Toshiba AD268 User Manual

UM-TS02∗∗∗-E026

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PROGRAMMABLE CONTROLLER

PROSEC

ANALOG I/O MODULES

AD268 / DA264 / TC218

USER’S MANUAL

T2-series

TOSHIBA CORPORATION

Important Information

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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 inju ry 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 applic ation 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 rical, mechanical, photocopying, recordi ng, or otherwise  without
obtaining prior written permission from Toshiba Corporation.

© TOSHIB A Corpor ation 2001, All rights reserved

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

Safety Precautions

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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 Symbols

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

• 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.

Indicates a potentially hazardous situation which, if not avoided, could
result in death o r 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 r actices.

!

CAUTION

• 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.

User’s Manual

1

About This Manual

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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∗∗

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∗∗

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 u ct ion Set (UM-TS03∗∗∗

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.

∗∗-E001)

∗∗∗∗

∗∗-E001)

∗∗∗∗

∗∗∗-E004)

∗∗∗∗∗∗

2

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

Table of Contents

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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 fea tures …......…………………………………………………………………. 9

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

2.1 Specifications .................…………….……………………………………………….. 10

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

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

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

3.2 Parameter setting b y 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 Alloca tio n to th e 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 Sample program for sett ing the parameters …..………………………………..… 31

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

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

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

User’s Manual

3

Table of Contents

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Part 2 4 Channel Analog Output Module DA264

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

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

1.2 External fea tures…......…………………………………………………………………. 37

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

2.1 Specifications .................…………….……………………………………………….. 38

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

3. Output Type Setting ….........……………………………………………………………... 40

3.1 Parameter setting b y 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 Alloca tio 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 S a mp le program to access the parameters …..……..…………………………..… 55

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

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

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

4

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

Table of Contents

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Part 3 8 Channel Thermocouple Input Module TC218

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

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

1.2 External fea tures…......…………………………………………………………………. 61

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

2.1 Specifications .................…………….……………………………………………….. 62

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

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

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

3.2 Parameter setting b y 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 Alloca tio n to th e 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 Sample program for sett ing the parameters …..………………………………..… 82

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

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

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

User’s Manual

5

6

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

Part 1

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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

User’s Manual

7

1. Introduction

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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

PART 1 AD268

8

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

PART 1 AD268

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1.2 External features

1. Introduction

Model type AD268
Status indication LED

Removable term inal block

Analog input terminal

External power supply connection terminal
Line ground and Frame ground terminal

Terminal block fixing screw
2-points

User’s Manual

9

2. Specifications

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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

Bipolar

Input range

Unipolar

Input impedance
Number of input channels 8 channels
I/O allocation type X 8W (8 input registers XW are assigned)
Resolution 16-bit

Overall accuracy
Temperature drift

Conversion cycle Approx. 1ms/channel (Approx. 8m s/8 channels)
Insulation resistance

Withstand voltage

Status indication 1 green LED (On when normal)

Special function

External power supply
Internal 5Vdc current

consumption
External connection 20-pin removable terminal block
Weight Approx. 300g

-5 to 5V

-10 to 10V
0 to 5V 0 to 20mA
0 to 10V
1 to 5V 4 to 20mA
1MΩ or more 250Ω

±0.2% FS (at 25°C)
±0.5% FS (0 to 55°C) (FS: ±10V)
±100ppm/°C or less

10MΩ or more

1500Vac - 1 minute (betw een logic and analog circuits)
500Vac - 1 minute (betw een analog circuit and external 24V)
1500Vac - 1 minute (betw een analog circuit and FG/LG)

Gain and offset calibration function
Input data averaging function
Unused channel skip function
External 24Vdc power voltage drop detection

24Vdc ±10% - 120mA
300mA or less

PART 1 AD268

10

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

PART 1 AD268

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2.2 Internal block diagram

Jumper

1

P

CH1

N

2

3

2. Specifications

Buffer

Filter

LED

CH8

COM

P24

LG

Multiplexer

Jumper

1

P

N

2

3

Filter

Filter

DC/DC

Buffer

Regulator

AG

converter

+5V
+15V

-15V

A/D conversion

T2 CPU

Internal control circuit

EEPROM

Optical isola t ion

FG

Voltage

check

circuit

The AD268 performs the following operations.
The external analog signals come to th e buffer amplifier through the filter. The multiplexer
sequentially selects CH1 to CH8 to convert the input analog signals into digital data via the A/D
converte r. Th e converte d 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.

User’s Manual

11

3. Input Type Setting

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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 all ocation.
(5) Program the "input type setting program". (see the nex t 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.

PART 1 AD268

Jumper plugs (JP1 to JP8)

Set the jumper plugs for each channel.

Side 1: Voltage input
Side 3: Current input

The fa ct o ry se tting 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.

1

3

12

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

PART 1 AD268

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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 requi red.
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

Buffer memory

WRITE

User program

READ

EEPROM

Input type parameter data:

Input typeParameter

data

0 0 to 5V 0 to 20mA
1 0 to 10V
2 1 to 5V 4 to 20mA
4
5

Voltage input Current input

±5V
±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 f or channel 8

The fa ctory setting is

±10V range.

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

User’s Manual

13

4. Wiring

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4. Wiring

4.1 Terminal arrangement

AD268 terminal block

1N 2

2N 4

3N 6

4N 8

5N 10

6N 12

7N 14

8N 16

COM 18

FG 20

PART 1 AD268

11P
32P
53P
74P

95P
11 6P
13 7P
15 8P
17 P24
19 LG

Terminal

No.

11P
21N
32P
42N
53P
63N
74P
84N

95P
10 5N
11 6P
12 6N
13 7P
14 7N
15 8P
16 8N
17 P24 External 24Vdc power (+)
18 COM External 24Vdc power (-)
19 LG Line filter ground
20 FG Frame ground

Signal

name

Function
Channel 1 input
Channel 2 input
Channel 3 input
Channel 4 input
Channel 5 input
Channel 6 input
Channel 7 input
Channel 8 input

14

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

PART 1 AD268

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4.2 Signal wiring

4. Wiring

Voltage input

Voltage source

+

V

-

Current input

Current source

+

↑↑↑↑

-

Shielded twisted-pair cable

Shielded twisted-pair cable

AD268

Set the jumper

plug to Side 1

1

nP

nN

AG -15V

Internal circui t

AD268

nP

nN

AG -15V

Internal circui t

2

3

250

AG

Set the jumper

plug to Side 3

1
2

3

250

AG

+15V



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

+15V



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

External 24Vdc power supply

+

24Vdc ±10%

-

(b) (a)

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

P24

COM

LG

FG

Internal circui t

+15V

DC/DC

converter

AG

-15V

User’s Manual

15

4. Wiring

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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.

Analog input

(a)

(b)

module

FG

Analog input

module

FG

PART 1 AD268

Analog input

(c)

module

FG

(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 converte d 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 I/O Modules (AD268 / DA264 / TC218)

16

PART 1 AD268

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5. I/O Allocation and Programming

5. I/O Allocation and Programming

5.1 Allocation to the T2 registers

The I/O type of th e AD268 is "X 8 W".
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.

DI32

PS261

PU234E

No slot

AD268

DO32

Vacant

Vacant

Vacant

Vacant

Vacant

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.

User’s Manual

17

5. I/O Allocation and Programming

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5.2 A/D conversion data

The analog signals received by the AD268 are converted into the digital data in this module.
These con v e rt e d digi tal 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:

PART 1 AD268

Input voltage

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

Digital value

H3FFF

16383

0

+5.1196V-5.12V-10.2V

Hexadecimal Integer

+10V

Analog input

+10.2V

A/D conversion data

H7D00
32000

D = 3200 × A

HC000

-16384

H8300

-32000

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

Resolution

0.3125 mV / bit

-10V

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

18

PART 1 AD268

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±±±±5V ra nge:

5. I/O Allocation and Programming

Input voltage

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

Digital value

H3FFF

16383

+5V

0

+5.1196V-5.12V

HC180

-16000
Lower limit

HC000

-16384

Hexadecimal Integer

Upper limit

Analog input

+10.2V-10.2V

A/D conversion data

H3E80
16000

Resolution

0.3125 mV / bit

D = 3200 × A

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

-5V

User’s Manual

19

5. I/O Allocation and Programming

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0 to 10V range:

PART 1 AD268

Input voltage

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

Digital value

H3FFF

16383

0

-10.2V

+5.1196V

Hexadecimal Integer

+10

Analog input

+10.2V

A/D conversion data

H7D00

32000

D = 3200 × A

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

Resolution

0.3125 mV / bit

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

20

PART 1 AD268

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0 to 5V / 0 to 20mA range:

5. I/O Allocation and Programming

Input voltage/current A/D conversion data

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

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

Digital value

+5V

20mA

0 to 5V range:

D = 3200 × A

D: Digital data
A: Analog signal (V)

0 to 20mA range:

Lower limit

-10.2V

H3FFF

16383

0

Upper limit

+5.1196V

20.479mA

H3E80

16000

Analog input

+10.2V

D = 800 × A

Resolution

0.3125 mV / bit

1.25 µA / bit

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

User’s Manual

21

5. I/O Allocation and Programming

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1 to 5V / 4 to 20mA range:

PART 1 AD268

Input voltage/current A/D conversion data

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

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

Digital value

+5V

20mA

1 to 5V range:

D = 3200 × A - 3200

H337F

13183

Lower limit

0

1V

4mA

Upper limit

Analog input value

+5.1196V

20.479mA

H3200

12800

+10.2V-10.2V

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

4 to 20mA range:

D = 800 × A - 3200

Resolution

0.3125 mV / bit

1.25 µA / bit

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

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

22

PART 1 AD268

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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 t he user 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.

User’s Manual

23

6. Parameters

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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 llo w s .

Address Contents

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

F0

No use

Use WRITE instruction to write
data into these addresses.

Use READ instruction to read
data from this address.

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

24

PART 1 AD268

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6. Parameters

Address Contents

F0

H8028 Analog input actual value for channel 1

H8029 Analog input actual value for channel 2
H802A Analog input actual value for channel 3
H802B Analog input actual value for channel 4
H802C Analog input actual value for channel 5
H802D Analog input actual value for channel 6
H802E Analog input actual value for channel 7
H802F Analog input actual value for channel 8

H8030 Module status for channel 1

H8031 Module status for channel 2

H8032 Module status for channel 3

H8033 Module status for channel 4

H8034 Module status for channel 5

H8035 Module status for channel 6

H8036 Module status for channel 7

H8037 Module status for channel 8

Use READ instruction to read
data from these addresses.

User’s Manual

25

6. Parameters

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Gain calibration value & Offset calibration value:

(Gain: H8000 to H8007, Offset: H8008 to H800F)
At the factory shipment, the AD268 is calibrated for each input range. Therefore, there is no

need for user to calibrate normally.
However, depending on the usage condition, field adjustments are required. For this purpose,
the AD268 has the gain and offset calibration function.

In the AD268, the A/D conversion data is calculated a s follows .

PART 1 AD268

Analog input

A/D

conversion

Offset

processing

Gain

processing

A/D conversion data
(read by T2 CPU)

When the gain calibration value is G and the offset calibration value is O, the conversion
calculation is performed in the AD268 as follows.

= (X1 + O) × G / FS

2

X

: Initial A/D conversi on value

1

X

: Gain/offset processed value

2

X
O: Offs et calibra t ion value (buf fer memory address H8008 to H800F)
G: Gain calibration va lue (buffer memory address H8000 to H8007)
FS: Full scale value

32000 for ±10V and 0 to 10V ranges
16000 for ±5V, 0 to 5V and 0 to 20mA ranges
12800 for 1 to 5V and 4 to 20mA ranges

The data setting range of the g ain and offset calibration value are as follows.

Input type Gain calibration value

±10V

0 to 10V

±5V

0 to 5V

0 to 20mA

1 to 5V

4 to 20mA

Upper limit 32000
Default value 32000
Lower limit 10000
Upper limit 16000
Default value 16000
Lower limit 5000
Upper limit 12800
Default value 12800
Lower limit 4000

Input type Offset cali br ation v alue

Upper limit 3200
Default value 0All types
Lower limit -3200

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

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6. Parameters

Averaging times:

(H8010 to H8017)
This parameter is for the averaging processing for the analog input data. The moving average

is calculated by the given averaging times parameter.
For example, if the averaging times parameter is 10, the average value of latest 10 times
conversion is output as the A/D conversion data.
This function is effective to reduce the fluctuation caused by noise.

The available setting range is as follows.

Input type Aver aging tim es

Upper limit 127
Default value 1All types
Lower limit 1

Input type setting:

(H8018 to H801F)
This parameter is used to select the input type. This parameter also has a function to skip the

A/D conversion for unused channels. By using the channel skip function, the conversion cycle
time can be reduced.

The available setting range is as follows.

Input type Setti ng value
0 to 5V 0 to 20mA 0
0 to 10V - 1
1 to 5V 4 to 20mA 2

±5V
±10V

Channel skip 128

-4

-5

The default setting value (factory setting) is 5 (±10V).

User’s Manual

27

6. Parameters

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Command register:

(H8020)
This register is used to issue the following commands to the AD268. To issue the command,

write the command value by usin g WRITE instruction.

Value Command Description

0 - Write 0 after the command processing is completed.

When this command is issued, the parameters written into

1 Parameter set

2 Reset command

The command register and the response register are used for hand-shaking. Refer to section

6.2 for the parameter setting procedure.

Response register:

(H8021)

the buffer memory are saved in the AD268 ’s EEPROM, and
the parameters become effective.
Used to reset the AD268 when some error has occurred.
However if the error is caused by hardware or external
conditi on, the reset command may not be effective .

PART 1 AD268

This register shows the AD268’s response for the command issued. Check the status of this
register us ing READ instruction.

Value Response Description

0 - The requested command is not yet completed.
1 Acknowledge

When the issued command is completed, the response
register comes 1.

The command register and the response register are used for hand-shaking. Refer to section

6.2 for the parameter setting procedure.

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

28

PART 1 AD268

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Analog input actual v al ue:

(H8028 to H802F)
These data show the original A/D conversion data before processing the gain and offset

calibration.

Module status:

(H8030 to H8037)
These data show the AD268’s operation status.

6. Parameters

Bit posit ion →

Bit Name Description

0 to 2 Input type Shows the input type.

3 to 5 - Reserved

6 Channel skip 1 when the channel skip is designated.
7 I nput type setting

8 Wire break 1 when wire breakage is detected. (Effective only for 4 to 20mA
9 Input limit 1 when the A/D conversion data is limited because of the range

A MPU error 1 when the AD268’s processor is not normal.
B ROM status 1 when the AD268’s EEPROM is not normal.
C DP-RAM status 1 when the AD268’s DP-RAM (buffer memory) is not nor mal.
D- Reserved
E External 24V error 1 when the external 24Vdc is not normal.
F Initializing 1 during the AD268 is in initialization process.

FEDCBA9876543210

0000

000 (0) = 0 to 5V/0 to 20mA
001 (1) = 0 to 10V
010 (2) = 1 to 5V/4 to 20mA
100 (4) = ±5V
101 (5) = ±10V

1 when the input type designation is invalid.

error

input)
over.

User’s Manual

29

6. Parameters

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6.2 Parameter setting procedure

When you change the AD268 parameters, such as input type settings, gain/offset calibrations
and averaging times, use the following procedure.

Step (1)

Write the value "0" into the command register of the AD268 buffer memory (address H8020)
by WRITE instruction.

PART 1 AD268

H8020 Command register

← Write 0

Step (2)

Write the parameter data into the buffer memory (addresses H8000 to H801F) by WRITE
instruction. Be sure to write all the 32 words in batch.

H8000 Gain for channel 1
H8001 Gain for channel 2

::

H801F Input type for channel 8

← Write the parameter data (32 words)

Step (3)

Write the value "1" into the command register (address H8020) by WRITE instruction.

H8020 Command register

← Write 1

Step (4)

Wait until the data of the response register (address H8021) comes "1". Check the data by
READ instruction.

H8021 Response register Check if it comes 1

Step (5)

Write the value "0" into the command register (address H8020) by WRITE instruction.

H8020 Command register

← Write 0

When the above steps are finished and the module status (addresses H8030 to H8037) shows
no error, the parameter setting procedure is com p l eted. The parameters are effective and they
have been saved in the AD268's EEPROM.

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

30

PART 1 AD268

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6. Parameters

6.3 Sample program for set ting the parameters

A sample program to set the parameters is shown below.
This is an example to set the input type as 0 to 10V range (type = 1) for each channel.
In this sample program, it is assumed that he AD268 is allocated to XW000 to XW007.

For details of READ and WRITE instructions, refer to the T-series Instruction Set manual.

(Main program)

(H8020)

(H8021)

(H8020)

(H8000)

Step (1):
Writes 0 into the
command
register (H8020).

Step (2):
Writes parameters.

• Gain = 32000

• Offset = 0

• Average = 1

• Type = 1 (0-10V)

Total 32 words
starting with

Step (3):
Writes 1 into the
command
register (H8020).

Step (4):
Waits until the
response
register (H8021)
comes 1.

(H8020)

Step (5):
Writes 0 into the
command
register (H8020)
to return to initial
state.

In this sample program, the rung 1 is activated at the beg inning of RUN mode (at the second
scan) automatically. The input type is set to 0 to 10V for all 8 channels.
When the parameter setting process is completed, the flags R1000 to R1002 are returned to
OFF.

For reading the parameters from the AD268, there is no special procedure. Simply read the
data from the AD268’s buffer memory by using READ instruction.

User’s Manual

31

7. Troubleshooting

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7. Troubleshooting

7.1 RAS information

The RUN LED is provided on t he front of the AD268. When the AD268 is operating normally,
this LED is lit.
Also the module status information is provided in the AD268‘s buffer memory (addresses
H8030 to H8037). This information is useful for troubleshooting.

Module status:

(H8030 to H8037)
These data show the AD268’s operation status.

PART 1 AD268

Bit posit ion →

Bit Name Description

0 to 2 Input type Shows the input type.

3 to 5 - Reserved

6 Channel skip 1 when the channel skip is designated.
7 I nput type setting

8 Wire break 1 when wire breakage is detected. (Effective only for 4 to 20mA
9 Input limit 1 when the A/D conversion data is limited because of the range

A MPU error 1 when the AD268’s processor is not normal.
B ROM status 1 when the AD268’s EEPROM is not normal.
C DP-RAM status 1 when the AD268’s DP-RAM (buffer memory) is not nor mal.
D- Reserved
E External 24V error 1 when the external 24Vdc is not normal.
F Initializing 1 during the AD268 is in initialization process.

FEDCBA9876543210

0000

000 (0) = 0 to 5V/0 to 20mA
001 (1) = 0 to 10V
010 (2) = 1 to 5V/4 to 20mA
100 (4) = ±5V
101 (5) = ±10V

1 when the input type designation is invalid.

error

input)
over.

A sample program to read the module status information is shown below.

(H8030)

By the above sample program, the module status information for each channel is read from the
AD268, and stored in D4010 to D4017.
(In this sample program, it is assumed that the AD268 is allocated to XW000 to XW007)

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

32

PART 1 AD268

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7.2 Troubleshooting

The table below shows the trouble and its remedy.

7. Troubleshooting

Trouble Module

status info
Input type
setting error

Analog signal
wire breakage
(4-20mA only)
Analog signal
limit over

MPU error Bit A is ON OFF The A/ D conversion

ROM error Bit B is ON OFF The A/D conversion
DP-RAM error Bit C is ON OFF The A/D conv er si on

External 24V
error

Bit 7 is ON ON

Bit 8 is ON ON The A/D conversion

Bit 9 is ON ON The A/D conversion

Bit E i s ON OFF The A/D conver si on

LED Module operation Cause Remedy

The error channel
(if the error
occurs in all
channels, it
is OFF)

stops the

conver sion. The A/D

conversion data is 0.

data of the channel

is 0.

data of the channel

is limited by the limit

value.

is stopped.

is stopped.

is stopped.

is stopped.

Invalid input type
parameter was set.

In the 4-20mA
input, less than
4mA signal is input.
Analog input signal
is out of the range.

Internal pr ocessor
operation is not
normal.

EEPROM data
error is detected.
Buffer memory
access error is
occurred.

Internal ±15V
voltage is not
normal.

Set the correct
input type
parameter.

Check the analog
signal wire.

Check the signal
source (sensor).

Execute reset
comm and, or
cycle power off
and on.
Cycle power off
and on.
Cycle power off
and on.

Check the
external 24Vdc
power supply.

User’s Manual

33

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

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34

Part 2

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4 Channel Analog Output Module

DA264

1. Introduction, 36

2. Specifications, 38

3. Output Type Setting, 40

4. Wiring, 41

5. I/O Allocation and Programming, 44

6. Parameters, 51

7. Troubleshooting, 56

User’s Manual

35

1. Introduction

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1. Introduction

The DA264 is a 4 channel analog output module for the T2 series programmable controllers.
The DA264 converts digital values given by the T2 program into the analog signals (voltage or
current).

1.1 DA264 Functions

The DA264 has the following functions.

1) 4 channels output per module

2) Selectable output type

• ±5V

• ±10V

• 0 to 5V

• 0 to 10V

• 1 to 5V

• 0 to 20mA

• 4 to 20mA

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

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

5) Off set calibration function

6) Output hold function

PART 2 DA264

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

36

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1.2 External features

1. Introduction

Model type DA264
Status indication LED

Removable term inal block

Analog output terminal

External power supply connection terminal
Line ground and Frame ground terminal

Terminal block fixing screw
2-points

User’s Manual

37

2. Specifications

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2. Specifications

This section describes the DA264 specifications.
The general specification for the DA264 conforms to the specification for the T2 PLC.

2.1 Specifications

Item DA264

Output type Voltage output Current output

Bipolar

Output range

Unipolar

Load impedance
Number of output channels 4 channels
I/O allocation type Y 4W (4 output registers YW are assigned)
Resolution 16-bit

Overall accuracy
Temperature drift

Conversion cycle Approx. 1ms/channel (Approx. 4m s/4 channels)
Insulation resistance

Withstand voltage

Status indication 1 green LED (On when normal)
Special function
External power supply

Internal 5Vdc current
consumption
External connection 20-pin removable terminal block
Weight Approx. 300g

-5 to 5V

-10 to 10V
0 to 5V 0 to 20mA
0 to 10V
1 to 5V 4 to 20mA
1kΩ or more 600Ω or less

±0.2% FS (at 25°C)
±0.5% FS (0 to 55°C) (FS: ±10V)
±100ppm/°C or less

10MΩ or more

1500Vac - 1 minute (betw een logic and analog circuits)
500Vac - 1 minute (betw een analog circuit and external 24V)
1500Vac - 1 minute (betw een analog circuit and FG/LG)

Offset calibration function
Output hold function
External 24Vdc power voltage drop detection

24Vdc ±10% - 240mA
230mA or less

PART 2 DA264

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

38

PART 2 DA264

output

output

output

output

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2.2 Internal block diagram

2. Specifications

T2 CPU

LED

Amplifier Buffer

P

(V→V)

Amplifier

D/A conversion

(V→I)

Internal control circuit

Amplifier Buffer

Amplifier

Optical isola t ion

Reference

voltage

(V→I)

TR

(V→V)

TR

N

P

N

P

N

P

N

Voltage

CH1

Current

Voltage

CH4

Current

+5V
+15V

-15V

Regulator

AG

Voltage

check
circuit

DC/DC

P24

Filter

converter

COM

LG

FG

The DA264 performs the following operations.
The digital data for D/A conversion generated by the T2 program are written into the DA264.
The written digital data are transferred to the D/A converter through optical isolator. Then the
D/A convert e r con v e rt s th e digital values to the analog signals.
The generated analog signals are output to each channel (CH1 to CH4) via amplifier. Each
channel has both the voltage output and the current output. However either voltage or current
output can b e u sed.

User’s Manual

39

3. Output Type Setting

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3. Output Type Setting

The DA264 supports multiple output ranges, ±5V, ±10V, 0 to 5V, 0 to 10V, 1 to 5V, 0 to 20mA,
or 4 to 20mA. The output range is selected by writing the parameter into the DA264 by the T2
program. The voltage or current output is selected by the DA264’s output terminals.

The general flow for setting the output type is as follows.
(1) Mount the DA264 onto the T2 rack.

(2) Turn on power to the T2 system.
(3) Execute I/O all ocation.
(4) Program the "out put typ e settin g program". (see below)
(5) Turn the T2 to RUN mode.

3.1 Parameter setting by software

The output range o f the DA264 is specified by writing the following parameter data into the
DA264's buffer memory. To write the parameter into the buffer memory, T2 user program
(WRITE instruction) is used.
These parameter data are not maintained in the DA264. Therefore, program the output type
setting routine and execute it at each time of the beginning of the operation.

PART 2 DA264

Output type parameter data:

Output typeParameter

data

0 0 to 5V 0 to 20mA
1 0 to 10V
2 1 to 5V 4 to 20mA
4
5

Voltage output Current output

±5V
±10V

DA264 buffer memory address:

H8004 Output type f or channel 1
H8005 Output type f or channel 2
H8006 Output type f or channel 3
H8007 Output type f or channel 4

The fa ct o ry se tting is 0 t o 5V / 0 to 20mA

range.

Refer to section 6 for the sample program to set the output type.

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

40

PART 2 DA264

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4. Wiring

4.1 Terminal arrangement

DA264 terminal block

1VN 2

1CN 4

2VN 6

2CN 8

3VN 10

3CN 12

4VN 14

4CN 16

COM 18

FG 20

4. Wiring

11VP
31CP
52VP
72CP

93VP
11 3CP
13 4VP
15 4CP
17 P24
19 LG

Terminal

No.

11VP
21VN
31CP
41CN
52VP
62VN
72CP
82CN

93VP
10 3VN
11 3CP
12 3CN
13 4VP
14 4VN
15 4CP
16 4CN
17 P24 External 24Vdc power (+)
18 COM External 24Vdc power (-)
19 LG Line filter ground
20 FG Frame ground

Signal

name

Function
Channel 1 Voltage output
Channel 1 Current output
Channel 2 Voltage output
Channel 2 Current output
Channel 3 Voltage output
Channel 3 Current output
Channel 4 Voltage output
Channel 4 Current output

User’s Manual

41

4. Wiring

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4.2 Signal wiring

Voltage output

PART 2 DA264

DA264

+15V

Shielded twisted-pair cable

nVP

nVN

-15V
AG

n : Channel number (1 to 4)
AG : Analog ground

Current output

+15V

n : Channel number (1 to 4)
AG : Analog ground

External 24Vdc power supply

+15V

Internal circui t

DA264

+15V

Shielded twisted-pair cable

nCP

nCN

-15V
AG

Internal circui t

DA264

DC/DC

converter

AG

-15V

Internal circui t

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

42

P24

COM

LG

FG

(b)(a)

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)

+

24Vdc ±10%

-

PART 2 DA264

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4.3 Wiring precautions

(1) Use shielded twisted-pair cables for analog output 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.

Analog

(a)

(b)

output

module

Analog

output

module

4. Wiring

Analog

(c)

output

module

(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) When the external 24Vdc power is applied, about 0.7V voltage will output for few ms

(milliseconds). Therefore the power-up sequence should be as follows.
External 24Vdc → T2 main power → Power for output load

User’s Manual

43

5. I/O Allocation and Programming

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5. I/O Allocation and Programming

5.1 Allocation to the T2 registers

The I/O type of the DA264 is "Y 4W".
When the automatic I/O allocation operation is performed with a DA264 mounted on the rack,
the DA264 is allocated as "Y 4W".
The DA264 occupies the 4 consecutive output (YW) registers of the T2.
In this manual, these assigned I/O registers are expressed as YW(n), YW(n+1), YW(n+2) and
YW(n+3).

The following figure shows an example of I/O allocation window of the T-PDS programming
software. In this case, the DA264 is mounted in the slot 0 of base unit BU218.

DI32

PS261

PU234E

No slot

DA264

DO32

Vacant

Vacant

Vacant

Vacant

Vacant

PART 2 DA264

In the above example, the DA264 is allocated on the unit-0, slot-0. And 4 I/O registers, YW 000
to YW003 are assigned to the DA264.

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

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5. I/O Allocation and Programming

5.2 D/A conversion data

To output the desired analog signals from the DA264, simply write the appropriate data into the
assigned I/O regis ters YW(n) to YW(n+3) for the DA264.

The data of YW(n) to YW(n+3) are transferred to the DA264 at the T2’s batch I/O processing.
Then in the DA264, these D/A conversion data are converted into the analog signals and
output from the DA264.

The I/O register assignment is as follows.

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

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

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

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

The conversion data to be written into the YW register is dependent on the output type as
follows.

±±±±10V range:

D/A conversion data

Hexadecimal Integer

Upper limit H7F80 32640 +10 .2 V

:::

Full scale (positive) H7D00 32000 +10 V

:::

H0001 1 +0.3125 mV

0 H0000 0 0 V

HFFFF -1 -0 . 3125 mV

:::

Full scale (negative) H8300 -32000 - 10 V

:::

Lower limit H8080 -32640 -10 . 2 V

H7D00

Analog output value

+5.1196V

H8000

-32768

HC000

-16384

0

H3FFF

16383

-5.12V

32000

+10V

Digital data

H7FFF

32767

Output voltage Resolution

A = 0.3125 × D

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

0.3125 mV / bit

-10V
H8300

-32000

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45

5. I/O Allocation and Programming

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±±±±5V ra nge:

PART 2 DA264

D/A conversion data

Hexadecimal Integer

Upper limit H3FFF 16383 +5 . 1196 V

:::

Full scale (positive) H3E80 16000 +5 V

:::

H0001 1 +0.3125 mV

0 H0000 0 0 V

HFFFF -1 -0 . 3125 mV

:::

Full scale (negative) HC180 -16000 -5 V

:::

Lower limit HC000 -16384 -5. 1 2 V

Analog output value

H3E80

16000

Upper limit

H3FFF

16383

+5V

Digital data

H7FFF

32767

H8000

-32768

+5.1196V

HC000

-16384

0

Output voltage Resolution

0.3125 mV / bit

A = 0.3125 × D

-5V
Lower limit

HC180

-16000

-5.12V

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

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0 to 10V range:

5. I/O Allocation and Programming

D/A conversion data

Hexadecimal Integer

Upper limit H7F80 32640 +10 .2 V

:::

Full scale (positive) H7D00 32000 +10 V

:::

H0001 1 +0.3125 mV

0 H0000 0 0 V

Analog output value

+10V

H7D00

32000

Digital data

H7FFF

32767

H8000

-32768

Lower limit

0

Output voltage Resolution

0.3125 mV / bit

A = 0.3125 × D

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

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47

5. I/O Allocation and Programming

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0 to 5V / 0 to 20mA range:

PART 2 DA264

D/A conversion data Output voltage/current

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

Upper limit H3FFF 16383 +5 .1196 V +20.479 mA

::::

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

::::

H0001 1 +0 .3125 mV +0.00125 mA

0 H0000 0 0 V 0 mA

Analog output value

+5.1196V

(+20.478mA)

H8000

-32768

H3E80

16000

Upper limit

0

Digital dataLower limit

H3FFF

16383

+5V
(+20mA)

H7FFF

32767

0 to 5V range:

A = 0.3125 × D

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

0 to 20mA range:

A = 1.25 × D

Resolution

0.3125 mV / bit

1.25 µA / bit

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

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1 to 5V / 4 to 20mA range:

5. I/O Allocation and Programming

D/A conversion data Output voltage/current

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

Upper limit H337F 13183 +5 . 1196 V +20.479 mA

::::

Full scale (positive) H3200 12800 +5 V +20 m A

::::

H0001 1 +1 .0003125 V +4.00125 mA

0 H0000 0 1 V 4 mA

::::

Lower limit HF380 -3200 0 V 0 m A

Analog output value

H3200

12800

H337F

13183

1 to 5V range:

A = 0.3125 × D + 1000

Upper limit

Digital data

H7FFF

32767

+5V
(+20mA)

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

4 to 20mA range:

A = 1.25 × D + 4000

Lower limit

H8000

-32768

+5.1196V

(+20.478mA)

+1V

(+4mA)

0

HF380

-3200

Resolution

0.3125 mV / bit

1.25 µA / bit

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

User’s Manual

49

5. I/O Allocation and Programming

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5.3 Programming

To output the desired analog signal from the DA264, there is no need to use any special
instruction. W hen the D/A conversion data is written in the assigned output register (YW
register), it is transferred to the DA264 and converted to the corresponding analog signal.

For example, when the DA264 is allocated to YW000 to YW003, the D/A conversion data of
each channel is assigned as follows.

YW000 : Channel 1 D/A conversion data
YW001 : Channel 2 D/A conversion data
YW002 : Channel 3 D/A conversion data
YW003 : Channel 4 D/A conversion data

Therefore, in t he user program, you can use any instructions to write data in these YW
registers for the analog data processing.

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

PART 2 DA264

Rung 1: During R1000 is ON, YW000 data is increased by 32 (channel 1 analog output is

increased by 0.0 1 V) every scan. It is upper-limited b y 32000 (10V).

Rung 2: During R1001 is ON, YW000 data is decreased by 32 (channel 1 analog output is

decreased by 0.01V) every scan. It is lower-limited by -32000 (-10V).

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6. Parameters

The DA264 has the memory that stores the control parameters, output 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.

These parameter data are not maintained in the DA264. Therefore, you should write the
necessary parameter data at each time of the beginning of the operation.

6.1 Memory map

The contents of the DA264's buffer memory are as fo llo w s .

6. Parameters

Address Contents

F0

H8000 Offset calibration value for channel 1
H8001 Offset calibration value for channel 2
H8002 Offset calibration value for channel 3
H8003 Offset calibration value for channel 4
H8004 Output type setting for channel 1
H8005 Output type setting for channel 2
H8006 Output type setting for channel 3
H8007 Output type setting for channel 4
H8008 Analog output read-back value for channel 1

H8009 Analog output read-back value for channel 2
H800A Analog output read-back value for channel 3
H800B Analog output read-back value for channel 4
H800C Module status for channel 1
H800D Module status for channel 2
H800E Module status for channel 3
H800F Module status for channel 4

Use WRITE instruction to write
data into these addresses.

Use READ instruction to read
data from these addresses.

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51

6. Parameters

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Offset calibration value:

(H8000 to H8003)
At the factory shipment, the DA264 is calibrated for each ou tp u t range. Therefore, there is no

need for user to calibrate normally.
However, depending on the usage condition, field adjustments are required. For this purpose,
the DA264 has the offset calibration function.

In the DA264, the D/A conversion is performed as follows.

PART 2 DA264

D/A conversion data
(written by T2 CPU)

Offset

processing

D/A

conversion

Amplifier

Analog output

When the o ffset calibration value is set, this value is added to the original D/A conversion data.
Then D/A conversion is performed in the DA264.

The data setting range of t he offset calibration value are as follows.

Offset calibration value

Upper limit 127 +39.69 m V
Default value 0 0 0
Lower limit -127 -39.69 mV

Output calibration range

Voltage Current

+158.75 µA

-158.75 µA

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6. Parameters

Output type setti ng:

(H8004 to H8007)
This parameter is used to select the output type.

This parameter also has a function to select either clear or hold the analog output signal in
case of the T2 operation stop (Halt or Error).

The available setting range is as follows.

Output type

0 to 5V 0 to 20mA 0 160
0 to 10V - 1 161
1 to 5V 4 to 20mA 2 162

±5V
±10V

-

-

Clear mode Hold mode

Setting value

4
5

164
165

The default setting value (factory setting) is 0 (0 to 5V / 0 to 20mA).
Between the clear mode and the hold mode, there is no difference in operation when the

controller (T2) is operating normally. However, when the T2 stops the operation by Halt mode
or Error mode, the DA264’s output status is different between these modes. Refer to the table
below.

Mode Condition Output type Analog output status

T2 is in normal operation Any Normal output

1 to 5V / 4 to 20mA 1V / 4mA
Other than above 0V / 0mA

Any 0V / 0mA

Holds the previous
output status

Any 0V / 0mA

Clear mode

Hold mode

T2 is in Halt or Error mode
T2’s main power is off Any 0V / 0mA

DA264’s external 24Vdc
power is off
T2 is in normal operation Any Normal output

T2 is in Halt or Error mode Any
T2’s main power is off Any 0V / 0mA

DA264’s external 24V dc
power is off

User’s Manual

53

6. Parameters

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Analog output read-back value:

(H8008 to H800B)
These data show the D/A conversion data after processing the offset calibration.

Module status:

(H800C to H800F)
These data show the DA264’s operation status.

PART 2 DA264

Bit posit ion →

Bit Name Description

0 to 2 Output type Shows the output ty pe.

3 to 4 - Reserved
5 to 7 Hold mode Show s the output mode, clear mode (normal) or hold mode.

8 Output type

9 to C - Reserved

D Output limit 1 when the D/A conversion data is limited because of the range
E External 24V error 1 when the external 24Vdc is not normal.

F- Reserved

FEDCBA9876543210

00000 00

000 (0) = 0 to 5V/0 to 20mA
001 (1) = 0 to 10V
010 (2) = 1 to 5V/4 to 20mA
100 (4) = ±5V
101 (5) = ±10V

101 = Hold mode
Other than above = Clear mode

1 when the output type designation is invalid.

setting error

over.

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6. Parameters

6.2 Sample program to access the parameters

To write the parameters into the DA264’s buffer memory, use the WRITE instruct ion. No
special pr ocedure is requir ed.
To read the parameters from the DA264’s buffer memory, use the READ instruction.

A sample program to write/read the parameters is shown below.
This is an example to set the output type as ±10V range (type = 5) for each channel.
In this sample program, it is assumed that he DA264 is allocated to YW000 to YW003.

For details of READ and WRITE instructions, refer to the T-series Instruction Set manual.

(Main program)

(H8004)

(H8008)

Writes 5 (c) into
4 words starting
with address
H8004.

Reads 8 words
from addr ess
H8008 and after.

In this sample program, the rung 1 is activated at the beg inning of RUN mode (at the second
scan) automatically. The output type is set to ±10V for all 4 channels.
The rung 2 is to read the analog output read-back values and the module status. These data
are read from the DA264 and stored in D4020 to D4027.

User’s Manual

55

7. Troubleshooting

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7. Troubleshooting

7.1 RAS information

The RUN LED is provided on t he front of the DA264. When the DA264 is operating normally,
this LED is lit.
Also the module status information is provided in the DA264‘s buffer memory (addresses
H800C to H800F). This information is useful for troubleshooting.
Refer to section 6 for the module status information and how to read it.

7.2 Troubleshooting

The table below shows the trouble and its remedy.

PART 2 DA264

Trouble Module

status info
Output type
setting error

D/A
conversion
data limit over

External 24V
error

Bit 8 is ON ON

Bit D is ON O N The D/A conversion

Bit E i s ON OFF The D/A conv er si on

LED Module operation Cause Remedy

(if the error
occurs in all
channels, it
is OFF)

The D/A conversion
continues based on
the previous setting.

data of the channel
is limited by the limit
value.

is stopped. Output
signal is 0V/0 m A .

Invalid output type
parameter was set.

The written D/A
conversion data is
out of the range.

Internal ±15V
voltage is not
normal.

Set the correct
output type
parameter.

Check the output
rage and write
the correct data.

Check the
external 24Vdc
power supply.

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

56

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57

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

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58

Part 3

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8 Channel Thermocouple Input Module

TC218

1. Introduction, 60

2. Specifications, 62

3. Input Type Setting, 64

4. Wiring, 66

5. I/O Allocation and Programming, 69

6. Parameters, 75

7. Troubleshooting, 83

User’s Manual

59

1. Introduction

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1. Introduction

The TC218 is a thermocouple input module for the T2 series programmable controllers.
The TC218 is used to measure the temperature using thermocouples. Thermocouples type K,
J, or E can be used.
The TC218 can be used for ±100mV input also.
When the TC218 is used for the thermocouple input, it has 7 channels of thermocouple input.
The remaining 1 channel i s u s e d to measur e the ambient temperature for cold junction
compensation. For this purpose, a thermistor is attached with the TC218.
On the other hand, when the TC218 is used for ±100mV input, it has 8 channels of input.

1.1 TC218 Functions

The TC218 has the following functions.

1) 7 channels input per module for thermocouple input
8 channels input per module for ±100mV input

2) Selectable input type

• Thermocouple type K (-200 to +1200 °C)

• Thermocouple type J (-200 to +800 °C)

• Thermocouple type E (-200 to +600 °C)

• ±100mV

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

4) Built-in linearize function

5) Cold junction compensation function

6) Burnout detection function

7) Input data averaging function

8) Gain and offset calibration function (±100mV input only)

PART 3 TC218

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1.2 External features

1. Introduction

Model type TC218
Status indication LED

Removable term inal block

Analog input terminal

External power supply connection terminal
Line ground and Frame ground terminal

Terminal block fixing screw
2-points

For thermocouple input, CH2 to CH8 are used to connect the thermocouple input wires. The
CH1 is used to connect the thermistor to measure the ambient temperature for cold junction
compensation.
For ±100mV input, all 8 channels CH1 to CH8 are used.

User’s Manual

61

2. Specifications

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2. Specifications

This section describes the TC218 specifications.
The general specification for the TC218 conforms to the specification for the T2 PLC.

2.1 Specifications

Item TC218

Input type Voltage input Thermocouple input

mV input Type K Type J Type E

Input range

Number of input channels 8 channels 7 channels 7 channels 7 channels
Input impedance
I/O allocation type X 8W (8 input registers XW are assigned)
Resolution 16-bit

Overall accuracy

Temperature drift
Conversion cycle Approx. 1ms/channel (Approx. 8ms/8 channels)
Insulation resistance

-100 to +100
mV

1MΩ or more

±0.2% FS (at 25°C)
±0.5% FS (0 to 55°C)
(FS: ±100mV (mV input) or 1400°C (type K))
±100ppm/°C or less

10MΩ or more

1500Vac - 1 minute (betw een logic and analog circuits)

Withstand voltage

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)

Gain and offset calibration function (mV input only)
Linearize function (thermocouple input)

Special function

External power supply
Internal 5Vdc current

consumption
External connection 20-pin removable terminal block
Weight Approx. 300g

Cold junction compensation function (thermocouple input)
Burnout detection function (thermocouple input)
Input data averaging function
External 24Vdc power voltage drop detection

24Vdc ±10% - 120mA
300mA or less

-200 to +1200°C-200 to +800°C-200 to +600

PART 3 TC218

°C

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2.2 Internal block diagram

Reference voltage

2. Specifications

CH1

CH2

CH8

P

N

P

N

P

N

Jumper

Jumper

Jumper

1

2

3

+15V

1

2

3

+15V

1

2

3

Filter

Filter

Filter

Buffer

Buffer

Buffer

LED

Multiplexer

A/D conversion

T2 CPU

Internal control circuit

EEPROM

Optical isola t ion

+5V
+15V

-15V

P24

COM

LG

FG

Regulator

Filter

DC/DC

converter

AG

Voltage

check

circuit

The TC218 performs the following operations.
The external analog signals come to th e buffer amplifier through the filter. The multiplexer
sequentially selects CH1 to CH8 to convert the input analog signals into digital data via the A/D
converte r. Th e converte d 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 TC218's parameters are stored in the EEPROM.

User’s Manual

63

3. Input Type Setting

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3. Input Type Setting

The TC218 supports multiple input types, type K, type J, type E, or ±100mV. The input type is
selected by jumper plug setting and the parameter writing by the T2 program.

Note that the input type can be selected either one, type K, type J, type E, or ±100mV, for all
channels. Any mixture settings among the channels are not allowed.

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

(2) Mount the TC218 onto the T2 rack.
(3) Turn on power to the T2 system.
(4) Execute I/O all ocation.
(5) Program the "input type setting program". (see the nex t page)
(6) Turn the T2 to RUN mode.
(7) Cycle power off/on

3.1 Jumper plug setting

8 jumper plugs are provided on the TC218 board.
The jumper plug setting is for selecting either thermocouple input or mV input.

PART 3 TC218

Jumper plugs (JP1 to JP8)

Set all the jumper plugs either side 1 or 3.

Side 1: Thermocouple input
Side 3: ±100mV input

The fa ctory setting is ±100mV input (side 3).

•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.

1

3

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3. Input Type Setting

3.2 Parameter setting by software

The input type of the TC218 is specified by writing the following parameter data into the
TC218's buffer memory. To access the buffer memory, T2 user program (READ and WRITE
instructions) is requi red.
When the parameter is set to the TC218, it is saved in the TC218'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 TC218

Buffer memory

WRITE

User program

READ

EEPROM

Input type parameter data:

Parameter

data

0 Type K thermocouple
1 Type J thermocouple
2 Type E thermocouple
5

Input type

±100mV

TC218 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 f or channel 8

Set the same parameter data for all 8 channels.
The fa ctory setting is

±100mV range.

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

User’s Manual

65

4. Wiring

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4. Wiring

4.1 Terminal arrangement

TC218 terminal block

1N 2

2N 4

3N 6

4N 8

5N 10

6N 12

7N 14

8N 16

COM 18

FG 20

PART 3 TC218

11P
32P
53P
74P

95P
11 6P
13 7P
15 8P
17 P24
19 LG

Terminal

No.

11P
21N
32P
42N
53P
63N
74P
84N

95P
10 5N
11 6P
12 6N
13 7P
14 7N
15 8P
16 8N
17 P24 External 24Vdc power (+)
18 COM External 24Vdc power (-)
19 LG Line filter ground
20 FG Frame ground

Signal

name

Function
Channel 1 input
Channel 2 input
Channel 3 input
Channel 4 input
Channel 5 input
Channel 6 input
Channel 7 input
Channel 8 input

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4.2 Signal wiring

4. Wiring

±±±±100mV input (CH1 to CH8)

Voltage source

Shielded twisted-pair cable

+

V

-

Thermocouple input

Connect the thermistor
attached to the TC218

CH1

TC218

+15V

1

nP

nN

AG -15V

Internal circui t

TC218

1P

1N

AG -15V

2

3

Set the jumper

plug to Side 3

1
2

3

Set the jumper

plug to Side 1

+15V

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

+15V

CH2 to CH8

Thermocouple cable

Positive side

Negative side

+15V

1

nP

nN

AG -15V

Internal circui t

2

3

Set the jumper

plug to Side 1

+15V

n : Channel number (2 to 8)
AG : Analog ground
FG : Frame ground

User’s Manual

67

4. Wiring

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PART 3 TC218

External 24Vdc power supply

+

24Vdc ±10%

-

(b) (a)

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)

TC218

P24

DC/DC

converter

COM

LG

FG

Internal circui t

4.3 Wiring precautions

(1) The thermocouple signal is weak voltage. Pay attention to prevent noise interfe r e nce.

• Shortest cable distance

• Cable shield and grounding

• Separation from other c ables

+15V

AG

-15V

(2) 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.

(3) If the external 24Vdc power for this module is not stable, t h e converted data will not be

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

(4) It is recommended to short the unused channels. Because if it is open, meaningless A/D

conversion data will appear.

(5) 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.

(6) When this module is used for thermocouple input, connect the thermistor to channel 1

(CH1). The thermistor is attached with this module.

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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 TC218 is "X 8W".
When the automatic I/O allocation operation is performed with a TC218 mounted on the rack,
the TC218 is allocated as "X 8W".
The TC218 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 TC218 is mounted in the slot 0 of base unit BU218.

DI32

PS261

PU234E

No slot

TC218

DO32

Vacant

Vacant

Vacant

Vacant

Vacant

In the above example, the TC218 is allocated on the unit-0, slot-0. And 8 I/O registers, XW000
to XW007 are assigned to the TC218.

User’s Manual

69

5. I/O Allocation and Programming

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5.2 A/D conversion data

The analog signals received by the TC218 are converted into the digital data in this module.
These con v e rt e d digi tal 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.

±±±±100mV input:

PART 3 TC218

Input voltage

Upper limit +102 mV H7F80 32640

:: :

Full scale (positive) +100 mV H7D00 32000

:: :

+3.125 µV

0 0 V H0000 0

-3.125 µV
:: :

Full scale (negative) -100 mV H8300 -32000

:: :

Lower limit -102 mV H8080 -32640

Digital value

H3FFF

16383

0

-102mV

-51.2mV

+51.196mV

Hexadecimal Integer

+100mV

Analog input

+102mV

A/D conversion data

H0001 1

HFFFF -1

H7D00
32000

D = 320 × A

HC000

-16384

H8300

-32000

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

Resolution

3.125 µV / bit

-100mV

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Thermocouple (type K) input:

5. I/O Allocation and Programming

Input

temperature

Burnout detection - H7FFF 32767

Upper limit

Full scale (positive)

0 0 V H0000 0

Full scale (negative)

Lower limit

Digital vale

+1370 °C

:: :

+1200 °C

:: :

+0.05 °C

-0.05 °C
:: :

-200 °C
:: :

-270 °C

Hexadecimal Integer

Upper limit

A/D conversion data

H6B08 27400

H5DC0 24000

H0001 1

HFFFF -1

HF060 -4000

HEAE8 -5400

H5DC0
24000

Resolution

0.05 °C / bit

HF060

-4000
Lower limit

0

-200°C

Temperature

+1200°C

D = 20 × A

D: Digital dat a
A: Temperature (°C)

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5. I/O Allocation and Programming

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Thermocouple (type J) input:

PART 3 TC218

Input

temperature

Burnout detection - H7FFF 32767

Upper limit

Full scale (positive)

0 0 V H0000 0

Full scale (negative)

Lower limit

Digital vale

+1200 °C

:: :

+800 °C

:: :

+0.05 °C

-0.05 °C
:: :

-200 °C
:: :

-210 °C

Hexadecimal Integer

Upper limit

A/D conversion data

H5DC0 24000

H3E80 16000
H0001 1

HFFFF -1

HF060 -4000

HEF98 -4200

H3E80
16000

Resolution

0.05 °C / bit

HF060

-4000
Lower limit

0

-200°C

+800°C

Temperature

D = 20 × A

D: Digital dat a
A: Temperature (°C)

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Thermocouple (type E) input:

5. I/O Allocation and Programming

Input

temperature

Burnout detection - H7FFF 32767

Upper limit

Full scale (positive)

0 0 V H0000 0

Full scale (negative)

Lower limit

Digital vale

+1000 °C

:: :

+600 °C

:: :

+0.05 °C

-0.05 °C
:: :

-200 °C
:: :

-270 °C

Hexadecimal Integer

Upper limit

A/D conversion data

H4E20 20000

H2EE0 12000

H0001 1

HFFFF -1

HF060 -4000

HEAE8 -5400

H2EE0
12000

Resolution

0.05 °C / bit

HF060

-4000
Lower limit

0

-200°C

+600°C

Temperature

D = 20 × A

D: Digital dat a
A: Temperature (°C)

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5. I/O Allocation and Programming

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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 TC218 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 t he user 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 2 input data.
(Thermocouple type K setting)

PART 3 TC218

By the above program, the ON/OFF status of the internal relays R0200 to R0203 are changed
as follows.

Temperature XW001 data

More than 550 °C 11000 < XW001
510 to 550 °C 10200 < XW001 ≤ 11000
490 to 510 °C 9800 ≤ XW001 ≤ 10200
450 to 490 °C 9000 ≤ XW001 < 9800
Less than 450 °C XW001 < 9000

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74

R0200 R0201 R0202 R0203

Status of the internal relays

ON ON OFF OFF
OFF ON OFF OFF
OFF OFF OFF OFF
OFF OFF ON OFF
OFF OFF ON ON

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6. Parameters

6. Parameters

The TC218 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 TC218's buffer memory are as follo w s .

Address Contents

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

F0

No use

Use WRITE instruction to write
data into these addresses.

Use READ instruction to read
data from this address.

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75

6. Parameters

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PART 3 TC218

Address Contents

F0

H8028 Analog input actual value for channel 1

H8029 Analog input actual value for channel 2
H802A Analog input actual value for channel 3
H802B Analog input actual value for channel 4
H802C Analog input actual value for channel 5
H802D Analog input actual value for channel 6
H802E Analog input actual value for channel 7
H802F Analog input actual value for channel 8

H8030 Module status for channel 1

H8031 Module status for channel 2

H8032 Module status for channel 3

H8033 Module status for channel 4

H8034 Module status for channel 5

H8035 Module status for channel 6

H8036 Module status for channel 7

H8037 Module status for channel 8

Use READ instruction to read
data from these addresses.

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Gain calibration value & Offset calibration value: (±±±±100mV input only)

(Gain: H8000 to H8007, Offset: H8008 to H800F)
For the ±100mV input, the gain and offset calibration is possible.

In the TC218, the A/D conversion data is calculated a s follows .

6. Parameters

Analog input

A/D

conversion

Offset

processing

Gain

processing

A/D conversion data
(read by T2 CPU)

When the gain calibration value is G and the offset calibration value is O, the conversion
calculation is performed in the TC218 as follows.

= (X1 + O) × G / 32000

2

X

: Initial A/D conversi on value

1

X

: Gain/offset processed value

2

X
O: Offs et calibra t ion value (buf fer memory address H8008 to H800F)
G: Gain calibration va lue (buffer memory address H8000 to H8007)

The data setting range of the g ain and offset calibration value are as follows.

Input type Gain calibration value

Upper limit 32000

±100mV
Thermocouple Not applicabl e

Input type Offset calibration value
±100mV
Thermocouple Not applicabl e

Default value 32000
Lower limit 10000

Upper limit 3200
Default value 0
Lower limit -3200

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6. Parameters

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Averaging times:

(H8010 to H8017)
This parameter is for the averaging processing for the analog input data. The moving average

is calculated by the given averaging times parameter.
For example, if the averaging times parameter is 100, the average value of latest 100 times
conversion is output as the A/D conversion data.
This function is effective to reduce the fluctuation caused by noise.

The available setting range is as follows.

Input type Aver aging tim es

Upper limit 127
Default value 1All types
Lower limit 1

Input type setting:

(H8018 to H801F)

PART 3 TC218

This parameter is used to select the input type. This parameter also has a function to skip the
A/D conversion for unused channels. By using the channel skip function, the conversion cycle
time can be reduced.

The available setting range is as follows.

Input type Set ting value
Type K thermocouple 0
Type J thermocouple 1
Type E thermocouple 2
±100mV

5

The default setting value (factory setting) is 5 (±100mV).

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6. Parameters

Command register:

(H8020)
This register is used to issue the following commands to the TC218. To issue the command,

write the command value by usin g WRITE instruction.

Value Command Description

0 - Write 0 after the command processing is completed.

When this command is issued, the parameters written into

1 Parameter set

2 Reset command

the buffer memory are saved in the TC218 ’s EEPROM, and
the parameters become effective.
Used to reset the TC218 when some error has occurred.
However if the error is caused by hardware or external
conditi on, the reset command may not be effective .

The command register and the response register are used for hand-shaking. Refer to section

6.2 for the parameter setting procedure.

Response register:

(H8021)
This register shows the TC218’s response for the command issued. Check the status of this

register us ing READ instruction.

Value Response Description

0 - The requested command is not yet completed.
1 Acknowledge

When the issued command is completed, the response
register comes 1.

The command register and the response register are used for hand-shaking. Refer to section

6.2 for the parameter setting procedure.

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79

6. Parameters

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Analog input actual v al ue:

(H8028 to H802F)
These data show the original A/D conversion data before processing the gain and offset

calibration.

Module status:

(H8030 to H8037)
These data show the TC218’s operation status.

PART 3 TC218

Bit posit ion →

Bit Name Description

0 to 2 Input type Shows the input type.

3 to 6 - Reserved

7 I nput type setting
8 Burnout detection 1 when thermocouple burnout is detected.

9 Input limit 1 when the A/D conversion data is limited because of the range

A MPU error 1 when the TC218’s processor is not normal.
B ROM status 1 when the TC218’s EEPROM is not normal.
C DP-RAM status 1 when the TC218’s DP-RAM (buffer memory) is not normal.
D- Reserved
E External 24V error 1 when the external 24Vdc is not normal.
F Initializing 1 during the TC218 is in initialization process.

FEDCBA9876543210

00000

000 (0) = Type K thermocouple
001 (1) = Type J thermocouple
010 (2) = Type E thermocouple
101 (5) = ±100mV

1 when the input type designation is invalid.

error

over.

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6. Parameters

6.2 Parameter setting procedure

When you change the TC218 parameters, such as input type settings, gain/offset calibrations
and averaging times, use the following procedure.

Step (1)

Write the value "0" into the command register of the TC218 buffer memory (address H8020)
by WRITE instruction.

H8020 Command register

← Write 0

Step (2)

Write the parameter data into the buffer memory (addresses H8000 to H801F) by WRITE
instruction. Be sure to write all the 32 words in batch.
For thermocouple, write the default value for the gain (32000) and the offset (0).

H8000 Gain for channel 1
H8001 Gain for channel 2

::

H801F Input type for channel 8

← Write the parameter data (32 words)

Step (3)

Write the value "1" into the command register (address H8020) by WRITE instruction.

H8020 Command register

← Write 1

Step (4)

Wait until the data of the response register (address H8021) comes "1". Check the data by
READ instruction.

H8021 Response register Check if it comes 1

Step (5)

Write the value "0" into the command register (address H8020) by WRITE instruction.

H8020 Command register

← Write 0

When the above steps are finished and the module status (addresses H8030 to H8037) shows
no error, the parameter setting procedure is com p l eted. The parameters are effective and they
have been saved in the TC218's EEPROM.

Note) After you write the parameters into the TC218, turn off power and on again.

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6. Parameters

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PART 3 TC218

6.3 Sample program for set ting the parameters

A sample program to set the parameters is shown below.
This is an example to set the input type as the type J thermocouple (type = 1) for each channel.
In this sample program, it is assumed that he TC218 is allocated to XW000 to XW007.

For details of READ and WRITE instructions, refer to the T-series Instruction Set manual.

(Main program)

(H8020)

(H8021)

(H8020)

(H8000)

Step (1):
Writes 0 into the
command
register (H8020).

Step (2):
Writes parameters.

• Gain = 32000

• Offset = 0

• Average = 1

• Type = 1 (type J)

Total 32 words
starting with

Step (3):
Writes 1 into the
command
register (H8020).

Step (4):
Waits until the
response
register (H8021)
comes 1.

(H8020)

Step (5):
Writes 0 into the
command
register (H8020)
to return to initial
state.

In this sample program, the rung 1 is activated at the beg inning of RUN mode (at the second
scan) automatically. The input type is set to the type J thermocouple for all 8 channels.
When the parameter setting process is completed, the flags R1000 to R1002 are returned to
OFF.

For reading the parameters from the TC218, there is no special procedure. Simply read the
data from the TC218’s buffer memory by using READ instruction.

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7. Troubleshooting

7. Troubleshooting

7.1 RAS information

The RUN LED is provided on t he front of the TC218. When the TC218 is operating normally,
this LED is lit.
Also the module status information is provided in the TC218‘s buffer memory (addresses
H8030 to H8037). This information is useful for troubleshooting.

Module status:

(H8030 to H8037)
These data show the TC218’s operation status.

Bit posit ion →

Bit Name Description

0 to 2 Input type Shows the input type.

3 to 6 - Reserved

7 I nput type setting
8 Burnout detection 1 when thermocouple burnout is detected.

9 Input limit 1 when the A/D conversion data is limited because of the range

A MPU error 1 when the TC218’s processor is not normal.
B ROM status 1 when the TC218’s EEPROM is not normal.
C DP-RAM status 1 when the TC218’s DP-RAM (buffer memory) is not normal.
D- Reserved
E External 24V error 1 when the external 24Vdc is not normal.
F Initializing 1 during the TC218 is in initialization process.

FEDCBA9876543210

00000

000 (0) = Type K thermocouple
001 (1) = Type J thermocouple
010 (2) = Type E thermocouple
101 (5) = ±100mV

1 when the input type designation is invalid.

error

over.

A sample program to read the module status information is shown below.

(H8030)

By the above sample program, the module status information for each channel is read from the
TC218, and stored in D4010 to D4017.
(In this sample program, it is assumed that the TC218 is allocated to XW000 to XW007)

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7. Troubleshooting

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7.2 Troubleshooting

The table below shows the trouble and its remedy.

PART 3 TC218

Trouble Module

status info
Input type
setting error

Thermocouple
burnout

Analog signal
limit over

MPU error Bit A is ON OFF The A/ D conversion

ROM error Bit B is ON OFF The A/D conversion
DP-RAM error Bit C is ON OFF The A/D conv er si on

External 24V
error

Bit 7 is ON ON

Bit 8 is ON ON The A/D conversion

Bit 9 is ON ON The A/D conversion

Bit E i s ON OFF The A/D conver si on

LED Module operation Cause Remedy

The error channel
(if the error
occurs in all
channels, it
is OFF)

stops the

conver sion. The A/D

conversion data is 0.

data of the channel

is 32767 (H7FFF).

data of the channel

is limited by the limit

value.

is stopped.

is stopped.

is stopped.

is stopped.

Invalid input type
parameter was set.

The therm oc ouple
input wire becomes
open.
Analog input signal
is out of the range.

Internal pr ocessor
operation is not
normal.

EEPROM data
error is detected.
Buffer memory
access error is
occurred.

Internal ±15V
voltage is not
normal.

Set the correct
input type
parameter.

Check the
thermocouple.

Check the signal
source (sensor).

Execute reset
comm and, or
cycle power off
and on.
Cycle power off
and on.
Cycle power off
and on.

Check the
external 24Vdc
power supply.

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