Yokogawa JUXTA M Series Digital Limit Alarms MVTK Bedienungsanleitung PDF herunterladen (Seite 32)

3-18

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

WRM Monitors D registers and I relays on a word-by-word basis

● Function

Reads the register data that have been specified in advance by the WRS command.

• Before executing this command, the WRS command must always be executed to

specify which registers are to be monitored. If no register has been specified, error

code 06 is generated.

• 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 1 1

Number of Bytes

• • •

12 2244 4 2 11

Command

element

STX Address

number

(ADR)

CPU

number

Checksum0 WRM ETX CR

Response

element

STX OK dddd1 dddd2 ETX CRAddress

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 number of words specified by the WRS command

ddddn is a character string in hexadecimal.

n=1 to 32

● Example:

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

address number 01.

(This command reads the registers specified by the WRS command.)

[Command]

[STX]01010WRME8[ETX][CR]

CPU number: 01

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]0101OK01F401F412[ETX][CR]

1 2 ... 27 28 29 30 31 32 33 34 35 36 37 ... 69 70

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