TOHO ELECTRONICS TTM000 User Manual

TOHO ELECTRONICS INC.

Operation Manual, Communications

(TOHO protocol and MODBUS)

Model : TTM-000 Series
Designation : Digital Controller

1

Thank you very much for purchasing a TTM-000 Series (with communications). Please read this operation
manual carefully and use this product correctly.

Contents

1. Before using the product ...................................................................................................... 4

1.1 On this operation manual

1.2 Conditions for communications

1.3 What can be done with communications

1.4 Positioning communications (priority ranking)

1.5 Setting before communications

2. Settings regarding TOHO communications ......................................................................... 5

2.1 Overview

2.2 Setting a data length

2.3 Setting a stop bit length

2.4 Setting a parity

2.5 Setting whether to conduct a BCC check

2.6 Setting a communications speed

2.7 Setting an address

2.8 Setting a response delay

2.9 Switching communications mode

3. TOHO communications control ........................................................................................... 8

3.1 Communications procedure

3.2 Message types

3.3 Composition of a request message (transmitted from a high-level
computer to this product)

3.4 Composition of a response message (transmitted from this product to a
high-level computer)

3.5 Description of codes

3.6 Communications precautions

4. Examples of TOHO communications ................................................................................ 15

4.1 Examples of communications to be read

4.2 Examples of communications to be written

5. Settings regarding MODBUS communications ................................................................. 17

5.1 Overview

5.2 Setting a data length

5.3 Setting a stop bit length

5.4 Setting a parity

5.5 Setting a BCC check

5.6 Setting a communications speed

5.7 Setting an address

5.8 Setting a response delay

5.9 Switching communications mode

2

6. MODBUS communications control ................................................................................... 20

6.1 Communications procedure

6.2 Message types

6.3 Composition of an RTU request message (transmitted from a high-level
computer to this product)

6.4 Composition of an RTU response message (transmitted from this product
to a high-level computer)

6.5 Description of RTU codes

6.6 Precautions on RTU communications

6.7 Example of CRC-16 calculations

6.8 Composition of an ASCII request message (transmitted from a high-level
computer to this product)

6.9 Composition of ASCII response messages (transmitted from this product
to a high-level computer)

6.10 Description of ASCII codes

6.11 Precautions on ASCII communications

6.12 Example of LRC calculations

7. Specifications ..................................................................................................................... 35

7.1 Communications standard category

7.2 Communications specifications

8. Connections........................................................................................................................ 36

9. Table of identifiers (codes) ................................................................................................ 38

10. Table of ASCII codes ......................................................................................................... 41

3

1. Before using the product

1.1 On this operation manual

This is an operation manual regarding communications with a TTM-000 Series (hereinafter referred
to as "this product").

1.2 Conditions for communications

The communications function of this product is optionally specified. For that reason, you should
specify a communications option (RS-485) in purchasing this product.

1.3 What can be done with communications

With this product, users can write and read items specified in "9. Table of identifiers (codes)," such
as "reconfiguring, starting, or stopping items that are operable with the front keys" and "reading
information displayable on the display."

However, reading and writing with ordinary commands are performed with regarding to the RAM in
this product. Written data can be turned back into the values before the writing (the values stored on
the EEPROM) by turning power off and on again. To store the written data on the EEPROM of this
product, execute a store request message. (See "Communications precautions." in chapter 3.6, 6.6
and 6.11.)

Settings regarding options not added and other unnecessary settings cannot be read or written.

1.4 Positioning communications (priority ranking)

Data and parameters in this product can be changed with keys while in operation in the
communications mode.

While this product is in operation in the RO (read-only) mode, no data or parameter setting can be
changed by communications. (Provided that communications modes can be changed.)

1.5 Setting before communications

Before performing communications, this product must be set. See "2. Settings regarding TOHO
communications" and "5. Settings regarding MODBUS communications."

4

2. Settings regarding TOHO communications

2.1 Overview

Before communications is performed, initial settings must be made on this product. Enter such
settings with the keys on the front panel.

To switch to a series of setting screens, take the steps described below.
For details, see the operation manual furnished with this product.

Power ON

Initial setting

MODE key at least 2 seconds

▲　▼key

MODE Key

MODE Key

MODE Key

(For 4 seconds)

Operation mode screen

(Setting mode selection
screen)

Select a communications
setting mode

Set a communications protocol

: TOHO communications protocol

Select a communications
parameters

Select a communications
speed

MODE Key

Select a communications

MODE Key

MODE Key

MODE Key

Back to communications mode selection

address

Select a communications
response delay

Select communications
mode switchover

When the settings are over, press the MODE key at least 2 seconds to go back to the operation mode.
The parameters indicated above are initial values.

5

2.2 Setting a data length

Stop bit 1

Stop bit 2

No parity

O

dd parity

Even parity

Data length, 7 bits

Data length, 8 bits

BCC check disabled

BCC check enabled

1200 BPS

2400 BPS

4800 BPS

9600 BPS

19200 BPS

2.3 Setting a stop bit length

2.4 Setting a parity

2.5 Setting whether to conduct a BCC check

While in the "Set a communications parameter" screen on the preceding page, operate the ▲ and ▼

keys to make the settings. The initial value is .

＊＊＊＊

2.6 Setting a communications speed

While in the "Set a communications speed" screen on the preceding page, operate the ▲ and ▼ keys
to make the settings. The initial value is .

＊＊＊＊

2.7 Setting an address

While in the "Set a communications address" screen on the preceding page, operate the ▲ and ▼
keys to make the settings. The initial value is .

Setting range: 1 to 99 stations (It cannot be set to a 0.)

6

2.8 Setting a response delay

Read and write

Read

-only

Set a time from the time when the high-level computer finished sending a "request message" until
the time when it delivers the line and enters an input state.

While in the "Set a response delay" on the preceding page, operate the ▲ and ▼ keys to make the

settings. The initial value is 0.

Setting range: 0 to 250msec

* If the response delay is set to a short setting, the communications may not be conducted normally.
* In a real operation, the processing time for this product will be added, in addition to the response

delay.

2.9 Switching communications mode

While in the "Set communications mode switchover" screen on the preceding page, operate the ▲
and ▼ keys to make the settings.

＊＊＊＊

7

3. TOHO communications control

3.1 Communications procedure

This product returns a "response message" in response to a "request message" from a high-level
computer. It therefore does not initiate a transmission.

3.2 Message types

Messages are roughly divided into the following types:

Request message (transmitted

from a high-level computer)

Read request message

Write request message

Response message (transmitted

from this product)

Receipt acknowledgement and data

response

Write complete response

Reception error and error description

response

Store request message

: Response when a normal "request message" is received

: When a received "request message" contains an error

Store complete response

All codes (except for BCC) from STX and data to ETX are expressed in ASCII codes.
In assembling a program for a high-level computer, see "9. Table of identifiers (codes)" and "10.

Table of ASCII codes" at the end of the book.

8

3.3 Composition of a request message

(transmitted from a high-level computer to this product)

For codes ① to ⑩, see "3.5 Description of codes."
For specific examples of request messages, see "4.1 Examples of communications to be read"

and "4.2 Examples of communications to be written."

3.3.1 Composition of a read request message

Ｓ

□

□

Ｔ

□

Ｒ

Ｘ

①

Start code②Address③Contents of the

｜

request: read/write

Identifier

3.3.2 Composition of a write request message

Ｓ

□

□

□

□

□

Ｔ

Ｗ

□

Ｘ

①

Start code②Address③Contents of the

request: read/write

｜

④

｜

Identifier

｜

Ｂ

Ｅ

□

□

Ｃ

Ｔ

Ｃ

Ｘ

｜

④

⑥

End code⑦BCC data

Ｂ

□

□

⑤

｜

Numerical data

Ｅ

□

□

Ｃ

Ｔ

Ｃ

Ｘ

⑥

｜

｜

End code⑦BCC data

3.3.3 Composition of a store request message

Ｓ

□

□

Ｔ

Ｗ

Ｓ

Ｘ

①

Start code②Address③Contents of the

｜

request: read/write

9

Ｂ

ＲＥＴ

｜

Ｘ

⑥

End code⑦BCC data

Ｃ
Ｃ

Ｔ

④

Identifier

3.4 Composition of a response message

(transmitted from this product to a high-level computer)

For codes ① to ⑩, see "3.5 Description of codes."
For specific examples of request messages, see "4.1 Examples of communications to be read"

and "4.2 Examples of communications to be written."

3.4.1 Response message in response to a read request message

Ｓ
Ｔ
Ｘ

Ａ

□

□

□

□

□

□

□

□

Ｃ

□

Ｋ

Ｂ

Ｅ

□

Ｃ

Ｔ

Ｃ

Ｘ

①

Start code②Address

⑧

Acknowledge code

｜

④

｜

Identifier

⑤

｜

｜

Numerical data

⑥

｜

｜

End code⑦BCC data

3.4.2 Response message in response to a write/store request message

Ｓ
Ｔ
Ｘ

①

Start code②Address

Ａ

Ｂ

□

Ｅ

□

Ｃ

Ｃ

Ｔ

Ｋ

Ｃ

Ｘ

⑥

⑧

End code⑦BCC data

Acknowledge code

3.4.3 Response message in the case of an error

Ｓ
Ｔ
Ｘ

Ｎ

□

□

Ａ
Ｋ

Ｂ

Ｅ

□

Ｃ

Ｔ

Ｃ

Ｘ

①

Start code②Address

acknowledge code

Negative

10

⑥

⑨

⑩

End code⑦BCC data

Error code

3.5 Description of codes

The codes from ① STX, ② address to ⑩ ERR type as indicated below are expressed in

ASCII codes.
For the ASCII codes, see "10. Table of ASCII codes."
For conversion to ASCII codes, see "4. Examples of TOHO communications."

① STX

This code is needed for the receiver to detect the top of the message. It is affixed to the top

of a character string to be sent.

② Address

This is the address of the party (this product) with whom a high-level computer

communicates. The address in the response message from this product indicates the sender
of the response message.

③ Contents requested

Enter a code R or W.

R: to read data from this product
W: to write or store data in this product

④ Identifier

An identifier is a classification code (identifier) for data to be read or written and expressed

in a three-digit alphanumerical ASCII code. See "9. Table of identifiers (codes)."

⑤ Numerical data

These are data to be read or written, and are all expressed in five digits regardless of the

type.
Negative data: The "-" (minus) sign is in a single digit at the largest digit.
Position of the decimal point: 5-digit data does not include a decimal point.

Example: The table below indicates the significances of 5-digit numerical data -9999.

The data of which the

decimal point position

can be changed

(PV/SV)

Setting Meaning of Value

When decimal point position [_dP *] is 0

When decimal point position [_dp *] is 0.0

When decimal point position [_dp *] is 0.00

When decimal point position [_dp *] is 0.000

-9999

-999.9

-99.99

-9.999

11

⑥ ETX

Error No.

Error contents in the "request message" received by this product

0

Instrument error (memory error or A/D conversion error)

1 The numerical data deviated from the "range of settings desi

gnated specifically with setting

items."

2

The change of requested items is disabled or there are no items to be read.

3 An ASCII code other than the numerical data was specified in the field of numerical data.

An ASCII code other than "0" and "

-

" was sp

ecified in the field of codes.

4 Format error

5

BCC error

6 Overrun error

7 Framing error

8

Parity error

9 A PV error occurred during AT. Or AT will not end 3 hours later.

This code is needed for the receiver to detect the end of a message. It is affixed to the end of

a character string to be sent (except for BCC).

⑦ BCC

This is a check code for error detection and is the exclusive OR (EX-OR) of all characters

from STX to ETX.

If the BCC check is set to "Disabled" in the communications settings in this product, this

code (BCC) will not be incorporated in the response message. See "2. Settings regarding
TOHO communications."

⑧ ACK

It is an acknowledge code. If a message received by this product is error-free, this code will

be incorporated in the "response message" from this product and returned.

⑨ NAK

It is a negative acknowledge code. If a "request message" received by this product is

error-ridden, this code will be incorporated in the "response message" from this product and
returned.

If the "request message" received is error-ridden, the error contents (⑩ ERR type) will be

incorporated in the "response message" from this product, following NAK.

⑩ ERR type

If a "request message" received from this product is error-ridden, the error contents (either

of the numbers in the table below) will be incorporated in the "response message" from this
product, following "⑨ NAK."

The error number 0 is an instrument error (memory error or A/D conversion error). It will

be incorporated in the "response message" regardless of whether there is an error in the
"request message."

The error number 9 is an AT error. It will therefore be incorporated in the "response

message" regardless of whether there is an error in the "request message." Remove the
cause of the error immediately and start the AT again.

If there are two or more errors occurring at the same time, the largest error number will be

incorporated.

The table below indicates the error contents and classifications.

12

3.6 Communications precautions

3.6.1 Communications timing

Set a sufficient response delay to make sure that this product is switched over from transmission to
reception with regard to a high-level computer in using an RS-485.

See the figure in "3.1 Communications procedure" and "2.8 Setting a response delay."

3.6.2 Interval between requests

In transmitting a series of "request messages" from a high-level computer, allow for an interval of
1msec or more from the reception of a "response message" from this product to a next
transmission.

3.6.3 Response conditions

This product will not return a "response message" unless it receives a "request message" containing
an STX and ETX (BCC).

If, therefore, the "request message" is error-ridden, this product will not return a "response
message" (error reply) containing a NAK and ERR unless the conditions mentioned above are met.

Therefore, the high-level computer transmits the necessary "request message" again if a "request
message" is sent to this product but the latter does not return a "response message" at the end of an
appropriate period.

The moment this product receives an STX, it clears all codes received before that.

3.6.4 Errors in address specification

This product will not respond to any "request message" that specifies an address other than that
specified for itself. If, therefore, the address portion of a "request message" is error-ridden, none of
the mobile units will return a "response message."

Therefore, the high-level computer transmits the necessary "request message" again if a "request
message" is sent to this product but the latter does not return a "response message" at the end of an
appropriate period.

The moment this product receives an STX, it clears all codes received before that.

3.6.5 Number of digits in data and the decimal position

See "3.5 Description of codes, ⑤ Numerical data."

3.6.6 Operation after receiving a store request message

This product starts to store data after correctly receiving a store request message from a high-level
computer.

This product only stores data different from the contents of the EEPROM (data that is changed).
The time (TW) required for storing data is within 6 seconds.

This product transmits a storage-complete reply (ACK) when the data is stored.
This product will not guarantee that the data is stored if this product is turned off during a storage

operation. Do not turn off this product for 6 seconds after transmitting a store request message.

3.6.7 Operation after turning on the power

This product will not perform communications (no response) for about 4 seconds after it is turned
on. Allow for a delay until communications is started after this product is turned on.

13

3.6.8 Storing data other than a store request message

Store all parameters in the EEPROM in either of the two cases described below, even if no store
request message is received.

1) If a parameter is changed by key operation

2) If auto-tuning is started and ends normally.

3.6.9 Changing the settings (SV or SV2) by communications during auto-tuning

Even if the settings (SV or SV2) used in control for auto-tuning are changed by communications,
the settings (SV or SV2) will not be changed until the auto-tuning ends.

14

4. Examples of TOHO communications

Code Code, data

ASCII

code, note 2)

①

Start code

STX 02H

②

Address

27

32H 37H

③

Request contents

R (Read)

52H

④

Identifier, note 1)

PV1 50H 56H 31H

⑤

Numerical data

00777

30H 30H 37H 37H 37H

⑥

End code

ETX 03H

⑦

BCC data request

61H

response

02H

⑧

Acknowledg

e code

ACK 06H

4.1 Examples of communications to be read

Example: Request message: This requests this product set at address 27 to read the PV.
(High-level computer)

In response to that,

Response message: This returns PV data (00777).
(This product)

Read request message (transmitted from the high-level computer)

Ｓ
Ｔ

２

７

Ｒ

Ｐ

Ｖ

Ｘ

①

②

③

④

｜

Ｂ

Ｅ

Ｃ

Ｔ

１

Ｃ

Ｘ

｜

⑥

⑦

Ｓ
Ｔ
Ｘ

①

Note 1): See "9. Table of identifiers (codes)."
Note 2): For the ASCII codes, see "10. Table of ASCII codes."

Ａ
Ｃ

２

７

Ｐ

Ｖ

１

０

０

７

７

７

Ｋ

②

⑧

｜

④

｜

｜

｜

｜

｜

⑤

Ｂ

Ｅ

Ｃ

Ｔ

Ｃ

Ｘ

⑥

⑦

15

4.2 Examples of communications to be written

Code Code, data

ASCII code, note 2)

①

Start code

STX 02H

②

Address

03

30H 33H

③

Request contents

W (Write)

57H

④

Identifier, note 1)

E1F 41H 34H 46H

⑤

Numerical data

00135

30H 30H 30H 31H 31H

⑥

End code

ETX 03H

⑦

BCC data request

53H

response

04H

⑧

Acknowledge code

ACK 06H

Example: Request message: This requests this product set at address 03 to set "the E1F setting to
(High-level computer) 011" (write 011).

(This sets the function in event 1 to the deviation upper and lower

limits + hold.)

In response to that,

Response message: This returns a notice that the request message has been received.
(This product)
*Check that it has been written by reading the data separately.

Write request message (transmitted from a high-level computer)

Ｓ

０

３

Ｗ

Ｅ

１

Ｆ

０

０

０

Ｔ

１

Ｘ

①

②

③

｜

④

｜

｜

｜

⑤

｜

Ｂ

Ｅ

１

Ｃ

Ｔ

Ｃ

Ｘ

⑥

⑦

｜

Ｓ
Ｔ
Ｘ

①

Note 1): See "9. Table of identifiers (codes)."
Note 2): For the ASCII codes, see "10. Table of ASCII codes."

Ａ

０

②

Ｅ

３

Ｃ

Ｔ

Ｋ

Ｘ
⑥⑦⑧

Ｂ
Ｃ
Ｃ

16

5. Settings regarding MODBUS communications

: MODBUS (RTU) (Initial value: )

: MODBUS (ASCII) (Initial value: )

5.1 Overview

Before communications is performed, initial settings must be made on this product. Enter such
settings with the keys on the front panel.

To switch to a series of setting screens, take the steps described below.
For details, see the operation manual furnished with this product.

For MODBUS (RTU) For MODBUS (ASCII)

Power ON

↓ ↓

↓ ↓

↓ MODE key at least 2 seconds ↓ MODE key at least 2 seconds

↓ ▲▼key ↓ ▲▼key

↓ MODE key ↓ MODE key

↓ MODE key ↓ MODE key

Initial setting (for 4 seconds)

Operation mode

Setting mode selection screen

Communications setting mode

Set a communications protocol

Set a communications parameter

Power ON

Initial setting (for 4 seconds)

Operation mode

Setting mode selection screen

Communications setting mode

Set a communications protocol

Set a communications parameter

↓ MODE key ↓ MODE key

↓ MODE key ↓ MODE key

↓ MODE key ↓ MODE key

↓ MODE key ↓ MODE key

↓ MODE key ↓ MODE key

Back to communications setting mode Back to communications setting mode

Set a communications speed

Set a communications address

Set a communications response delay

Set communication mode changeover
*The changeover setting is disabled.

Set a communications speed

Set a communications address

Set a communications response delay

Set communication mode changeover
*The changeover setting is disabled.

When the settings are over, press the MODE key at least 2 seconds to go back to the operation mode.

17

5.2 Setting a data length

Stop bit 1

Stop bit 2

No parity

Odd parity

Even parity

Data length, 7 bits

Data length, 8 bits

1200 BPS

2400 BPS

4800 BPS

9600 BPS

19200 BPS

5.3 Setting a stop bit length

5.4 Setting a parity

5.5 Setting a BCC check

The BCC check is disabled.
Initial value of MODBUS (RTU): Initial value of MODBUS (ASCII):

＊＊＊

* The RTU mode settings come only in three types:

The ASCII mode settings come only in three types:

、 、

、 、

.

.

5.6 Setting a communications speed

While in the "Set a communications speed" screen on the preceding page, operate the ▲ and ▼ keys

to make the settings. The initial value is .

＊＊＊＊

5.7 Setting an address

While in the "Set a communications address" screen on the preceding page, operate the ▲ and ▼
keys to make the settings. The initial value is .

Setting range: 1 to 247 stations (It cannot be set to a 0.)

18

5.8 Setting a response delay

Read/Write

Read-only

Set a time from the time when the high-level computer finished sending a "request message" until
the time when it delivers the line and enters an input state.

While in the "Set a response delay" on the preceding page, operate the ▲ and ▼ keys to make the

settings. The initial value is 0.

Setting range: 0 to 250msec

* If the response delay is set to a short setting, the communications may not be conducted normally.
* In a real operation, the processing time for this product will be added, in addition to the response

delay.

5.9 Switching communications mode

While in the "Set communication mode changeover" screen on page 17, operate the ▲ and ▼ keys

and make a setting.

* The changeover setting is disabled.

19

6. MODBUS communications control

6.1 Communications procedure

This product returns a "response message" in response to a "request message" from a high-level
computer. It therefore does not initiate a transmission.

6.2 Message types

Messages are roughly divided into the following types:

Request message (transmitted

from a high-level computer)

Read request message

Write request message

Response message (transmitted

from this product)

Receipt acknowledgement and data

response

Write complete response

Reception error and error description

response

Store request message

: Response when a normal "request message" is received

: When a received "request message" contains an error

Store complete response

In RTU codes, the data is binary.
In ASCII codes, all codes are expressed in ASCII codes.
In assembling a program for a high-level computer, see "9. Table of identifiers (codes)" and "10.

Table of ASCII codes" at the end of the book.

20

6.3 Composition of an RTU request message (transmitted from a high-level computer

a) Slave address

1BH b)

Function code

03H

High level

00H

Low level

00H

High level

00H

Low level

02H

Low level 31H High level C6H

a) Slave address

03H

b) Function code

10H

High level

00H

Low level

C0H

High level

00H

Low level

02H

f) Number of data items

04H Number of registers

2

High level

00H

③

When writing

, and ④

Low level

6FH

④

High level

00H

① Low level

00H

②

Low level 5AH

High level C4H

a) Slave address

03H b)

Function code

10H

High level

02H

Low level

0EH

High level

00H

Low lev

el 02H f) Number of data items

04H Number of registers

2

High level

00H

Low level

00H

Hi

gh level

00H

Low level

00H

Low level FBH High level 60H

to this product)

For codes a) through i), see "6.5 Description of RTU codes."

6.3.1 Composition of a read request message

c) Register address

d) Number of registers

e) CRC-16

6.3.2 Composition of a write request message

c) Register address

d) Number of registers

Data for the first register
(a low-level word)

g)

Data for the first register + 1
(a high-level word)

First register address

Fixed at 2

First register address

Fixed at 2

①, ②, ③

H in the data, write them in the
order described on the left-hand
side. (① represents 1 byte.)

e) CRC-16

6.3.3 Composition of a store request message

c) Register address

d) Number of registers

Data for the first register
(a low-level word)

g)

Data for the first register + 1
(a high-level word)

e) CRC-16

First register address

Fixed at 2

The data about the storage of settings is
arbitrary.

21

6.4 Composition of an RTU response message

a) Slave address

1BH b)

Function code

03H d)

Number of data items

04H Number of registers

2

High level

03H

③

When writing

, and ④

Low level

09H

④

High level

00H

①

Low level

00H

②

Low level B4H

High level 91H

a) Slave address

03H b)

Function code

10H

High level

00H

Low level

00H

High level

00H

Low level

02H

Low level 2AH High level 40H

a) Slave address

1BH b)

Function code

83H

In the case of an error, the function

h) Error

code 02H

Low level 36H

High level E1H

(transmitted from this product to a high-level computer)

For codes a) through h), see "6.5 Description of RTU codes."

6.4.1 Response message for a read request message

Data for the first register
(a low-level word)

g)

Data for the first register + 1
(a high-level word)

e) CRC-16

6.4.2 Response message for a write/store request message

c) Register address

d) Number of registers

e) CRC-16

6.4.3 Response message in the case of an error

H in the data, write them in the

①, ②, ③

order described on the left-hand
side. (① represents 1 byte.)

First register address

Fixed at 2

code for the request message + 80H is
entered.

e) CRC-16

22

6.5 Description of RTU codes

The codes from a) slave address to b) function code to h) error code shown below are expressed

in 8-bit binary numbers.

a) Slave address

This is the address of the party (this product) with which the high-level computer

communicates. The address in the response message from this product represents the source
of the response message. Note that, when CH2 is used, 2 addresses are occupied. (When the
ADR is set to 1, addresses 1 and 2 are occupied.)

b) Function code

Enter a code 03H or 10H.

03H: To read data from this product
10H: To write or store data in this product

c) Register address

The locations of the data to be read or that to be written are specified in 2 bytes.

For the addresses of the commands, see "9. Table of identifiers (codes)."

The data is written in the holding register.

d) Number of registers

This specifies the number of registers to be written in. Since this product has a fixed number

of registers (which is 2), specify 0002H.

e) CRC-16

This error check code is for detecting message errors. This transmits a CRC-16 (tour

redundancy code).
The multinomial for generating a CRC-16 used in this product is X16+X15+X2+1.
To learn how to calculate the CRC-16, see "6.7 Example of CRC-16 calculations."
To affix an error code at the end of the message, affix the low-level byte first, then the

high-level byte of the CRC.

f) Number of data
This specifies the number of registers to be read and written x 2. Since the number of

registers in this product is fixed at 2, specify 04H here.

23

g) Data portion

Example

Significance of the value

Proportional band (P) = 1.0 %

0 0 00 0 0 0A H

PV = 1200.0

C 0 0 00 2E E0 H

SV =

-

10.00

C F F FF FC 18 H

Error No.

Error contents in the "request message" receive

d by this product

01

Received an unsupported function code.

02 Received an address other than the specified one.

03 The numerical data deviated from the "range of settings designated specifically with

setting items."

04

Instrument error (memory error o

r A/D conversion error, AT error)

This specifies data to be written in the register. The data is fixed at 4 bytes. This product

will write data without the decimal point.

Example: In the case of numerical data

Example: In the case of text data, write the ASCII code "□" (□ is a space)

Content of Communication HEX Data

Priority Screen 0-1 ＝ □ＩＮＰ

Priority Screen 0-2 ＝ □ＭＶ１

Priority Screen 0-3 ＝ □□Ｐ１

20494E50H

204D5631H

20205031H

h) Error code
If a message from a high-level computer is error-ridden, it will be incorporated in the

"response message" from this product and returned.
The error number "04" is an instrument error (memory error or A/D conversion error, AT

error). It will be incorporated in the "response message" regardless of whether there is an

error in the "request message."
If there are two or more errors occurring at the same time, the largest error number will be

incorporated.

The table below indicates the error contents and classifications.

24

6.6 Precautions on RTU communications

6.6.1 Communications timing

Set a sufficient response delay to make sure that this product is switched over from transmission to
reception with regard to a high-level computer in using an RS-485.

See the figure in "6.1 Communications procedure" and "5.8 Setting a response delay."

6.6.2 Interval between requests

In transmitting a series of "request messages" from a high-level computer, allow for an interval of
1msec or more or 3.5 character minutes, whichever the longer, from the reception of a "response
message" from this product to a next transmission.

6.6.3 Response conditions

If there is a time interval of 3.5 characters or more between data items constituting a "request
message," this product cannot recognize it as a "request message." It will therefore not return a
"response message." If, therefore, the "request message" contains an error, this product will not
return a "response message" (error reply) containing an ERR unless the above conditions are met.

Therefore, the high-level computer transmits the necessary "request message" again if a "request
message" is sent to this product but the latter does not return a "response message" at the end of an
appropriate period.

The moment a period of 3.5 characters or more has elapsed, it clears all codes received before that.

6.6.4 Errors in address specification

This product will not respond to any "request message" that specifies an address other than that
specified for itself. If, therefore, the address portion of a "request message" is error-ridden, none of
the mobile units will return a "response message."

Therefore, the high-level computer transmits the necessary "request message" again if a "request
message" is sent to this product but the latter does not return a "response message" at the end of an
appropriate period.

6.6.5 Number of digits in data and the decimal position

See "6.5 Description of RTU codes, g) Data portion."

6.6.6 Operation after receiving a store request message

This product starts to store data after correctly receiving a store request message from a high-level
computer.

This product only stores data different from the contents of the EEPROM (data that is changed).
The time (TW) required for storing data is within 6 seconds.

This product transmits a storage-complete reply after the data is stored.
This product will not guarantee that the data is stored if this product is turned off during a storage

operation. Do not turn off this product for 6 seconds after transmitting a store request message.

6.6.7 Operation after turning on the power

This product will not perform communications (no response) for about 4 seconds after it is turned
on. Allow for a delay until communications is started after this product is turned on.

25

6.6.8 Storing data other than a store request message

This product will store all parameters in the EEPROM in either of the two cases described below,
even if no store request message is received.

1) If a parameter is changed by key operation

2) If auto-tuning is started and ends normally.

6.6.9 Changing the settings (SV or SV2) by communications during auto-tuning

Even if the settings (SV or SV2) used in control for auto-tuning are changed by communications,
the settings (SV or SV2) will not be changed until the auto-tuning ends.

6.7 Example of CRC-16 calculations

Following is an example of calculating CRC-16 with VisualBasic6.0.

Variables are declared as shown below.
VisualBasic6.0 cannot use code-free variables. It therefore uses code-equipped 16-bit integer

variables as data. Similarly, the CRC calculation results are entered into code-equipped 32-bit
integer variables.

Dim CRC As Long
Dim i, j, arry_count As Integer

Dim c_next, c_carry As LongDim crc_arry(64) As Integer

Then enter calculable data into the crc_arry(), and enter the number of data items into the arry_count.
After that, run the following program to cause the calculation results to enter the CRC.

i = 0
CRC = 65535
For i = 0 To arry_count
c_next = crc_arry(i)
CRC = (CRC Xor c_next) And 65535
For j = 0 To 7
c_carry = CRC And 1
CRC = CRC ¥ 2
If c_carry Then
CRC = (CRC Xor &HA001) And 65535
End If
Next
Next

To affix an error code to the end of the message, affix first the low-level byte and then the high-level
byte of the CRC.

26

6.8 Composition of an ASCII request message

a) Start code

“:” b)

Slave address

“1” , “B”

c) Function code

“0” , “3”

High level

“0” , “0”

Low level

“0” , “0”

High level

“0” ,

“0”

Low level

“0” , “2”

f)

LRC “E” , “0”

g) End code

CR, LF

a) Start code

“:”

b) Slave address

“0” , “3”

c) Function code

“1” , “0”

High level

“0” , “0”

Low level

“C” , “0”

High level

“0” , “0”

Low level

“0” , “2”

h) Number of data items

“0” , “4”

Number of registers

2

High level

“0” , “0”

③

When writing

, and ④

Low level

“6” , “F”

④

High level

“0” , “0”

①

Low level

“0” , “0”

②

f) LRC “E” , “0”

g) End code

CR, LF

(transmitted from a high-level computer to this product)

For the codes a) through g), see "6.10 Description of ASCII codes."

6.8.1 Composition of a read request message

d) Register address

e) Number of registers

6.8.2 Composition of a write request message

d) Register address

e) Number of registers

Data for the first register
(a low-level word)

i)

Data for the first register + 1
(a high-level word)

First register address

Fixed at 2

First register address

Fixed at 2

①, ②, ③

H in the data, write them in the
order described on the left-hand
side. (① represents 1 byte.)

27

6.8.3 Composition of a store request message

a) Start code

“:” b)

Slave address

“0” , “3”

c) Function code

“1” , “0”

High level

“0” , “2”

Low level

“0” , “E”

High level

“0” , “0”

Low level

“0” , “2”

h)

Number of data items

“0” , “4”

Number of registers

2

High level

“0” , “0”

Low level

“0” , “0”

High level

“0” , “0”

Low level

“0” , “0”

f) LRC “D” , “7”

g)

End code

CR, LF

d) Register address

e) Number of registers

Data for the first register
(a low-level word)

i)

Data for the first register + 1
(a high-level word)

First register address

Fixed at 2

The data about the storage of settings is
arbitrary.

28

6.9 Composition of ASCII response messages

a) Start code

“:” b)

Slave address

“1” , “B”

c) Function code

“0” , “3”

h) Number of data items

“0” , “4” Number of registers

2

High level

“0” , “3”

③

When writing

, and ④

Low level

“0” , “9”

④

High level

“0” , “0”

①

Low level

“0” , “0”

② f)

LRC “D” , “2”

g)

End code

CR, LF

a) Start code

“:”

b) Slave address

“0” , “3”

c)

Function code

“1” , “0”

High level

“0” , “0”

Low level

“0” , “0”

High level

“0” , “0”

Low level

“0” , “2”

f) LRC “E” , “B”

g) End code

CR, LF

a) Start code

“:”

b) Slave address

“1” , “B”

h) Function code

“8” , “3”

In the case of an error, the function

j) Error code

“0” , “2”

f)

LRC “6” , “0”

g) End code

CR, LF

(transmitted from this product to a high-level computer)

For the codes a) through g), see "6.10 Description of ASCII codes."

6.9.1 Response message for a read request message

Data for the first register
(a low-level word)

i)

Data for the first register + 1
(a high-level word)

6.9.2 Response message for a write/store request message

d) Register address

e) Number of registers

6.9.3 Response message in the case of an error

H in the data, write them in the

①, ②, ③

order described on the left-hand
side. (① represents 1 byte.)

First register address

Fixed at 2

code for the request message + 80H is
entered.

29

6.10 Description of ASCII codes

The codes from a) start code to b) slave address to j) error type described below are expressed

in ASCII codes.
For ASCII codes, see "10. Table of ASCII codes."
For converting to ASCII codes, see 6.8 and 6.9 "Message composition."

a) Start code

The receiver side is the code required for detecting the top of the message. It is affixed to

the top of a character string to be transmitted.

b) Slave address

This is the address of the party (this product) with which the high-level computer

communicates. The address in the response message from this product represents the
source of the response message. Note that, when CH2 is used, 2 addresses are occupied.
(When the ADR is set to 1, addresses 1 and 2 are occupied.)

c) Function code

Enter a code 03H or 10H.

03H: To read data from this product
10H: To write or store data in this product

d) Number of registers

This specifies the number of registers to be written in. Since this product has a fixed

number of registers (which is 2), specify 0002H.

e) Register address

The locations of the data to be read or that to be written are specified in 2 bytes.

For the addresses of the commands, see "9. Table of identifiers (codes)."

f) LRC

LRC is an error check code for detecting message errors. An LRC is transmitted. The LRC

used in this product is the 2-complement of the sum of the data portions without a carry,

except for the start code and end code of the message.
The parts of the data portions expressed as a "1" and "B" are considered as "1BH."
To learn how to calculate the LRC, see "6.12 Example of LRC calculations."
If 12H is calculated as an error code, affix a "1" or "2" at the end of the message.

g) End code
This code is required for the receiver to detect the end of a message. Affix CR (0DH) and

LF (0AH) at the end of a character string to be transmitted.

h) Number of data
This specifies the number of registers to be read and written x 2. Since the number of

registers in this product is fixed at 2, specify 04H here.

30

i) Data portion

Example

Significance of the v

alue Proportional band (P) = 1.0 %

0 0 00 0 0 0A H

PV = 1200.0

C 0 0 00 2E E0 H

SV =

-

10.00

C F F FF FC 18 H

Err

or No.

Error contents in the "request message" received by this product

01 Received an unsupported function code.

02 Received an address other than the specified one.

03 The numerical data deviated from the "range of settings designated specifically wit

h

setting items."

04

Instrument error (memory error or A/D conversion error, AT error)

This specifies data to be written in the register. The data is fixed at 4 bytes. This product

will write data without the decimal point.

Example: In the case of numerical data

Example: In the case of text data, write the ASCII code "□" (□ is a space)

Content of Communication HEX Data

Priority Screen 0-1 ＝ □ＩＮＰ

Priority Screen 0-2 ＝ □ＭＶ１

Priority Screen 0-3 ＝ □□Ｐ１

20494E50H

204D5631H

20205031H

j) Error code

If a message from a high-level computer is error-ridden, it will be incorporated in the

"response message" from this product and returned.

The error number "04" is an instrument error (memory error or A/D conversion error, AT

error). It will be incorporated in the "response message" regardless of whether there is an
error in the "request message."

If there are two or more errors occurring at the same time, the largest error number will be

incorporated.

The table below indicates the error contents and classifications.

31

6.11 Precautions on ASCII communications

6.11.1 Communications timing

Set a sufficient response delay to make sure that this product is switched over from transmission
to reception with regard to a high-level computer in using an RS-485.

See the figure in "6.1 Communications procedure" and "5.8 Setting a response delay."

6.11.2 Interval between requests

In transmitting a series of "request messages" from a high-level computer, allow for an interval of
1msec or more or 3.5 character minutes, whichever the longer, from the reception of a "response
message" from this product to a next transmission.

6.11.3 Response conditions

This product will not return a "response message" unless the "request message" contains a start
code and end code.

If, therefore, the "request message" contains an error, this product will not return a "response
message" (error reply) containing an error code unless the above conditions are met.

Therefore, high-level computer transmits the necessary "request message" again if a "request
message" is sent to this product but the latter does not return a "response message" at the end of
an appropriate period.

The moment a start code is received, this product clears all codes received before that.

6.11.4 Errors in address specification

This product will not respond to any "request message" that specifies an address other than that
specified for itself. If, therefore, the address portion of a "request message" is error-ridden, none
of the mobile units will return a "response message."

Therefore, the high-level computer transmits the necessary "request message" again if a "request
message" is sent to this product but the latter does not return a "response message" at the end of
an appropriate period.

The moment a start is received, this product clears all codes received before that.

6.11.5 Number of digits in data and the decimal position

See "6.10 Description of ASCII codes, i) Data portion."

6.11.6 Operation after receiving a store request message

This product starts to store data after correctly receiving a store request message from a
high-level computer.

This product only stores data different from the contents of the EEPROM (data that is changed).
The time (TW) required for storing data is within 6 seconds.

This product transmits a storage-complete reply after the data is stored.
This product will not guarantee that the data is stored if this product is turned off during a storage

operation. Do not turn off this product for 6 seconds after transmitting a store request message.

6.11.7 Operation after turning on the power

This product will not perform communications (no response) for about 4 seconds after it is turned
on. Allow for a delay until communications is started after this product is turned on.

32

6.11.8 Storing data other than a store request message

This product will store all parameters in the EEPROM in either of the two cases described below,
even if no store request message is received.

1) If a parameter is changed by key operation

2) When the auto-tuning is activated and ends normally, only PID constant will be written.

6.11.9 Changing the settings (SV or SV2) by communications during auto-tuning

Even if the settings (SV or SV2) used in control for auto-tuning are changed by communications,
the settings (SV or SV2) will not be changed until the auto-tuning ends.

33

6.12 Example of LRC calculations

Following is an example of calculating LRC with VisualBasic6.0.

Variables are declared as shown below.
VisualBasic6.0 cannot use code-free variables. It therefore uses code-equipped 16-bit integer

variables as data. Similarly, the LRC calculation results are entered into code-equipped 16-bit
integer variables.

Dim LRC As Integer
Dim i, arry_count As Integer

Dim lrc_arry(128) As Integer

Then enter calculable data into the 1rc_arry(), and enter the number of data items
into the arry_count

After that, run the following program to cause the calculation results to enter the LRC.

For i = 0 To arry_count
LRC = (LRC + lrc_arry(i)) And &HFF
Next

LRC = ((Not LRC) + 1) And &HFF

If the error code is calculated as 12H as an example, affix a "1" or "2" at the end of the message.

34

7. Specifications

7.1 Communications standard category

Compliant with EIA standard RS-485

7.2 Communications specifications

7.2.1 Communications system

Network: ........................................ Multi-drop system (up to 1 pair, 31 stations)

Direction of information: ............... Half duplex

Synchronization system: ................ Asynchronous

Transmission code: ........................ ASCII, 7 bit code, except for BCC data

(highest-level bit = 0 in 8-bit code)

7.2.2 Interface system

Signal line: ..................................... 2 lines for transmission and reception

Communications speed: ................. 1,200, 2,400, 4,800, 9,600 and 19,200 bps and this product is

set to it.

Communications distance: ............. 500m maximum

Provided that it varies somewhat depending on the cable and other ambient conditions.

7.2.3 Character

1) TOHO communications protocols

Start bit length: ......................... Fixed at 1 bit

Stop bit length: ......................... Either 1 or 2 bit is selected and this product is set to it.

Data length: .............................. Either 7 or 8 bit is selected and this product is set to it.

Parity: ....................................... No. Either odd or even is selected and this product is set to it.

BCC check:............................... Yes or no is selected and this product is set to it.

Communications address: ......... 1-99

2) MODBUS communications (RTU) protocols

Start bit length: ......................... Fixed at 1 bit

Stop bit length: ......................... Either 1 or 2 bit is selected and this product is set to it.

(If parity-equipped, fixed at 1 bit.)

Data length: .............................. Fixed at 8 bit.

Parity: ....................................... No. Either odd or even is selected and this product is set to it.

CRC-16 check: ......................... Fixed at yes.

Communications address: ......... 1-247

3) MODBUS communications (ASCII) protocols

Start bit length: ......................... Fixed at 1 bit

Stop bit length: ......................... Either 1 or 2 bit is selected and this product is set to it.

(If parity-equipped, fixed at 1 bit.)

Data length: .............................. Fixed at 7 bit.

Parity: ....................................... No. Either odd or even is selected and this product is set to it.

LRC check: ............................... Fixed at yes.

Communications address: ......... 1-247

4) MODBUS communications (RTU/ASCII) function codes
03H (reading the contents of the holding register)
10H (writing the contents of two or more holding registers)

35

8. Connections

Host Computer

(Master Station)

A(+)

B(-)

Cable①

terminating

resistor

①

Cable②

Cable③

Unit1

(Slave Station）

A(+)

B(-)

Unit2

(Slave Station）

A(+)

B(-)

Unit3

(Slave Station）

A(+)

terminatin

g resistor

②

○Above drawing shows example of connecting 1 to 3 slave stations to a master station.

◇ Use cables with the same characteristic impedance for cables ① to ③.

- For slave station nos. 1 to 3, connect them dependently as shown in the drawing.

The same characteristic impedance cables are used for the connections between

the slave stations.

◇ Attach terminating resistor to both the master station side ① and the farthest ② ones among the

slave stations (no. 3).

◇ Make sure to select terminating resistor in order that the [Characteristic Impedance from cables ①

to ③] = [Resistance Value of ①] = [Resistance Value of ②]

- Furthermore, use characteristic impedance cable whose [Resistance Value of ①] // [Resistance

Value of ②] (parallel combination resistance value) becomes above 75-ohms.

B(-)

36

9. Table of identifiers (codes)

Relative

address

Absolute

address

When underscale: LL

LLL

Example:

INP (identifier)

Example: □□INP (identifier)

Example: □□INP (identifier)

Example: □□INP (identifier)

Example: □□INP (identifier)

Example: □□INP (identifier)

Example: □□INP (identifier)

Example: □□INP (identifier)

Example: □□INP (identifier)

Decimal point: 00001

For the setting range, options, initial values, and similar parameters, see the operation manual for

this system.
a) Identifier: This code represents an item. Enter this code in the identifier field in the

message. The □ in the frame represents an SP (ASCII code: 20H).
b) Character: The character to be displayed on the system screen.
c) Name: Item name
d) R/W: This specifies which is possible: reading, writing, or both.
e) Description:

Note: The R/W to characters that do not meet the display conditions responds with "NAK2."

Example: If no EV2 option is selected, the R/W to the EV2 character becomes "NAK2."

Identifier

PV1 0000h 40001 Setting value (PV) R Use it as monitor for measurements (PV).

SV1 0002h 40003

PR1 0004h 40005

PR2 0006h 40007

PR3 0008h 40009

PR4 000Ah 40011

PR5 000Ch 40013

PR6 000Eh 40015

PR7 0010h 40017

PR8 0012h 40019

PR9 0014h 40021

INP 0016h 40023

PVG 0018h 40025

PVS 001Ah 40027

PDF 001Ch 40029

□DP 001Eh 40031

Character

Setting value (SV) R/W R/W the setting value (SV)

Setting for 1st Priority display R/W RW the priority screen function setting 1

Setting for 2nd Priority display R/W RW the priority screen function setting 2

Setting for 3rd Priority display R/W RW the priority screen function setting 3

Setting for 4th Priority display R/W RW the priority screen function setting 4

Setting for 5th Priority display R/W RW the priority screen function setting 5

Setting for 6th Priority display R/W RW the priority screen function setting 6

Setting for 7th Priority display R/W RW the priority screen function setting 7

Setting for 8th Priority display R/W RW the priority screen function setting 8

Setting for 9th Priority display R/W RW the priority screen function setting 9

Input type setting R/W R/W the input type setting

PV correction gain R/W R/W the PV corrected gain setting

Zero point setting for PV correction R/W R/W the PV corrected zero point setting

Filter input R/W R/W the input filter setting

Position for decimal point R/W R/W the decimal position setting

Name R/W

Description

When overscale: HHHHH

No decimal point: 00000

□FU 0020h 40033

LOC 0022h 40035

SLH 0024h 40037

SLL 0026h 40039

FUNC key setting R/W R/W the function key function setting

Key lock setting R/W R/W the key lock setting

High limit setting in SV limiter R/W R/W the SV limiter upper limit setting

Low limit setting in SV limiter R/W R/W the SV limiter lower limit setting

37

Relative

address

Absolute

address

□MD 0028h

40041

Control mode

setting

R/W R/W the control mode setting

Auto-tuning in progress:

00003

CNT 002Ah

40043

S

election of

control type

setting

R/W R/W the control type se

tting DIR 002Ch

40045

Change of normal or reverse

R/W R/W the forward/reverse operation

switchover setting

MV1 002Eh

40047

Manipulated value

for o

utput 1

R/W R/W the output 1 operation amount

TUN 0030h

40049

Set

for PID

tuning type

R/W R

/W the tuning type setting

ATG 0032h

40051

AT

coefficient setting

R/W R/W the AT factor

ATC 0034h

40053

AT sensitivity

setting

R/W R/W the AT sensitivity

□P1 0036h

40055

P

roportional band

set

ting

for

output

1

R/W R/W the output 1 proporti

onal band setting

□I1 0038h

40057

I

ntegral time

setting

R/W R/W the integral time setting

□D1 003Ah

40059

D

erivative time

setting

R/W R/W the derivative time setting

□T1 003Ch

40061

P

roportional

cycle setting

For

output 1

R/W R/W the out

put 1 proportional frequency

setting

ARW 003Eh

40063

ARW(

Anti-reset windup

) setting

R/W R/W the anti

-

reset windup

MH1 0040h

40065

High limit setting of manipulated

value for output 1

R/W R/W the amount

-of-

operation limiter upper

limit setting

ML1 0042h

40067

Low limit setting of manipulated

value for output 1

R/W R/W the amount

-of-

operation limiter lower

limit setting

□C1 0044h

40069

C

ontrol sensitivity

set

ting

for output 1

R/W R/W the output 1 control sensitivity setting

CP1 0046h

40071

OFF

position

setting for

output 1

R/W R/W the output 1 off

-

point position setting

MV2 0048h

40073

Manipulated value for o

utput 2

R/W R/W the output 2 operation amount

□P2 004Ah

40075

P

roportional band

set

ting

for

output

2

R/W R/W t

he output 2 proportional band setting

□T2 004Ch

40077

P

roportional

cycle setting for

output

2

R/W R/W the output 2 proportional frequency

setting

MH2 004Eh

40079

High limit setting of manipulated

value for output 2

R/W R/W the amount

-of-

operati

on limiter upper

limit setting

ML2 0050h

40081

Low limit setting of manipulated

value for output 2

R/W R/W the amount

-of-

operation limiter lower

limit setting

□C2 0052h

40083

C

ontrol sensitivity

setting

for output

2

R/W R/W the output 2 contro

l sensitivity setting

CP2 0054h

40085

OFF

position

setting

for

output

2

R/W R/W the output 2 off

-

point position setting

PBB 0056h

40087

Manual reset

setting

R/W R/W the manual reset

□DB 0058h

40089

D

ead band

setting

R/W R/W the dead band

setting

RP1 005Ah

40091

SV Ramp variation setting

R/W R/W the SV lamp time setting

RP2 005Ch

40093

SV2 Ramp variation setting

R/W R/W the SV2 lamp time setting

E1F 005Eh

40095

F

unction

setting for EV1

R/W R/W the PV event output 1 functi

on setting

E1H 0060h

40097

High limit setting for EV1

R/W R/W the event output 1 upper limit setting

E1L 0062h

40099

Low limit setting for EV1

R/W R/W the event output 1 lower limit setting

E1C 0064h

40101

Control

sensitivity

setting

R/W R/W the event output 1 sensitivity setting

E1T 0066h

40103

D

elay time

setting for EV1

R/W R/W the event output 1 delay timer setting

Identifier

Character

Name R/W

Description

Control execution: 00000
Manual control: 00001
Control stop: 00002

for EV1

38

Identifier

Relative

address

Absolute

address

E1B 0068h

40105

Abnormal

for EV1

R/W R/W the special event output 1 function

setting

E1P 006Ah

40107

P

olarity

setting for EV1

R/W R/W the event output 1 polarity setting

CM1 006Ch

40109

CT input monitor

for EV1

R

Read the CT input monitor

CT1 006Eh

40111

A

bnorma

lity current

value of heater

for EV1

R/W R/W the event output 1 current abnormality

setting

E2F 0070h

40113

F

unction

setting for EV

2 R/W R/W the PV event output 2 function setting

E2H 0072h

40115

High limit setting for EV

2 R/W R/W the event out

put 2 upper limit setting

E2L 0074h

40117

High limit setting for EV

2 R/W R/W the event output 2 lower limit setting

E2C 0076h

40119

Control

sensitivity

setting

for EV

2

R/W R/W the event output 2 sensitivity setting

E2T 0078h

40121

D

elay

time setting for EV

2 R/W R/W the event output 2 delay timer setting

E2B 007Ah

40123

Abnormal

for EV

2 R/W R/W the special event output 2 function

setting

E2P 007Ch

40125

P

olarity

setting for EV2

R/W R/W the event output 2 polarity setting

CM2 0

07Eh 40127

CT input monitor

for EV2

R

Read the CT input monitor

CT2 0080h

40129

A

bnormality

current

value of heater

for EV2

R/W R/W the event output 2 current abnormality

setting

DIF 0082h

40131

F

unction

set

ting for DI R/W R/W the DI input

function setting

DIP 0084h

40133

P

olarity

set

ting for DI R/W R/W the DI polarity setting

SV2 0086h

40135

Setting for

SV2 R/W R/W the control setting 2

PRT 0088h

40137

C

ommunications protocol

setting

R/W R/W the communications protocol se

tting

MODBUS (ASCII):

00002

COM 008Ah

40139

P

arameter

setting for

communication

R/W R/W the communications parameter setting

Example: □B8N2

BPS 008Ch

40141

S

peed setting

R/W R/W the

communications speed setting

Example: 00096 (if 9600 bps)

ADR 008Eh

40143

A

ddress

setting

R/W R/W the communications address setting

AWT 0090h

40145

R

esponse delay

time setting

R/W R/W the response delay setting

MOD 0092h

40147

M

ode s

ele

ction setting

R/W R/W the communications mode switchover

RW: 00001

TMO 0094h

40149

T

imer output

setting

R/W R/W the timer output destination setting

TMF 0096h

40151

T

imer function

setting

R/W R/W the timer function setting

H/M 0098h

40153

Timer unit s

election

R/W R/W the timer unit switchover setting

TSV 009Ah

40155

T

imer SV start

permissible range

R/W R/W the timer SV start tolerance setting

TIM 009Ch

40157

T

imer time

setting

R/W R/W the timer time setting

TIA 009Eh

40159

T

imer r

esidual

time monitor

setting

R

Read the timer remaining time monitor

TRF 00A0h

40161

T

rans

fer output function

setting

R/W R/W the transmission output function setting

Character

Name R/W

Description

Special-purpose protocol: 00000
MODBUS (RTU): 00001

setting

RO: 00000

39

Relative

address

Absolute

address

TRP 00A2h

40163

Transfer output

normal

/reverse

sw

itch setting

R/W R/W the forward/reverse operation

switchover setting for transmission output

TRH 00A4h

40165

Transfer output

scaling

high limit setting

R/W R/W the uppe

r limit setting for transmission

output scaling

TRL 00A6h

40167

Transfer output

scaling

low limit setting

R/W R/W the lower limit setting for transmission

output scaling

TST 00A8h

40169

Timer start/stop

R/W R/W the timer start/stop

St

op: 00000

OM1 00AAh

40171

Output status monitor

R

Read the output monitor

: EV2 (1:ON 0:OFF)

EM1 00ACh

40173

DI status monitor

R

Read the DI monitor

ON: 00001 OFF: 00000

□AT 00AEh

40175

Start/release AT

R/W R/W the start/release AT

STR 00B0h

40177

Store data

W

Store data

Relative

address

Absolute

address

000

SET0 L/B Blinding enabled:

00000

Blinding disabled: 00001

001

SET1 L/B Blinding enabled: 00000

Blinding disabled: 00001

002

SET2 L/B Blinding enabled: 00000

Blinding disabled: 00001

003

SET3 L/B Blinding enabled: 00000

Blinding disabled: 00001

004

SET4

L/B Blinding enabled: 00000

Blinding disabled: 00001

005

SET5 L/B Blinding enabled: 00000

Blinding disabled: 00001

006

SET6 L/B Blinding enabled: 00000

Blinding disabled: 00001

007

SET7 L/B Blinding enabled: 00000

Blinding disable

d: 00001

008

SET8 L/B Blinding enabled: 00000

Blinding disabled: 00001

Identifier

Character

Identifiers used only in blind setting

Identifier

Character

Name R/W

Name L/B

Description

Start: 00001

①②③④⑤
⑤: OUT1 (1:ON 0:OFF)
④: OUT2 (1:ON 0:OFF)
③: EV1 (1:ON 0:OFF)
②

Description

40

10. Table of ASCII codes

Upper

Lower

00h 10h 20h 30h 40h 50h 60h 70h

00h

01h

02h

03h

04h

05h

06h

07h

08h

09h

0Ah

0Bh

0Ch

NUL DEL SPACE 0 @ P ` p

SOH DC1

STX DC2

ETX DC3

EOT DC4

ENQ NAK

ACK SYM

BEL ETB

BS CAN

HT EM ) 9 I Y i y

LF SUB

VT ESC

FF FS , < L ¥ l |

! 1 A Q a q

" 2 B R b r

# 3 C S c s

$ 4 D T d t

% 5 E U e u

& 6 F V f v

' 7 G W g w

( 8 H X h x

* : J Z j z

+ ; K [ k {

0Dh

0Eh

0Fh

CR GS - = M ] m }

SO RS . > N ^ n ~

SI US / ? O _ o DEL

※How to look at ASCII Code table

(ASCII Code) = (Upper Level) + (Lower Level)

Ex. 1) In case of “A”: (41h) = (40h) + (01h)

Ex. 2) In case of “M”: (6Dh) = (60h) + (0Dh)

41

TOHO ELECTRONICS INC.

Head office: 1-13-21, Tanashioda, Chuo-ku, Sagamihara-shi, Kanagawa 252-0245 Japan.

Phone: [phone] Fax: [phone]

49-7626-E

42