating ambient

temperature

Storage ambient

Operating ambient

humidity

10≤f∠57 Hz

57≤f≤150 Hz

9.8㎨ (1G)

10≤f∠57 Hz

57≤f≤150 Hz

4.9㎨(0.5G)

IEC 61131-2
IEC1000-4-3

Chapter 2 . SPECIFICATIONS

2.1 General Specifications

Table 2.1 shows the general specifications of GLOFA GM series and MASTER-K series.

Item Specifications Standard

0 ~ 55℃

temperature

Storage ambient

Humidity

Frequency Acceleration Amplitude

Vibration

Frequency Acceleration Amplitude

*Maximum shock acceleration: 147㎨ {15G}

Shocks

Noise immunity

Operating atmosphere Free from corrosive gases and excessive dust

Altitude for use Up to 2,000m
Pollution degree 2 or lower
Cooling method Self-cooling

*Duration time :11 ms
*Pulse wave: half sine wave pulse( 3 times in each of X, Y and Z directions )

Square wave impulse noise ±1,500 V

Electrostatic discharge Voltage :4kV(contact discharge)

Radiated electromagnetic field 27 ~ 500 MHz, 10 V/m

In case of occasional vibration Sweep count

- 0.075 mm

In case of continuos vibration

- 0.035 mm

Fast transient

&

burst noise

-25 ~ 70℃

5 ~ 95%RH, non-condensing

5 ~ 95%RH, non-condensing

-

-

Modules

Voltage 2 kV 1 kV 0.25 kV

All power

modules

Digital I/O s

( Ue≥ 24 V)

10 times in each

direction for

X, Y, Z

Digital I/Os

(Ue < 24 V)

Analog I/O s

communication

I/Os

IEC 61131-2

IEC 61131-2

LGIS

Standard

IEC 61131-2
IEC1000-4-2

IEC 61131-2
IEC1000-4-4

[Table 2.1 ] General specifications

REMARK

1) IEC(International Electrot echnical Commission)
: The international civilian organization which produces standards for electrical and electronics industry.

2) Pollution degree
: It indicates a standard of operating ambient pollution level.
The pollution degree 2 means the condition in which normally, only non-conductive pollution occurs.
Occasionally, however, a temporary conductivity caused by condensation shall be expected.

2 - 1

Chapter 2. SPECIFICATIONS

2.2 Performance Specifications

Table 2-2 shows performance specifications of A/D conversion modul e.

1) G3F -AD3A, G4F-AD3A

Analog

input

Maximum

resolution

Items

Specifications

G3F-AD3A G4F-AD3A

I/O points 16 points

Voltage

Current

- Adjust input selection switch for each channel on side of module.

Voltage/Current selection

Digital output - 16 bit binary value

1 ~ 5VDC 1 mV (1/4000)

0 ~ 10VDC 2.5 mV (1/4000)

DC 4 ~20mA

Overall Accuracy

( ON : Current, OFF : Voltage)

- Selection of voltage range by program

1 ~ 5 VDC (input resistance 600㏀)

0 ~ 10 VDC (input resistance 600㏀)

DC 4 ~ 20 mA (input resistance 250Ω)

4㎂ (1/4000)

±0.5% (accuracy to full scale)

Max . conversion speed 5.0 ms/channel

Max . absolute input Voltage : 15V, Current : 25mA

Number of analog input point 8 channels/module

Isolation

Terminals connected 20-point terminal block

Internal current consumption 0.5 A 0.5 A

Weight 310 280

Between input terminals and PLC: Photo coupler isolation

(Between channels : Non-isolated)

[Table 2.2] Performance Specifications

CAUTION

The manufacturer set value of A/D conversion module has been current input mode.

2 - 2

Chapter 2. SPECIFICATIONS

2) G6F-AD2A

Items Specifications

I/O points 16 points

Voltage

Analog

input

Current

Voltage/Current selection

1 ~ 5 VDC (input resistance 1㏁)

0 ~ 10 VDC (input resistance 1㏁)

-10 ~ 10VDC (input resistance 1㏁)

DC4 ~ 20 mA (input resistance 250Ω)

- Selection with Terminal
( It has to be connected between V and I terminal to select current. )

- Selection of voltage range by switch on the side of module

Digital output

1 ~ 5VDC 1 mV (1/4000)

Maximum

resolution

Overall Accuracy

Max . conversion speed 5.0 ms/channel

Max . absolute input Voltage : 15V, Current : 25mA

Number of analog input point 4 channels/module

Terminals connected 18-point terminal block

Current

Consumption

0 ~ 10VDC 2.5 mV (1/4000)

-10 ~10VDC 5 mV (1/4000)

DC 4 ~20mA

Isolation

+5VDC

+15VDC

-15VDC

Weight

- 12 bit binary value( -48 ~ 4047, -2048 ~ 2047)

-

Digital output value is selected by program.

4㎂ (1/4000)

±0.5% (accuracy to full scale)

Between input terminals and PLC: Photo coupler isolation

(Between channels : Non-isolated)

40mA
50mA
20mA

200g

[Table 2.2] Performance Specifications

CAUTION

The factory-set value of A/D conversion module has been current input mode.
The G6F-AD2A has to be used with the GM6-PAFB.

2 - 3

Chapter 2. SPECIFICATIONS

2.3 Names of Parts and Functions

The names of parts and functions of the A/D conversion module are shown as below.

2.3.1 G3F-AD3A

2 - 4

Chapter 2. SPECIFICATIONS

2.3.2 G4F-AD3A

No Description

←

RUN LED

Indicates the operating status of the G3F-AD3A and G4F-AD3A.
Selection switch of voltage/current

↑

1)The switch status at voltage selection
The switch locates off status.

2)The switch statues at current selection

The switch locates on status

2 - 5

Chapter 2. SPECIFICATIONS

1 23

J1

J1

J2

1

2

3

2.3.3 G6F-AD2A

No Description

←

RUN LED

Indicates the operating status of the G6F-AD2A.

Selection switch of voltage/current

↑

Analog Input Input Range Selection Switch

DC 1~5V

Voltage

DC 0~10V

DC-10~10V

Current DC 4~20mA

J2

1 2 3

J1

1 2 3

J2

J1

J2

2 - 6

Chapter 2. SPECIFICATIONS

2.4 I/O Conversion Characteristics

Digital

4000

3000

2000

0

0V

5V

10V1V3V

5V

Analog

-0.12V

3.808

0.952V

10.12V

20.192

㎃

5.048V

4047

-48

Input / Output (hereafter I/O) conversion characteristics are expressed with the angle of the line between
analog input(voltage and current) and matched digital value.
I/O conversion characteristics of the G3F-AD3A, G4F-AD3A are expressed with Fig 2.1, and I/O conversion

characteristics of the G6F-AD2A is expressed with Fig 2.2
The voltage or current input for a channel is selected by analog input selection switch and the value of
Offset / Gain can not be changed because it is fixed.

Practical analog input range

Output

Value

1000

Input

DC 0 ~ 10V
DC 1 ~ 5V
DC 4 ~ 20㎃

㎃

4 ㎃ 12㎃ 20 ㎃

REMARK

1. The analog output value of over 4047 or –48 is fixed as 4047 or –48.

2. Keep the input voltage and current not to exceed +15V and 25mA.

[Fig 2.1] I/O Conversion Characteristics

2 - 7

Chapter 2. SPECIFICATIONS

Input selection switch

- Off : Voltage

(This switch is located

On

Digital

1000

0V5V10V 1V3V

5V

Analog

-0.12V

-10.24V

0.952V

10.12V

10.24V

5.048V

48

3.808㎃20.192

2000

1000

0

2047

Practical analog input range

4047
4000

3000

Output

2000

Value

-1000

0

-

-10V

4㎃ 12 ㎃ 20㎃DC 4 ~ 20 ㎃

0V 10V

Input

-2000

-2048

DC 0 ~ 10V
DC 1 ~ 5V

DC-10 ~ 10V

[Fig 2.1] I/O Conversion Characteristics

REMARK

1. The analog output value of over 4047 or –48(2047 or –2048) is fixed as 4047 or –48(2047 or –2048).

2. Keep the input voltage and current not to exceed +15V and 25mA.

2.4.1 Voltage Input Characteristics

1) G3F -AD3A, G4F-AD3A

For voltage input, the corresponding input selection switch of each channel should be set to "off".

–

The voltage input range is selected in program.
Input selection switch has to be located at off.

(1)Voltage input range : DC 0 ~10V

Digital output value for input voltage is shown as follows.

1 2 3 4 5 6 7 8

on the side of module)

CH0 1234567 Number of channel

Analog input voltage (V)

- 0.12 0 2.5 5 7.5 10 10.12

㎃

Digital output value -48 0 1000 2000 3000 4000 4047

2 - 8

Chapter 2. SPECIFICATIONS

12

J2

1 2 3

11

12 1 2 3 J1

J2 1 2

3J1J2

(2)Voltage input range : DC 1 ~5V

Digital output value for input voltage is shown as follows.

Analog input voltage (V)

0.952 1 2 3 4 5 5.048

Digital output value -48 0 1000 2000 3000 4000 4047

2) G6F-AD2A

For voltage input, the corresponding input is selected by selection switch and selected input voltage range is
same through whole channels.

1) Voltage input range

: DC 1 ~5V

Digital output value for input voltage is shown as follows.

Analog input voltage (V)

0.952 1 2 3 4 5 5.048

Digital output value

-48 0 1000 2000 3000 4000 4047

-2048 -2000 -1000 0 1000 2000 2047

2)

Voltage input range :

DC 0

~ 10

V

Digital output value for input voltage is shown as follows.

Analog input voltage (V)

-0.12 0 2.5 5 7.5 10 10.12

Input range selection

switch

11

J1

1 2 3

1 2 3

Input range selection

switch

Digital output value

-48 0 1000 2000 3000 4000 4047

-2048 -2000 -1000 0 1000 2000 2047

3)

Voltage input range :

DC - 10

~ 10

V

Digital output value for input voltage is shown as follows.

Analog input voltage (V)

Input range selection

switch

-10.24 -10 -5 0 5 10 10.24

Digital output value

-48 0 1000 2000 3000 4000 4047

-2048 -2000 -1000 0 1000 2000 2047

2 - 9

Chapter 2. SPECIFICATIONS

On

- On : Current

(This switch is located

1 2 3

11

12 1 2

3

J1

J2

2.4.2

Current Input Characteristics

1) G3F-AD3A, G4F-AD3A

For current input, the corresponding input selection switch of each channel should be set to "on".

Input selection switch

1 2 3 4 5 6 7 8

CH0 1234567

on the side of module)

Number of channel

- Digital output value for input current is shown as follows.
Analog input current(㎃)

3.808 4 8 12 16 20 20.192

Digital output value -48 0 1000 2000 3000 4000 4047

2) G6F-AD2A
Digital output value for input voltage is shown as follows.

Analog input current (mA)

3.808 4 8 12 16 20 20.192

Digital output value

-48 0 1000 2000 3000 4000 4047

-2048 -2000 -1000 0 1000 2000 2047

It has to be connected between V and I terminal to select current.

Input range selection

switch

2 - 10

Chapter 2. SPECIFICATIONS

On

- On : Current

1

2

3

J1

J2

V+

I+

COM + Analog Input

V+

I+

COM + Analog Input

2.4.3

Simultaneous Voltage and Current Input Characteristics

1) G3F- AD3A, G4F-AD3A
For simultaneous voltage and current input, the input conversion switch of each channel is set to corresponding

voltage and current range.

Ex) Voltage input range: 0 to 3 Current input range: 4 to 7

Input selection switch

- Off : Voltage

1 2 3 4 5 6 7 8

CH 0 1234567

(제품의 좌측면에 위치)

채널 번호

- Digital output value for analog input is shown as follows..
Analog input

Voltage
(V)

Current

(mA)

0~10V
1~ 5V

4 ~ 20 mA

-0.12 0 2.5 5 7.5 10 10.12

0.952 1 2 3 4 5 5.048

3.808 4 8 12 16 20 20.192

Digital output value -48 0 1000 2000 3000 4000 4047

2) G6F-AD2A

For simultaneous use of voltage and current input, the available input voltage rage is 0 ~ 5VDC only.

Digital output value for analog input is shown as follows..

Analog input

Voltage DC1~ 5V

Current DC4 ~ 20mA

Digital output value

0.952 1 2 3 4 5 5.048

3.808 4 8 12 16 20 20.192

-48 0 1000 2000 3000 4000 4047

-2048 -2000 -1000 0 1000 2000 2047

Ex) channel for voltage : 0, channel for current : 1

Input Rage Selection Switch

Wiring Example

Voltage Input(Channel “0”) Current Input(Channel ”1”)

2 - 11

Chapter 2. SPECIFICATIONS

Analog input and Digital output

Analog input and digital output value

2000

2001

2002

2004

2005

2006

2007

2008

2009

Digital output value

2000

2001

2002

2004

2005

2006

2007

2008

2009

2.4.4 Analog input and Digital output characteristics

1) G3F-AD3A, G4F-AD3A

Digital output value

No

DC 0~10V 2.5 mV

ℵ

ℑ

ℜ

2) G6F-AD2A

Input

range

DC 1~5V 1mV

DC 4~20

㎃

Digital
output

value

0
~

4000

Resolution Analog input value

4 ㎂

3.000
~

3.001

12.000
~

12.004

5.000
~

5.0025

3.001
~

3.002

12.004
~

12.008

3.002
~

3.003

12.008
~

12.012

5.0025

5.005

3.003
~

3.004

12.012
~

12.016

~

② ③

3.004
~

3.005

12.016
~

12.020

3.005
~

3.006

12.020
~

12.024

5.005
~

5.0075

3.006

3.007

12.024

12.028

①

5.0075
~

5.010

3.007

3.008

~

~

3.008

12.028

~

~

12.032

~

3.009

12.032
~

12.036

3.009
~

3.010

12.036
~

12.040

③ ④

②

①

Digital

No Input range

Resolution Analog input value

output

value

DC-10~10V 5mV

ℵ

0 ~

DC 0~10V 2.5 mV

ℑ

4000

or

-2048

DC 1~5V 1mV

ℑ

~

2047

DC 4~20 ㎃

ℜ

4 ㎂

3.000
~

3.001

12.000
~

12.004

5.000
~

5.0025

3.001
~

3.002

12.004
~

12.008

0.000
~

0.005

3.002
~

3.003

12.008
~

12.012

5.0025

5.005

3.003
~

3.004

12.012
~

12.016

~

3.004
~

3.005

12.016
~

12.020

5.005

5.0075

3.005
~

3.006

12.020
~

12.024

~

3.006
~

3.007

12.024
~

12.028

0.005
~

0.010

3.007
~

3.008

12.028
~

12.032

5.0075

5.010

3.008
~

3.009

12.032
~

12.036

~

3.009
~

3.010

12.036
~

12.040

2 - 12

Chapter 2. SPECIFICATIONS

2.5 Processing specifications

2.5.1 Sampling processing A/D conversion system

The anal og values input to the channels designated for sampling processing by the CPU are
converted to digital output values one by one and the digital output values are stored in the
buffer memory.

As the A/D module scans each channel, the value appearing at the instant is written to the
buffer memory as a digital value. The timing of this sampling depends on the number of
channels used, and may be found from the following expression.

Process time = Number of channels used × Maximum conversion time (5 ms)

The process time when 4 channels is used, for example, will be 20 msec = 4 × 5 ms

2.5.2 Averaging processing A/D conversion system

The A/D module makes the A/D conversion for any channels to which averaging processing
has been specified from the CPU. Using a preset count, an average is calculated (excluding the
maximum value and the minimum value) and stored to the buffer memory. The preset count
can be set as 2 to 255 times.

The time in which the average value by this processing is stored in the buffer memory varies
with the number of channels used.

Processing time = Count setting × No. of channels × 5ms (Max conversion time)

The processing time when count value is 50 and 4 channels are used, for example, will be 50 ×
4 × 5ms = 1000ms.

2 - 13