Yokogawa JUXTA M Series Digital Limit Alarms MVTK Manuel d'utilisateur télécharger pdf (Page 27)

3-13

IM 77J04J11-01E 1st Edition : 2006.08.25-00

WRD Reads D registers and I relays on a word-by-word basis

● Function

Reads a sequence of contiguous register data on a word-by-word basis by the specified

number of words, starting at a specified register number.

• The number of words to be read at a time is 1 to 64.

• For the format of response in the event of failure, see subsection 3.1.2.

• The command shown below includes the checksum function.

When performing communication without checksum, do not include the 2-byte

checksum element in the command.

● Command/Response (for normal operation)

Number of Bytes • • •12 2244 4 2 11

Response

element

STX OK dddd1 dddd2 ETXAddress

number

(ADR)

CPU

number

• • • ddddn Checksum

The response is returned in a 4-digit character string (0000 to FFFF) in hexadecimal.

ddddn: read data of the specified number of words

ddddn is a character string in hexadecimal.

n=1 to 64

Number of Bytes 1 2 2 1 3 5 1 2211

Command

element

STX Address

number

(ADR)

CPU

number

Comma

or space

Number

of words

(n)

Checksum0 WRD ETX CR

● Example:

Reading the alarm-1 setpoint (D0101) of the M Series with address number 01.

[Command]

[STX]01010WRDD0101,0172[ETX][CR]

The alarm-1 setpoint 500 (01F4 [HEX]) is returned in response to the above command

(50.0 is expressed as 500).

[Response]

[STX]0101OK01F437[ETX][CR]

500 in decimal (Alarm-1 setpoint [A1] is 50.0.)

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 ... 69 70

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Yokogawa JUXTA M Series Digital Limit Alarms MVTK Manuel d'utilisateur Page 27

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