Toshiba TC218, DA264 User Manual

UM-TS02∗∗∗-E026

PROGRAMMABLE CONTROLLER

PROSEC

T2-series

ANALOG I/O MODULES

AD268 / DA264 / TC218

USER’S MANUAL

TOSHIBA CORPORATION

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Important Information

Misuse of this equipment can result in property damage or human injury.
Because controlled system applications vary widely, you should satisfy yourself
as to the acceptability of this equipment for your intended purpose.
In no event will Toshiba Corporation be responsible or liable for either indirect
or consequential dam age or injur y that may result from the use of this equipment.

No patent liability is assumed by Toshiba Corporation with respect to use of
information, illustrations, circuits, equipment or ex amples of application in this
publication.

Toshiba Corporation reserves the right to make changes and improvements to this
publication and/or related products at any time without notice. No obligation shall be
incurred other than as noted in this publication.

This publication is copyrighted and contains proprietary material. No part of this book
may be reproduced, stored in a retrieval system, or transmitted, in any form or by any
means  elect r ical, mechanical, photocopying, recordi ng, or otherwise  without
obtaining prior written permission from Toshiba Corp oration.

© TOSHIBA Corpor ation 2001, A ll rights reserved

Publication number: UM-TS02∗∗∗-E026
1st edition December 2001, 2nd edition September 2002

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User’s Manual

1

Safety Precautions

The AD268, DA264, and TC218 are the analog input/output modules for Toshiba’s Programmable
Controller PROSEC T2-series (T2/T2E/T2N).
Read this manual thoroughly before using this module. Also, keep this manual and related manuals
so that you can read them anytime while this module is in operation.

Safety Sy m bols

The following safety symbols are used on the product and/or in the related manuals.
Pay attention to the information preceded by the following symbols for safety.

!

WARNING

!

CAUTION

Safety Pr ecau tion s

!

CAUTION

• Turn off power to the PLC (T2, T2E or T2N) and to this module (AD268, DA264 or TC218)
before removing or mounting this module. Failure to do so can cause electrical shock or
damage to this product.

• Read the Safety Precautions described in the T2, T2E or T2N User’s Manual before using
this module.

• Follow the instructions described in this manual and in the T2, T2E or T2N User’s Manual
when installing and wiring this module.

• This module has been designed for the T2/T2E/T2N. Use your AD268/DA264/TC218 only
on the T2-series PLC rack.

• These modules consume the internal 5 Vdc power as shown below.

AD268 ... 300 mA
DA264 ... 230 mA

TC218 ... 300 mA
Confirm that the total 5 Vdc consumed current per one power supply module is within the
limit (2.5 A). If it exceeds the limit, the T2/T2E/T2N cannot operate properly and this may
cause unsafe situation.

Indicates a potentially hazardous situation which, if not avoided, could
result in death or serious injury.

Indicates a potentially hazardous situation which, if not avoided, may
result in minor or moderate injury. It may also be used to alert against
unsafe p ractices.

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2

Analog I/O Modules (AD268 / DA264 / TC218)

About This Manual

About This Manual

This manual describes the specification and the operations of Toshiba's analog I/O modules
(AD268, DA264 and TC218) for PROSEC T2 series programmable controllers.
Read this manual carefully for your correct operation of these modules.

This manual consists in three parts.

Part 1 ... 8 channel analog input module AD268
Part 2 ... 4 channel analog output module DA264
Part 3 ... 8 channel thermocouple input module TC218

Related Manual

The following related manuals are available for your reference.

T2E User's Manual (UM-TS02E∗∗

∗∗∗∗

∗∗-E001)

This manual describes the configuration, specification, installation, wiring, and maintenance of
the basic hardware of the programmable controller T2E.
The functions of the T2E and how to use them, and the information necessary for creating user
program are also described.

T2N User's Manual (UM-TS02N∗∗

∗∗∗∗

∗∗-E001)

This manual describes the configuration, specification, installation, wiring, and maintenance of
the basic hardware of the programmable controller T2N.
The functions of the T2N and how to use them, and the information necessary for creating user
program are also described.

T-series Inst r uction Set (UM-TS03∗∗∗

∗∗∗∗∗∗

∗∗∗-E004)

This manual describes the detailed specifications of instructions for Toshiba's T-series
programmable controllers.

Note: In this manual, the T2 series programmable controllers (T2, T2E, and T2N) are called as

T2 for ease of explanation.

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User’s Manual

3

Table of Contents

Table of Contents

Safety Precautions ............................................................................................................ 1

About This Manual ............................................................................................................ 2

Part 1 8 Channel Analog Input Module AD268

1. Introduction …………….……………………………………………………………….… 8

1.1 AD268 functions ............………………..…………………….………………………… 8

1.2 External features …......…………………………………………………………………. 9

2. Specifications ….………………………………………………………………………... 10

2.1 Specif ication s .................…………….……………………………………………….. 10

2.2 Internal block diagram ………….......………………………………………………… 11

3. Input Type Setting ….........……………………………………………………………... 12

3.1 Jumper plug setting ........…………….……………………………………………….. 12

3.2 Parameter setting by software ….....………...……………………………………… 13

4. Wiring ………………..…………………………………………………………………… 14

4.1 Terminal arrangement …….......…………..…………………………………………. 14

4.2 Signal wiring …..………………………………………………………………………. 15

4.3 Wiring precautions ………...…………………………………………………………. 16

5. I/O Allocation and Programming …………………………………………………… 17

5.1 Allocatio n to the T2 registers ……………..…………………………………………. 17

5.2 A/D conversion data …….......................……………………………………………. 18

5.3 Programming ……................................……………………………………………. 23

6. Parameters ……..................…......…………………………………………………… 24

6.1 Memory map …...........………………………………………………………………… 24

6.2 Parameter setting procedure ….........……..………………………………………… 30

6.3 S ample program for settin g the parameters …..………………………………..… 31

7. Troubleshooting ….…....……………………………………………………………… 32

7.1 RAS information ……...............…........……………………………………………… 32

7.2 Troubleshooting ................................................................................................. 33

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4

Analog I/O Modules (AD268 / DA264 / TC218)

Table of Contents

Part 2 4 Channel Analog Output Module DA264

1. Introduction …………….……………………………………………………………….… 36

1.1 DA264 functions............………………..…………………….………………………… 36

1.2 External features…......…………………………………………………………………. 37

2. Specifications ….………………………………………………………………………... 38

2.1 Specif ication s .................…………….……………………………………………….. 38

2.2 Internal block diagram ………….......………………………………………………… 39

3. Output Type Setting ….........……………………………………………………………... 4 0

3.1 Parameter setting by software ….....………...……………………………………… 40

4. Wiring ………………..…………………………………………………………………… 41

4.1 Terminal arrangement …….......…………..…………………………………………. 41

4.2 Signal wiring …..………………………………………………………………………. 42

4.3 Wiring precautions ………...…………………………………………………………. 43

5. I/O Allocation and Programming …………………………………………………… 44

5.1 Allocatio n to the T2 registers ……………..…………………………………………. 44

5.2 D/A conversion data …….......................……………………………………………. 45

5.3 Programming ……................................……………………………………………. 50

6. Parameters …..................….…......…………………………………………………… 51

6.1 Memory map …...........………………………………………………………………… 51

6.2 Sample program to access the parameters …..……..…………………………..… 55

7. Troubleshooting ….…....……………………………………………………………… 56

7.1 RAS information ……...............…........……………………………………………… 56

7.2 Troubleshooting ................................................................................................. 56

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User’s Manual

5

Table of Contents

Part 3 8 Channel Thermocouple Input Module TC218

1. Introduction …………….……………………………………………………………….… 60

1.1 TC218 functions............………………..…………………….………………………… 60

1.2 External features…......…………………………………………………………………. 61

2. Specifications ….………………………………………………………………………... 62

2.1 Specif ication s .................…………….……………………………………………….. 62

2.2 Internal block diagram ………….......………………………………………………… 63

3. Input Type Setting ….........……………………………………………………………... 64

3.1 Jumper plug setting ........…………….……………………………………………….. 64

3.2 Parameter setting by software ….....………...……………………………………… 65

4. Wiring ………………..…………………………………………………………………… 66

4.1 Terminal arrangement …….......…………..…………………………………………. 66

4.2 Signal wiring …..………………………………………………………………………. 67

4.3 Wiring precautions ………...…………………………………………………………. 68

5. I/O Allocation and Programming …………………………………………………… 69

5.1 Allocatio n to the T2 registers ……………..…………………………………………. 69

5.2 A/D conversion data …….......................……………………………………………. 70

5.3 Programming ……................................……………………………………………. 74

6. Parameters …..................….…......…………………………………………………… 75

6.1 Memory map …...........………………………………………………………………… 75

6.2 Parameter setting procedure ….........……..………………………………………… 81

6.3 S ample program for settin g the parameters …..………………………………..… 82

7. Troubleshooting ….…....……………………………………………………………… 83

7.1 RAS information ……...............…........……………………………………………… 83

7.2 Troubleshooting ................................................................................................. 84

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6

Analog I/O Modules (AD268 / DA264 / TC218)

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User’s Manual

7

Part 1

8 Channel Analog Input Module

AD268

1. Introduction, 8

2. Specifications, 10

3. Input Type Setting, 12

4. Wiring, 14

5. I/O Allocation and Programming, 17

6. Parameters, 24

7. Troubleshooting, 32

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Analog I/O Modules (AD268 / DA264 / TC218)

1. Introduction

PART 1 AD268

1. Introduction

The AD268 is an 8 channel analog input module for the T2 series programmable controllers.
The AD268 converts external analog signals (voltage or current) into digital values cyclically so
that the T2 can process the analog signals.

1.1 AD268 Functions

The AD268 has the following functions.

1) 8 channels input per module

2) Selectable input type

• ±5V

• ±10V

• 0 to 5V

• 0 to 10V

• 1 to 5V

• 0 to 20mA

• 4 to 20mA

3) 16-bit high-resolution A/D conversion

4) High-speed (1ms/channel) conversion cycle

5) Gain and offset calibration function

6) Input data averaging function

7) Unused channel skip function

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User’s Manual

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PART 1 AD268

1. Introduction

1.2 External features

Model type AD268
Status indication LED

Analog input terminal

External power supply connection terminal
Line ground and Frame ground terminal

Terminal block fixing scr ew
2-points

Removable terminal block

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Analog I/O Modules (AD268 / DA264 / TC218)

2. Specifications

PART 1 AD268

2. Specifications

This section describes the AD268 specifications.
The general specification for the AD268 conforms to the specification for the T2 PLC.

2.1 Specifications

Item AD268

Input type Voltage input Current input

-5 to 5V

Bipolar

-10 to 10V
0 to 5V 0 to 20mA
0 to 10V

Input range

Unipolar

1 to 5V 4 to 20mA

Input impedance

1MΩ or more 250Ω
Number of input channels 8 channels
I/O allocation type X 8W (8 input registers XW are assigned)
Resolution 16-bit

Overall accuracy

±0.2% FS (at 25°C)

±0.5% FS (0 to 55°C) (FS: ±10V)

Temperature drift

±100ppm/°C or less
Conversion cycle Approx. 1ms/channel (Approx. 8m s/8 channels)
Insulation resistance

10MΩ or more

Withstand voltage

1500Vac - 1 minute (between logic and analog circuits)

500Vac - 1 minute (betw een analog circuit and external 24V)

1500Vac - 1 minute (betw een analog circuit and FG/LG)

Status indication 1 green LED (On when normal)

Special function

Gain and offset calibration function

Input data averaging function

Unused channel skip function

External 24Vdc power voltage drop detection
External power supply

24Vdc ±10% - 120mA
Internal 5Vdc current
consumption

300mA or less
External connection 20-pin removable terminal block

Weight Approx. 300g

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User’s Manual

11

PART 1 AD268

2. Specifications

2.2 Internal block diagram

The AD268 performs the following operations.
The external analog signals come to th e buffer am plifier through the filter. The multiplexer
sequentially selects CH1 to CH8 to convert the input analog signals into digital data via the A/D
converter. The convert ed digital data reaches to the internal control circuit through optical
isolator. Every time when the T2 CPU requests to read the converted data, the internal control
circuit sends the data to the T2 CPU. The AD268's parameters are stored in the EEPROM.

Filter

Buffer

Multiplexer

1

3

2

Jumper

Filter

Buffer

1

3

2

Jumper

A/D conversion

Optical isolat ion

CH1

P

N

Internal control ci r cui t

CH8

P

N

Filter

DC/DC

converter

Voltage

check

circuit

Regulator

+5V
+15V

-15V

AG

P24

COM

LG

FG

EEPROM

LED

T2 CPU

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12

Analog I/O Modules (AD268 / DA264 / TC218)

3. Input Type Setting

PART 1 AD268

3. Input Type Setting

The AD268 supports multiple input ranges, ±5V, ±10V, 0 to 5V, 0 to 10V, 1 to 5V, 0 to 20mA,
or 4 to 20mA. The input range is selected by jumper plug setting and the parameter writing by
the T2 program .

The general flow for setting the input type is as follows.
(1) Set the jumper plugs to select voltage input or current input.

(2) Mount the AD268 onto the T2 rack.
(3) Turn on power to the T2 system.
(4) Execute I/O alloc ati on.
(5) Program the "input type setting program". (see t he next page)
(6) Turn the T2 to RUN mode.

3.1 Jumper plug setting

8 jumper plugs are provided on the AD268 board.
The jumper plug setting is for selecting either voltage input or current input.

JP1 is for channel 1, JP2 is for channel 2, ... JP8 is for channel 8.

Jumper plugs (JP1 to JP8)

1

3

Set the jumper plugs for each channel.

Side 1: Voltage input
Side 3: Current input

The fa ctory setting is voltage input (side 1).

•Use a pair of tweezers to set the jumper plug.

•Pay attention not to touch the components on

the board other than the jumper plug.

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User’s Manual

13

PART 1 AD268

3. Input Type Setting

3.2 Parameter setting by software

The input range of the AD268 is specified by writing the following parameter data into the
AD268's buffer memory. To access the buffer memory, T2 user program (READ and WRITE
instructions) is required.
When the parameter is set to the AD268, it is saved in the AD268's built-in EEPROM.
Therefore, once the input type parameter is set, there is no need to execute the input type
setting operation.

T2 CPU AD268

Input type parameter data:

Input typeParameter

data

Voltage input Current input
0 0 to 5V 0 to 20mA
1 0 to 10V
2 1 to 5V 4 to 20mA
4

±5V

5

±10V

AD268 buffer memory address:

H8018 Input type for channel 1
H8019 Input type for channel 2
H801A Input type for channel 3

H801B Input type for channel 4
H801C Input type for channel 5
H801D Input type for channel 6
H801E Input type for channel 7
H801F Input type for channel 8

The fact o ry se tting is

±10V range.

For details of the procedure to set the input type parameter, refer to section 6.

Buffer memory

User program

WRITE

READ

EEPROM

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14

Analog I/O Modules (AD268 / DA264 / TC218)

4. Wiring

PART 1 AD268

4. Wiring

4.1 Terminal arrangement

AD268 terminal block

11P

1N 2

32P

2N 4

53P

3N 6

74P

4N 8

95P

5N 10

11 6P

6N 12

13 7P

7N 14

15 8P

8N 16

17 P24

COM 18

19 LG

FG 20

Terminal

No.

Signal

name

Function

11P
21N

Channel 1 input

32P
42N

Channel 2 input

53P
63N

Channel 3 input

74P
84N

Channel 4 input

95P

10 5N

Channel 5 input

11 6P
12 6N

Channel 6 input

13 7P
14 7N

Channel 7 input

15 8P
16 8N

Channel 8 input

17 P24 External 24Vdc power (+)
18 COM External 24Vdc power (-)
19 LG Line filter ground
20 FG Frame ground

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User’s Manual

15

PART 1 AD268

4. Wiring

4.2 Signal wiring

Voltage input

Current input

External 24Vdc power supply

+15V

AG -15V

nP

nN

Internal circuit

Shielded twisted-pair cable

n : Channe l number (1 to 8)
AG : Analog ground
FG : Frame ground

AG

250



+

-

V

Set the jumper

plug to Side 1

1
2

3

Voltage source

AD268

+15V

AG -15V

nP

nN

Internal circuit

Shielded twisted-pair cable

n : Channe l number (1 to 8)
AG : Analog ground
FG : Frame ground

AG

250



+

-

↑↑↑↑

Set the jumper

plug to Side 3

1
2

3

Current source

AD268

P24

COM

Internal circuit

Normally connect LG and FG,
then connect to ground. (a)
However, depending on the
condition, connect groundi ng
individually by opening LG and
FG. (b)

AD268

LG

FG

+

-

24Vdc ±10%

(b) (a)

DC/DC

converter

+15V

-15V

AG

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16

Analog I/O Modules (AD268 / DA264 / TC218)

4. Wiring

PART 1 AD268

4.3 Wiring precautions

(1) Use shielded twisted-pair cables for analog input signal lines and wire them in shortest

distance. Connect the cable shield to ground in shortest distance for EMC conformity.
Normally the grounding method (a) is recommended. However, depending on the condition,
method (b) or (c) may be useful for stable operation.

(2) Separate the analog signal cable from other cables to prevent noise interference. (200mm

or more)

(3) This module requires 24Vdc power. Apply the 24Vdc power before (or at the same time)

applying T2’s main power. Otherwise, this module detects the external 24Vdc error.

(4) If the external 24Vdc power for this module is not stable, the converted data will not be

stable. In this case, use a dedicated 24Vdc power supply for this module.

(5) It is recommended to short the unused channels. Because if it is open for voltage input,

meaningless A/D conversion data will appear.

(6) If the converted data is not stable owing to electrical noise, it is recommended to use the

input averaging function to reduce the noise interference. For the averaging function, refer
to section 6.

Analog input

module

FG

(a)

Analog input

module

FG

(b)

Analog input

module

FG

(c)

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User’s Manual

17

PART 1 AD268

5. I/O Allocation and Programming

5. I/O Allocation and Programming

5.1 Allocation to the T2 registers

The I/O type of the AD268 is "X 8W".
When the automatic I/O allocation operation is performed with a AD268 mounted on the rack,
the AD268 is allocated as "X 8W".
The AD268 occupies the 8 consecutive input (XW) registers of the T2.
In this manual, these assigned I/O registers are expressed as XW(n), XW(n+1), ... XW(n+7).

The following figure shows an example of I/O allocation window of the T-PDS programming
software. In this case, the AD268 is mounted in the slot 0 of base unit BU218.

In the above example, the AD268 is allocated on the unit-0, slot-0. And 8 I/O registers, XW000
to XW007 are assigned to the AD268.

PS261

PU234E

No slot

DI32

Vacant

DO32

AD268

Vacant

Vacant

Vacant

Vacant

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Analog I/O Modules (AD268 / DA264 / TC218)

5. I/O Allocation and Programming

PART 1 AD268

5.2 A/D conversion data

The analog signals received by the AD268 are converted into the digital data in this module.
These con verted digital data are read by T2 CPU in the batch I/O processing and stored in the
assigned input registers as follows.

XW(n) ........ A/D conversion data for channel 1

XW(n+1) .... A/D conversion data for channel 2

XW(n+2) .... A/D conversion data for channel 3

XW(n+3) .... A/D conversion data for channel 4

XW(n+4) .... A/D conversion data for channel 5

XW(n+5) .... A/D conversion data for channel 6

XW(n+6) .... A/D conversion data for channel 7

XW(n+7) .... A/D conversion data for channel 8

The conversion data stored in the XW register is dependent on the input type as follows.

±±±±10V range:

A/D conversion data

Input voltage

Hexadecimal Integer

Resolution

Upper limit +10. 2 V H7F80 32640

:: :

Full scale (positive) +1 0 V H7D00 32000

:: :

+0.3125 mV H0001 1

0 0 V H0000 0

-0.3125 mV HFFFF -1
:: :

Full scale (negative) - 10 V H8300 -32000

:: :

Lower limit -1 0 . 2 V H8080 -32640

0.3125 mV / bit

+10.2V

HC000

-16384

0

H3FFF

16383

+10V

H7D00
32000

+5.1196V-5.12V-10.2V

-10V

H8300

-32000

Digital value

Analog input

D = 3200 × A

D: Digital dat a
A: Analog signal (V)

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User’s Manual

19

PART 1 AD268

5. I/O Allocation and Programming

±±±±5V ra nge :

A/D conversion data

Input voltage

Hexadecimal Integer

Resolution

Upper limit +5 .1196 V H3FFF 16383

:: :

Full scale (positive) +5 V H3E80 16000

:: :

+0.3125 mV H0001 1

0 0 V H0000 0

-0.3125 mV HFFFF -1
:: :

Full scale (negative) -5 V HC180 -16000

:: :

Lower limit -5 . 1 2 V HC000 -16384

0.3125 mV / bit

HC000

-16384

0

H3FFF

16383

+5V

H3E80
16000

+5.1196V-5.12V

-5V

HC180

-16000

Digital value

+10.2V-10.2V

Analog input

Upper limit

Lower limit

D = 3200 × A

D: Digital dat a
A: Analog signal (V)

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20

Analog I/O Modules (AD268 / DA264 / TC218)

5. I/O Allocation and Programming

PART 1 AD268

0 to 10V range:

A/D conversion data

Input voltage

Hexadecimal Integer

Resolution

Upper limit +10. 2 V H7F80 32640

:: :

Full scale (positive) +1 0 V H7D00 32000

:: :

+0.3125 mV H0001 1

0 0 V H0000 0

0.3125 mV / bit

D = 3200 × A

D: Digital dat a
A: Analog signal (V)

0

H3FFF

16383

Analog input

+5.1196V

Digital value

+10.2V

H7D00

32000

-10.2V

+10

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User’s Manual

21

PART 1 AD268

5. I/O Allocation and Programming

0 to 5V / 0 to 20mA range:

Input voltage/current A/D conversion data

0 t o 5 V 0 t o 2 0 mA Hexadecimal Integer

Resolution

Upper limit +5.1196 V +20.479 mA H3FFF 16383

:: : :

Full scale (positive) +5 V +2 0 mA H3E80 16000

:: : :

+0.3125 mV +0.00125 mA H0001 1

0 0 V 0 mA H0000 0

0.3125 mV / bit

1.25 µA / bit

0 to 20mA range:

D = 800 × A

D: Digital dat a
A: Analog signal (mA)

0

H3FFF

16383

Analog input

+5.1196V

20.479mA

Digital value

+10.2V

H3E80

16000

-10.2V

Upper limit

Lower limit

+5V

20mA

0 to 5V range:

D = 3200 × A

D: Digital data
A: Analog signal (V)

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22

Analog I/O Modules (AD268 / DA264 / TC218)

5. I/O Allocation and Programming

PART 1 AD268

1 to 5V / 4 to 20mA range:

Input voltage/current A/D conversion data

1 t o 5 V 4 t o 2 0 mA Hexadecimal Integer

Resolution

Upper limit +5.1196 V +20.479 mA H337F 13183

:: : :

Full scale (positive) +5 V +2 0 mA H3200 12800

:: : :

+1.0003125 V +4.00125 mA H0001 1

Lower limit 1 V 4 mA H0000 0

0.3125 mV / bit

1.25 µA / bit

4 to 20mA range:

D = 800 × A - 3200

D: Digital dat a
A: Analog signal (mA)

1 to 5V range:

D = 3200 × A - 3200

D: Digital dat a
A: Analog signal (V)

0

Analog input value

+5.1196V

20.479mA

Digital value

+10.2V-10.2V

Upper limit

Lower limit

+5V

20mA

H3200

12800

H337F

13183

1V

4mA

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User’s Manual

23

PART 1 AD268

5. I/O Allocation and Programming

5.3 Programming

To read the A/D conversion data, there is no need to use special instruction. The A/D
conversion data are automatically stored in the assigned input registers (XW registers).

For example, when the AD268 is allocated to XW000 to XW007, the A/D conversion data of
each channel is stored as follows.

XW000 : Channel 1 A/D conversion data
XW001 : Channel 2 A/D conversion data
XW002 : Channel 3 A/D conversion data
XW003 : Channel 4 A/D conversion data
XW004 : Channel 5 A/D conversion data
XW005 : Channel 6 A/D conversion data
XW006 : Channel 7 A/D conversion data
XW007 : Channel 8 A/D conversion data

Therefore, in the us er program, you can use these XW registers directly for the analog data
processing.

The program shown below is an example of simple comparison with the channel 1 analog data.
(±10V setting)

Line 1: When XW000 is greater than 25600 (channel 1 analog input is more than 8V), R0100

is set to ON.

Line 2: When XW000 is in the range of -9600 to 9600 (channel 1 analog input is in the range

of -3V to 3V), R0101 is set to ON.

Line 3: When XW000 is less than -16000 (channel 1 analog input is less than -5V), R0102 is

set to ON.

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24

Analog I/O Modules (AD268 / DA264 / TC218)

6. Parame ters

PART 1 AD268

6. Parameters

The AD268 has the memory that stores the control parameters, input type designation, module
status information, etc. This memory is called the buffer memory. To access (read/write) this
memory from the T2 program, READ and WRITE instructions are used.

6.1 Memory map

The contents of the AD268's buffer memory are as fo llows.

Address Contents

F0

H8000 Gain calibration value for channel 1
H8001 Gain calibration value for channel 2
H8002 Gain calibration value for channel 3
H8003 Gain calibration value for channel 4
H8004 Gain calibration value for channel 5
H8005 Gain calibration value for channel 6
H8006 Gain calibration value for channel 7
H8007 Gain calibration value for channel 8
H8008 Offset calibration value for channel 1

H8009 Offset calibration value for channel 2
H800A Offset calibration value for channel 3
H800B Offset calibration value for channel 4
H800C Offset calibration value for channel 5
H800D Offset calibration value for channel 6
H800E Offset calibration value for channel 7
H800F Offset calibration value for channel 8

H8010 Averaging times for channel 1

H8011 Averaging times for channel 2

H8012 Averaging times for channel 3

H8013 Averaging times for channel 4

H8014 Averaging times for channel 5

H8015 Averaging times for channel 6

H8016 Averaging times for channel 7

H8017 Averaging times for channel 8

H8018 Input type setting for channel 1

H8019 Input type setting for channel 2
H801A Input type setting for channel 3
H801B Input type setting for channel 4
H801C Input type setting for channel 5
H801D Input type setting for channel 6
H801E Input type setting for channel 7
H801F Input type setting for channel 8

H8020 Command register

H8021 Response register

H8022

:

H8027

No use

Use WRITE instruction to write
data into these addresses.

Use READ instruction to read
data from this address.

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