:Address (Machine No.)

•• • • • • • • • • • • • • • • • • • • • • • • • • • • • Two digits

Two-digit address data (00~99) set in the controller is divided to the higher position (tens) and the lower position (units) and each is shown by an ASCII code.

:Text •••••••••••••••••••••••••••••••••••A group of a command and data,

in the format of each command.

: End character.• • • • • • • • • (3AH) Shows the end of the block.

:BCC check • • • • • • • • • • • • BCC check data is shown in two digits.

A value obtained by exclusive OR operation of data following @(data in the higher position of the address) through : is converted to two ASCII characters and shown by two digits in the higher and lower positions.

(Example) BCC operation of DI read command (Address: 01)

@

0

1

D

1

:

BCC

 

CR

 

 

 

 

 

 

 

 

 

(40H)

(30H)

(31H)

(44H)

(31H)

(3AH)

(34H)(45H)

 

(0DH)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

E

 

30H +

31H

+ 44H + 31H + 3AH=4EH

••• BCC=(34H), (45H)

 

In the above,

+ =EX-OR (exclusive OR)

 

 

 

:

Terminator • • • • • • • • • • • • CR(0DH) Shows the termination

 

of the data of the block.

 

 

 

 

(2)In this protocol, address data is inserted in the block in each transmission or response and so no data link needs to be established or aborted.

(3)The apparatus which has the address matches the one in the command block, interprets the command, data, etc., and returns a response block by inserting the same address into it. Apparatuses which the addresses do not match the one in the block wait for the next block without activating.

(4)In the case of receiving block data and the terminator CR is not completed in about 1 second after receiving the start character, it designates a time-out and automatically waits for the next command, that is, the start character @ is being waited for.

7-5. Text

7-5-1. Text format

The text format is classified into read data, write data and response data.

(1) Read Data

Command

 

The text format of read data contains only of a

 

 

command of two characters.

 

 

 

 

 

Command

 

Contents of Read Data

 

 

 

 

PV value, Execution SV value*1, Control output value,

D1

Stop (STBY) status, Manual (MAN) status, AH status,

 

AL/HB status, AT status, SB status.

 

 

 

D2

Set value of higher limit alarm (AH), Set value of lower

limit alarm (AL).

 

D3

Load current value, Set value of heater break alarm (HB).

D4

Set value of set value bias (SB).

D5

Proportional band (P) value, Integral time (I), Derivative

time (D) value, Set value of target value function (SF).

 

D6

Set value of hysteresis (DF).

D7

Set value of manual reset (MR).

D8

Set value of PV bias, Set value of PV filter.

D9

Set value of proportional cycle time.

DA

Set value of lower limit output limiter, Set value of

higher limit output limiter.

 

DB

Set value of soft start time.

DC

Communication mode, Delay time.

*1 The execution SV value is a total of the SV value and the value bias.

(2) Write Data

Command

 

Write data

The text format of write data

 

 

contains a command and write data

 

 

 

 

 

 

 

 

 

 

value.

 

 

 

 

 

 

 

 

 

 

 

 

Command

Contents of

Attribute

Command

Contents of

 

Attribute

Write Data

Write Data

 

 

 

 

 

 

 

E1

SV value

*2

Numerical

F1

PV bias value

 

Numerical

 

 

 

 

value

 

 

 

 

value

E2

Control output value

Numerical

F2

PV filter value

 

Numerical

 

 

 

 

value

 

 

 

 

value

E3

Stop status

1 byte

 

F3

Proportional cycle

 

Numerical

 

 

 

 

 

 

 

time

 

value

E4

Manual status

1 byte

 

F4

Lower limit output

 

Numerical

 

 

 

 

 

 

 

limiter value

 

value

E5

AT status

 

1 byte

 

F5

Higher limit output

 

Numerical

 

 

 

 

 

 

 

limiter value

 

value

E6

Higher limit alarm

Numerical

F6

Soft start time value

 

Numerical

 

(AH) value

value

 

 

 

 

value

E7

Lower limit alarm

Numerical

F7

Communication

 

1 byte

 

(AL) value

value

 

 

mode

 

 

E8

Heater break alarm

Numerical

 

 

 

 

 

(HB) value

value

 

 

 

 

 

 

 

 

 

 

 

 

 

 

E9

Set value bias (SB)

Numerical

 

 

 

 

 

value

 

value

 

 

 

 

 

 

 

 

 

 

 

 

 

 

EA

Proportional band

Numerical

 

 

 

 

 

(P) value

 

value

 

 

 

 

 

 

 

 

 

 

 

 

 

 

EB

Integral time (I) value

Numerical

 

 

 

 

 

 

 

 

value

 

 

 

 

 

EC

Derivative time (D)

Numerical

 

 

 

 

 

value

 

value

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ED

Target value function

Numerical

 

 

 

 

 

(SF) value

value

 

 

 

 

 

EE

Hysteresis (DF) value

Numerical

 

 

 

 

 

 

 

 

value

 

 

 

 

 

 

 

 

 

 

 

 

 

 

EF

Manual reset (MR)

Numerical

 

 

 

 

 

value

 

value

 

 

 

 

 

*2 SV value is target set value.

(3)Response Data

Response data has different formats depending on whether read data has been received or write data has been received.

Response data to read data received

 

 

 

 

 

 

 

 

 

 

Command

 

Data 1

,

Data 2

,

,

Data n

 

 

 

 

 

 

 

 

 

Appropriate read data contents of commands shown in the table of the read data text format are sent back. Response data to write data received

Command Write data

The same data as the received write data is sent back.

7-5-2. Data format

The data format is divided to 3 categories; numerical data, 1 byte data and special data.

(1)Numerical Data (-2999~9999)

The length of numerical data in the text is fixed to six characters including a code and a decimal point. A code (+ or -) is attached to the head of the numerical data. In the case where the numerical value including a code is less than six characters, 0 is inserted between the code and the figure or figures to make the value six characters. When a code is excluded, each of the 5 characters is a figure or a decimal point.

+

 

 

Numerical value

 

 

 

 

-

 

 

 

 

 

 

 

 

 

 

Numerical data (30H~39H) or a decimal point (2EH)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Code + (2BH) or – (2DH)

 

 

 

 

 

 

 

 

 

 

 

 

Examples of numerical data

 

1

2

3

4

5

6

 

1

2

3

4

5

6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

+

0

0

0

0

1

-1

–

0

0

0

0

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.01

+

0

0

.

0

1

-0.01

–

0

0

.

0

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1234

+

0

1

2

3

4

-123.4

–

1

2

3

.

4

 

 

 

 

 

 

 

 

 

 

 

 

 

12.34

+

1

2

.

3

4

-12.34

–

1

2

.

3

4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0 or OFF

+

0

0

0

0

0

-0.001

–

0

.

0

0

1

- 12 -

Page 13 Page 15
Page 14
Image 14
Omega CN158, CN154, CN155, CN159 manual Text Text format, Data format
Page 13 Page 15

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