TOHO ELECTRONICS TTM-10L User Manual

TOHO ELECTRONICS INC.

Operation Manual, Communications

Model: TTM-10L Series Designation: Digital Board Controller

Thank you very much for purchasing a TTM-10L Series (with communications). Please read this operation manual carefully and use this product correctly.

Contents

1. Before using the product......................................................................................................3

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 communications.....................................................................................4

2.1 Overview

2.2 Setting a communications type

2.3 Setting a data length

2.4 Setting a stop bit length

2.5 Setting a parity

2.6 Setting whether to conduct a BCC check

2.7 Setting a communications speed

2.8 Setting an address

2.9 Setting a response delay time

3. Communications control......................................................................................................6

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 communications............................................................................................13

4.1 Examples of communications to be read

4.2 Examples of communications to be written

5. Specifications.....................................................................................................................15

5.1 Communications standard category

5.2 Communications specifications

6. Connections .......................................................................................................................16

6.1 Connecting TTM-10L in RS-485

6.2 Connecting TTM-10L in RS-232C

7. Table of identifiers (codes) ................................................................................................17

8. Table of ASCII codes.........................................................................................................19

1. Before using the product

1.1 On this operation manual

This is an operation manual regarding communications with a TTM-10L 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 or RS-232C) in purchasing this product.

1.3 What can be done with communications

With this product, users can write and read items specified in "7. 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.)

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.

(Note that any modification related to communications is not permitted.) While this product is in operation without use of the communications function, readout or setting

change of the data or parameters cannot be executed through communications. Switchover of the communications type cannot be key-locked.

1.5 Setting before communications

Before performing communications, this product must be set. See "2. Settings regarding communications."

2. Settings regarding communications

[MODE key]

Mod

e screen

The parameter screen opens by pressing the MODE key for 2 seconds or longer.

Parameter screen

On the parameter screen, the left is displayed.

Press the MODE key several times to open the screen for the 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.

(No change can be made during communications.)

Measured value

Proportional band

Power-on

[MODE key] [MODE key]

Initial screen Displayed for 4 seconds upon the power-on.

In 4 seconds from the power-on, the screen automatically opens.

type “###.” (The number of the presses depends on specifications including options.)

Press the MODE key to open the following screens. Use the p and q keys to make inputs.

Communications type

Communications parameter

Communications speed

Communications address

Response delay time

Upon completion of the settings, press the MODE key for 2 seconds or longer; the screen returns to the measured value screen.

The parameters shown above are initial values. MODE key: Press the MODE key once to change a screen.

2.2 Setting a communications type

Press and set the first digit using the p and q keys. The initial setting is "###."

• When RS-485 is specified

Not used (off) RS-485 (on)

• When RS-232C is specified

Not used (off) RS-232C (on)

* This screen in not key-locked. No switchover between RS-232C and RS-485 is possible. (Must be specified at the time of

purchase.)

2.3 Setting a data length

F

Stop bit 1

I

Stop bit 2

c

No parity

f

Odd parity

D

Even parity

N

Data len

gth, 7 bits

E

Data length, 8 bits

BCC check

c

BCC check disabled

j

BCC check enabled

00 BPS

2400 BPS

4800 BPS

9600 BPS

2.4 Setting a stop bit length

2.5 Setting a parity

2.6 Setting whether to conduct a BCC check

Operate the ▲ and ▼ keys to make the settings. The initial value is HHHH.

p: Stop bit length

¢: Parity

˜¿¢p

¿: Data length

2.7 Setting a communications speed

Operate the ▲ and ▼ keys to make the settings. The initial value is HH.

＊＊＊＊

I K E M

2.8 Setting an address

Operate the ▲ and ▼ keys to make the settings. The initial value is H.

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

2.9 Setting a response delay time

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.

Operate the ▲ and ▼ keys to make the settings. The initial value is ###.

Setting range: 0 to 250msec

* If the response delay time 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 time.

3. 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.

Transmitted by a high-

level computer

High-level computer

This product (TTM-10L)

See "2.9 Setting a response delay time." See "3.6.1 Communications timing."

Request message

Response delay time

0-250ms

Transmitted by

TTM-10L

Response message

3.2 Message types

n Messages are roughly divided into the following types:

Request message (transmitted

from a high-level computer)

"3.3.1"

Read request message

Transmitted by a high-

level computer

Request message

1ms or more

See "3.6.2 Interval between requests."

Response message (transmitted

from this product)

"3.4.1"

Receipt acknowledgement and data

response

Transmitted by

TTM-10L

Response message

"3.4.2"

"3.3.2"

Write request message

"3.3.3"

Store request message

"3.4.3"

"3.4.2"

: Response when a normal "request message" is received : When a received "request message" contains an error

Write complete response

Reception error and error description

response

Store complete response

n All codes (except for BCC) from STX and data to ETX are expressed in ASCII codes. n In assembling a program for a high-level computer, see "7. Table of identifiers (codes)" and "8.

Table of ASCII codes" at the end of this manual.

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

n For codes ① to ⑩, see "3.5 Description of codes." n 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

ＳＴＸ

□

①

②

Start code③Contents of the

Address

□

request: read/write

Ｒ

□

④

｜

Identifier

3.3.2 Composition of a write request message

ＳＴＸ

□

①

②

Start code③Contents of the

Address

□

Ｗ

request: read/write

□

④

｜

Identifier

□

｜

ＥＴＸ

ＢＣＣ

□

｜

⑥

⑦

End code

BCC data

□

⑤

Numerical data

ＢＣＣ

ＥＴＸ

⑥

⑦

End code

BCC data

3.3.3 Composition of a store request message

ＳＴＸ

□

Ｓ

Ｔ

Ｗ

②

①

Start code③Contents of the

request: read/write

Address

④

｜

Identifier

ＥＴＸ

Ｒ

｜

⑥

End code

ＢＣＣ

⑦

BCC data

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

n For codes ① to ⑩, see "3.5 Description of codes." n 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

ＳＴＸ

ＡＣＫ

□

ＢＣＣ

ＥＴＸ

□

①

②

Start code⑧Acknowledge code

Address

④

｜

Identifier

｜

⑤

Numerical data

⑥

⑦

End code

BCC data

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

ＳＴＸ

□

①

②

Start code⑥End code

Acknowledge code

Address

ＡＣＫ

⑧

ＢＣＣ

ＥＴＸ

⑦

BCC data

3.4.3 Response message in the case of an error

ＳＴＸ

ＮＡＫ

□

ＢＣＣ

ＥＴＸ

□

①

②

Start code

acknowledge code

Address

⑨

⑩

End code

Negative

Error type

⑥

⑦

BCC data

3.5 Description of codes

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

ASCII codes.

n For the ASCII codes, see "8. Table of ASCII codes." n For conversion to ASCII codes, see "4. Examples of 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 "7. 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 00010.

Example Significance of the value

Proportional band (P) →1.0% Data (PV), etc, whose decimal point can be shifted When the decimal point setting (DP) is 0 →10 When the decimal point setting (DP) is 0.1 →1.0

Even when "###" is set to "0" on a model with a platinum resistance temperature detector, a

communications data is transmitted with a decimal point.

⑥ ETX 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 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.

Error No.

0 Instrument error (memory error or A/D conversion error) 1 The numerical data deviated from the "range of settings designated 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 specified 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.

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

3.6 Communications precautions

3.6.1 Communications timing

Set a sufficient response delay time to make sure that this product is switched over from transmission to reception with regard to a high-level computer in using RS-232C and RS-485.

See the figure in "3.1 Communications procedure" and "2.9 Setting a response delay time."

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."

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 500ms.

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 500ms 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.

3.6.8 Storing data other than a store request message

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

1) If a parameter is changed by key operation in the communications mode

2) If auto-tuning is started and stopped normally in the communications mode

3) If the communications mode is switched to the local mode

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

If a change of the setting (SV or SV2) used in control is attempted through communications during the auto-tuning, "NAK" and "2" are responded.

4. Examples of communications

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)

ＳＴＸ

２

Ｐ

７

Ｖ

Ｒ

ＢＣＣ

ＥＴＸ

１

①

Response message (returned from this product)

ＳＴＸ

２

７

①

②

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 Acknowledge code ACK 06H

Note 1): See "7. Table of identifiers (codes)." Note 2): For the ASCII codes, see "8. Table of ASCII codes."

③

②

ＡＣＫ

Ｐ

１

Ｖ

⑧

④

⑥

④

０

⑦

ＢＣＣ

０

７

⑤

ＥＴＸ

７

⑥

⑦

4.2 Examples of communications to be written

Example: Request message: This requests this product set at address 03 to set "the A1F setting to (High-level computer) 135" (write 135).

(Set the event 1 function to the following: Error alarm type to be PV

error alarm 1, alarm type to be deviation lower limit alarm 3 and additional function to be alarm hold + standby sequence (5).)

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)

ＳＴＸ

Ａ

０

３

Ｗ

①

②

③

Ｆ

１

０

１

④

⑤

ＢＣＣ

ＥＴＸ

１

⑥

⑦

Response message (returned from this product)

ＳＴＸ

０

①

Code Code, data ASCII code, note 2)

① Start code STX 02H ② Address 03 32H 33H ③ Request contents W (Write) 57H ④ Identifier, note 1) A2F 41H 33H 46H ⑤ Numerical data 00135 30H 30H 31H 33H 35H ⑥ End code ETX 03H ⑦ BCC data request 56H

response 04H ⑧ Acknowledge code ACK 06H

Note 1): See "7. Table of identifiers (codes)." Note 2): For the ASCII codes, see "8. Table of ASCII codes."

ＡＣＫ

ＢＣＣ

ＥＴＸ

３

②

⑥⑦⑧

5. Specifications

5.1 Communications standard category

Compliant with RS-485 and RS-232C

5.2 Communications specifications

Communications

type

Communications system

Interface system

Character

Information system Half duplex Synchronization system Asynchronous Transmission code ASCII code Signal line 2-line type 3-line type (2 for transmission and

Communications speed 1,200, 2,400, 4,800 and 9,600 bps Start bit length Fixed at 1 bit Stop bit length Either 1 or 2 bit can be selected. Data length Either 7 or 8 bit can be selected. Parity No, odd or even number can be selected. BCC check Yes or no can be selected. Communications address 1 to 99

RS-485 RS-232C

Compliant with RS-485 Compliant with RS-232C Network Up to 1 pair, 31 stations 1 pair, 1 station

reception, and SG)

6. Connections

6.1 Connecting TTM-10L in RS-485

High-level computers (parent stations) TTM-10L (child stations)

TTM-10L (child stations)

Install an end of line resistor at both of the farthest devices in the parent station and the mobile unit. For a resistance value, use one that matches the characteristic impedance of the cable. Provided that the synthesis is set to at least 75Ω.

6.2 Connecting TTM-10L in RS-232C

High-level computers (parent stations) TTM-10L (child stations)

For actual use, the following connection is required inside the connector in the parent stations: CS (transmission permission) and ER (data terminal ready), and RS (transmission request) and DR (data set ready) and CD (reception carrier detection).

7. Table of identifiers (codes)

¢ For the setting range, selection items, initial values, etc., see "Operation Manual- Standard

Version" separately attached. a) Character number or symbol in the operation flow described in "Operation

Manual - Standard Version" (separate volume)

é b) 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).

c) Character: The character to be displayed on the screen of this product. d) Name: Item name e) R/W: This specifies which is possible: reading, writing, or both. f) Description:

10 11 12

Identifier

B C D E

1 2 3 4 5 6

7 8 9

PV1

□SV

1L1 1H1

□AT

□P1

□I1 □D1 □T1 □C1

□IO

SLL SLH CNT PVS PBB

□CP

Character

Setting value (PV) R

Control setting value (SV) R/W Target value of control *1 EV lower limit setting R/W R/W the EV lower setting *3, *4 EV upper limit setting R/W R/W the EV upper setting *3, *5 AT start/release R/W

Proportional band R/W R/W the proportional band *1 Integral time R/W R/W the integral time *1, *2 Derivative time R/W R/W the derivative time *1, *2 Proportional cycle R/W R/W the proportional cycle *1, *2 Control sensitivity R/W R/W the control sensitivity *1, *6 Input/output type R/W R/W the input/output type *10

20: Current (4-20 mA)

SV limiter lower limit R/W R/W the SV limiter lower limit SV limiter upper limit R/W R/W the SV limiter upper limit Control type R/W R/W the control type *1 PV compensation R/W R/W the PV compensation Manual reset R/W R/W the manual reset *1, *2 Off point position R/W R/W the off point position *1, *6

Name R/W Description

Use it as monitor for measurements (PV). When overscale: HHHHH When underscale: LLLLL

R/W the auto-tuning status *1, *2 At start: 00001 At release: 00000 When "00001" is received, the auto-tuning starts; when the auto-tuning stops, the indication becomes "00000."

0 0 0 0 0

Output type Input type

Input type

00: K thermocouple 01: J thermocouple 02: E thermocouple 03: T thermocouple 04: R thermocouple 05: S thermocouple 06: N thermocouple 07: W5Re/W26Re 10: Pt100 11: JPt100

Output type

0: None 1: Relay contact output 2: SSR drive output

Identifier

14 15

*1 On a model without control, "NAK" and "2" are responded. *2 When the control output is of an ON/OFF control, "NAK" and "2" are responded. *3 On a model without EV, "NAK" and "2" are responded. *4 When the alarm type for EV is not "lower limit alarm or upper/lower limit alarm," "NAK" and "2" are responded. *5 When the alarm type for EV is not "upper limit alarm or upper/lower limit alarm," "NAK" and "2" are responded. *6 When the control output is of a PID control, "NAK" and "2" are responded. *7 A model without EV responds "NAK" and "2." *8 A model of a thermocouple input responds "NAK" and "2." *9 A model of current and voltage inputs responds "NAK" and "2." *10 Only R for output type: The input type cannot be changed for over "----."

A1F

ALC

□DP

□CF

LOC

□CJ

PV2

OM1

STR

Character

EV function R/W R/W the EV function *7

EV sensitivity R/W R/W the EV sensitivity *7 Decimal point position R/W

Switchover between °C and °F R/W

Lock setting R/W

Cold junction compensation temperature

With a decimal point for a measured value (PV)

Output status monitor R

Data store W

Name R/W Description

0 0 0 0 0

Additional function PV event output PV error event output

Additional function

0: None 1: Event output hold 2: Standby sequence 3: Event output + standby sequence

PV event output

0: None 1: Deviation upper/lower limit event output 2: Deviation upper limit event output 3: Deviation lower limit event output 4: Deviation upper/lower limit range event

output

5. Absolute value upper/lower limit event output

6: Absolute value upper limit event output 7: Absolute value lower limit event output 8: Absolute value upper/lower limit range

event output

PV error event output

0: None 1: PV error event output

R/W the decimal point position *8

0: 00000

0.0: 00001

0.00: 00002

R/W the switchover between °C and °F *9

°C: 00000 °F: 00001

R/W the lock setting

OFF: 00000 All lock: 00001 Parameter lock: 00002

Used as a monitor for the cold junction

compensation temperature. Indication range: -20 to 80 °C

When overscale: HHHHH When underscale: LLLLL

Used as a monitor for "with a decimal point for a

measured value (PV)" Indication range: -199.9 to 999.9

When overscale: HHHHH When underscale: LLLLL

0 0 0 0 0

Output status EV status

1: ON 0: OFF

Stores a changed data.

8. Table of ASCII codes

ASCII code 02H 03H 06H 15H

Use symbols STX ETX ACK NAK

ASCII code 30H 31H 32H 33H 34H 35H 36H 37H 38H 39H

Use numerical

characters

2DH 20H

ASCII code 41H 42H 43H 44H 45H 46H 47H 48H 49H 4AH

Use characters A B C D E F G H I J

4BH 4CH 4DH 4EH 4FH 50H 51H 52H 53H 55H K L M N O P Q R S T

0 1 2 3 4 5 6 7 8 9

−

Minus

Space

55H 56H 57H 58H 59H 5AH 20H U V W X Y Z

Space

TOHO ELECTRONICS INC.

Head office: 1-13-21, Tanashioda, Sagamihara Kanagawa 229-1125 Japan.

Phone: +81-42-777-3311 Fax: +81-42-777-3751

47‑9929

TOHO ELECTRONICS TTM-10L User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual