Mitsubishi MELSEC A1S64AD Manuale utente

A/D Converter module

pe A1S64AD

User's Manual

(Hardware)

Thank you for buying the Mitsubishi general-purpose programmable

logic controller MELSEC-A Series

Prior to use, please read both this manual and detailed manual

thoroughly and familiarize yourself with the product.

MODEL A1S64AD(H/W)-U-E

MODEL

CODE 13JE46

IB(NA)-66485-D(0609)MEE

DANGER

CAUTION

zSAFETY PRECAUTIONS z

(Read these precautions before using.)

When using Mitsubishi equipment, thoroughly read this manual and the

associated manuals introduced in this manual. Also pay careful attention to

safety and handle the module properly.

These precautions apply only to Mitsubishi equipment. Refer to the CPU

module user's manual for a description of the PLC system safety precautions.

These zSAFETY PRECAUTIONSzclassify the safety precautions into two

categories: "DANGER" and "CAUTION".

Procedures which may lead to a dangerous condition

and cause death or serious injury if not carried out

properly.

Procedures which may lead to a dangerous condition

and cause superficial to medium injury, or physical

damage only, if not carried out properly.

Depending on circumstances, procedures indicated by CAUTION may also

be linked to serious results.

In any case, it is important to follow the directions for usage.

Store this manual in a safe place so that you can take it out and read it

whenever necessary. Always forward it to the end user.

[PRECAUTIONS FOR DESIGN]

CAUTION

zDo not bunch the control wires or communication cables with the main

circuit or power wires, or install them close to each other.

They should be installed 100mm (3.9inch) or more from each other.

Not doing so could result in noise that may cause malfunction.

[INSTALLATION PRECAUTIONS]

CAUTION

zUse the PC in an environment that meets the general specificaitons

contained in this manual. Using this PC in an environment outside the

range of the general specifications could result in electric shock, fire,

erroneous operation, and damage to or deterioration of the product.

zInstall so that the pegs on the bottom of the module fit securely into the

base unit peg holes.

The module fixing screws must be tighten by the specified torque.

Not installing the module correctly or tightening the screws to the terminal

base could result in erroneous operation, damage, or pieces of the product

falling.

[WIRING PRECAUTIONS]

CAUTION

zIf there are high levels of noise, ground the AG terminal and FG terminal with

Class D grounding (Class 3 grounding) or higher dedicated for the PLC.

Failure to observe this could lead to malfunctioning.

zWhen wiring in the PLC, be sure that it is done correctly by checking the product's

rated voltage and the terminal layout. Connecting a power supply that is different

from the rating or incorrectly wiring the product could result in fire or damage.

zTighten terminal screws to the specified torque.

If a terminal screw is not tightened to the specified torque, it the module may fall

out, short circuit, or malfunction.

If a terminal screw is tightened excessively, exceeding the specified torque, the

module may fall out, short circuit, or malfunction due to breakage of the screw or

the module.

zBe careful not to let foreign matters such as sawdust or wire chips get inside the

module. These may cause fires, failure or malfunction.

[STARTUP/MAINTENANCE PRECAUTIONS]

DANGER

zWhen power is on, do not touch the terminals.

Doing so can cause an electric shock or malfunction.

zBefore starting cleaning or terminal screw retightening, always switch off the

power externally in all phases.

Not switching the power off in all phases can cause a module failure or

malfunction.

CAUTION

zNever disassemble or modify the module.

Failure to observe this could lead to trouble, malfunctioning, injuries or fires.

zAlways turn the power OFF before installing or removing the module. Failure to

observe this could lead to module faults or malfunctioning.

zDo not install/remove the terminal block more than 50 times after the first use of

the product. (IEC 61131-2 compliant)

[PRECAUTIONS FOR DISPOSAL]

CAUTION

zDispose of this product as industrial waste.

About the Manuals

The following manuals are related to this product.

Refer to the following table, and procure these manuals as necessary.

Detailed Manual

Manual name Manual No.

(Model code)

A/D converter module type A1S64AD User’s Manual IB-66336

1. Outline

This manual explains the specifications and names of each part of the A1S64AD type

analog/digital converter (hereinafter, A1S64AD) used in combination with the

MELSEC-A Series PLC CPU module (hereinafter PLC CPU).

2. Performance Specifications

The performance specifications of the A1S64AD are shown below.

Item Specifications

Analog input

Voltage: -10 to 0 to +10VDC

(input resistance 1MΩ)

Current: -20 to 0 to +20mA

(input resistance 250Ω)

Select with the input

terminals.

Digital input 16-bit coded binary

-4096 to +4095 when set to 1/4000

-8192 to +8191 when set to 1/8000

-12288 to +12287 when set to 1/12000

Digital output value

(At 5V/20mA gain, 0V/90mA offset)

Analog input

1/4000 1/8000 1/12000

Input/output

characteristics *1

+10V

+5V or +20mA

0V or 0mA

-5V or -20mA

-10V

+4000

+2000

-2000

-4000

+8000

+4000

-4000

-8000

+12000

+ 6000

-6000

-12000

1/4000 1/8000 1/12000

Maximum

resolution Voltage input

Current input

2.5mV

10μA

1.25mV

5μA

0.83mV

3.33μA

General accuracy

*2 Within ±1% ±40 ±80 ±120

Maximum

conversion speed 20ms/channel

Maximum

absolute input Voltage ±15V Current ±30mA

No. of analog

input points 4 channels/module

Specific

isolated area

Isolation

method

Dielectric

withstand

voltage

Insulation

resistance

Between input

terminal and

PLC power

supply

Photocoupler

isolation

500V AC

for

1 minute

5MΩor more

(measured with a

500V DC insulation

resistance tester)

Between

channels Not isolated - -

Isolation

specifications

Item Specifications

No. of occupied

input/output points Special 32 points

Connection

terminal 20-point terminal block

External power

supply Not required

Applicable wire

size 0.75 to 1.5mm2

Applicable crimp

terminal 1.25-3, 1.25-YS3, V1.25-3, V1.25-YS3A

Internal current

consumption

(5VDC)

0.4A

Weight 0.25kg

*1: The gain is set to 5V and the offset to 0V as the default.

*2: This is the accuracy in respect to the maximum digital output value. The maximum

digital value is the maximum value of the selected resolution. It is the same for

either a current input or voltage input.

Point

The range of the analog input at the which maximum resolution and general

accuracy can be tolerated is as follows.

Voltage -10 to 0 to +10V

Current -20 to 0 to +20mA

Refer to the User's Manual for the PLC CPU in use for details on the general

specifications.

3. Names and Settings of Each Part

3.1 Names of each part

The names of each A1S64AD part are shown below.

A1S64AD

RUN

OFFSET

GAIN

TEST

V+

I+

COM

SLD

V+

I+

A.G

COM

SLD

V+

I+

COM

SLD

V+

I+

COM

SLD

No. Name Details

1) RUN LED

RUN

The operation state of the A1S64AD is indicated.

yNormal mode

ON : In normal operation

Flickering: Write data error has occurred.

OFF : 5V power OFF or watch dog timer error

yTest mode

ON : OFF SET switch or GAIN switch is ON

OFF : OFF SET switch and GAIN switch are

both OFF

2) CHANNEL selection

switch

The channel for adjusting the offset and the gain is

selected.

(Channels other than 1 to 4 have no process.)

3) OFF SET switch

OFF SET

By setting the switch to the OFF SET side, the

analog input value at that time will be saved by the

A1S64AD as the offset value.

4) GAIN switch

GAIN

By setting the switch to the GAIN side, the analog

input value at that time will be saved by the

A1S64AD as the gain value.

5) Test mode terminal

TEST

Short-circuit across terminals 1 and 2 when setting

the offset or gain.

3.2 Setting the offset and gain

Follow the procedure below to change the input/output conversion characteristics.

Start

Short-circuit the test mode terminal

(across 1-2)

Set the "channel selection switch"

to the channel to be changed.

Apply the voltage or current to be

set as the offset value.

TEST

RUN

V+

COM

I+

V+

COM

For voltage

For current

Actually connected resistance value

RUN OFF SET

Set the offset switch to "OFF SET".

OFF

Set to

channel

to be set.

End

Release the test mode terminal

(across 1-2).

Adjust any other

channels?

YES

Apply the voltage or current to be

set as the gain value.

Set the gain switch to "GAIN".

For voltage

For current

V+

COM

I+

V+

COM

Actually connected resistance value

RUN GAIN

TEST

Remarks

The offset value and gain value have the following meanings.

(1) The offset value is the analog input value (voltage or current) at which the digital

output value is "0".

(2) The gain value is the analog input value (voltage or current) at which the digital

output value is the following:

(a) 2000 (1/4000 resolution)

(b) 4000 (1/8000 resolution)

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