Enmet EX-6100 Series Manual de usuario descargar pdf (Pagina 25)

EX-6100

ENMET Corporation

A.4.2 Reading a Variable

Send a read frame with the Variable ID to be read:

DLE RD var-id DLE EOF Csum hi Csum lo

Byte stuffing

Device response on success, where requested variable data < 255 bytes:

DLE DAT data-len data DLE EOF Csum hi Csum lo

Byte stuffing

Device response on failure:

DLE NAK reason

Where ‘reason’ is a single byte failure code, the meaning of which depends on the device type, i.e.

Reason = 1, NotReadable,

Reason = 2, ReadOutOfRange

A.4.3 Read example - read live data

The following example is based on V4.x.xE where the data is either byte or integer types only.

Send the following bytes:

DLE, RD, Variable ID, DLE, EOF, Checksum High byte, Checksum low byte i.e.

0x10, 0x13, 0x01, 0x10, 0x1F, 0x00, 0x53

Device response on success:

DLE, DAT, Data length, Data, DLE, EOF, Checksum High byte, Checksum low byte, i.e.

0x10 DLE

0x1A DAT

0x0D Data length

0x03 Version

0x01 Display mode

0x07 Sensor Type

0x00, 0x00 Gas reading (signed integer x 100) = 0

0xAE, 0x0B Current sensor temperature (signed integer x 100) = 29.9

0x92, 0x08 Active sensor signal (unsigned integer) = 2194

0xD7, 0x04 Reference sensor signal (unsigned integer) = 1239

0x10 DLE

0x1F EOF

0x02 Checksum high byte

0x9F Checksum low byte

A.4.4 Writing a Variable

Send a write frame with the Variable ID to be written:

DLE WR WP1 WP2 var-id DLE EOF Csum hi Csum lo

Byte stuffing

Device response on success:

DLE ACK

Where data to write is < 255 bytes, send a DAT frame:

DLE DAT data-len data DLE EOF Csum hi Csum lo

Byte stuffing

Device response on write success:

DLE ACK

Device response on write failure:

DLE NAK reason

Where ‘reason’ is a single byte failure code, the meaning of which depends on the device type, i.e.

Reason = 1, NotWritable

Reason = 2, WriteOutOfRange

Reason = 3, BadDataLength

Reason = 4, IncorrectVersion

1 2 ... 20 21 22 23 24 25 26 27 28

Comentarios a estos manuales

Sin comentarios

Enmet EX-6100 Series Manual de usuario Pagina 25

Comentarios a estos manuales

Relacionado con productos y manuales para Instrumentos de medición Enmet EX-6100 Series