Yokogawa JUXTA M Series Digital Limit Alarms MVTK Uživatelský manuál stáhnout pdf (Strana 29)

3-15

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

WRR Reads D registers and I relays on a word-by-word basis in random

order

● Function

Reads the statuses of the individul registers on a word-by-word basis specified in random

order by the specified number of words.

• The number of words to be read at a time is 1 to 32.

• 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 1 2 2 1 3 2 5 1 5 1

Command

element

STX Address

number

(ADR)

CPU

number

0 WRR Number

of words

(n)

number 1

Comma

or space

number 2

Comma

or space

Command (continued)

1 2 224 4 4 2 11Number of Bytes

• • •

Response

element

STX Address

number

(ADR)

CPU

number

OK dddd1 dddd2 ETX CR• • • 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 32

5211

• • •

number n

ETX CR• • • Checksum

● Example:

Reading the alarm-1 setpoint (D0101) and alarm-2 setpoint (D0102) of the M Series with

address number 01.

[Command]

[STX]01010WRR02D0101,D010288[ETX][CR]

The alarm-1 setpoint 500 (01F4 [HEX]) and alarm-2 setpoint 500 (01F4 [HEX]) are re-

turned with respect to the above command (50.0 is expressed as 500).

[Response]

[STX]0101OK01F401F4FC[ETX][CR]

500 in decimal

(Alarm-1 setpoint is 50.0.)

500 in decimal

(Alarm-2 setpoint is 50.0.)

1 2 ... 24 25 26 27 28 29 30 31 32 33 34 ... 69 70

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