Vaisala HMM105 Manuel d'utilisateur télécharger pdf (Page 18)

Technical Reference _________________________________________________________________

16 ________________________________________________________________ M211638EN-A

Get_Parameter_Info

The Get_Parameter_Info command (ID 83h) reads the properties of a

single parameter from the HMM105. The command is useful for adapting

to parameters that have been added in a new software version. If the

requested parameter ID is not valid, data type Unknown Parameter ID

is returned.

Table 22 Get_Parameter_Info Invoke Message

Message Segment

Length

Content

C address

1 byte

C address (write)

Command ID

1 byte

Always 83h

Device address

1 byte

See Table 5 on page 4

Frame length

1 byte

Always 06h.

Data

1 byte

Parameter ID

Checksum

2 bytes

See section Checksum on page 9

Table 23 Get_Parameter_Info Response Message

Message Segment

Length

Content

C address

1 byte

C address (read)

Status

1 byte

See section Status Byte on page 9.

Command ID

1 byte

Always 83h

Device address

1 byte

See Table 5 on page 4

Frame length

1 byte

Always 12h.

Data

1 byte

Parameter ID

1 byte

Parameter datatype. See Table 24

below.

1 byte

Parameter length in bytes.

1 byte

Parameter persistence. Describes if the

parameter value is volatile (lost at reset)

or non-volatile (survives reset). See

Table 25 below.

8 bytes

Parameter name. If the name is shorter

than 8 bytes, extra bytes are filled with

00h.

Checksum

2 bytes

See section Checksum on page 9

Table 24 Parameter Data Types

Code

Meaning

Unknown parameter ID

Byte

Integer (16-bit)

Unsigned Integer (16–bit)

Float (32-bit)

String

Table 25 Parameter Persistence

Code

Meaning

Void

Volatile

Non volatile

1 2 ... 13 14 15 16 17 18 19 20 21 22 23

Commentaires sur ces manuels

Pas de commentaire

Vaisala HMM105 Manuel d'utilisateur Page 18

Commentaires sur ces manuels

Produits connexes et manuels pour Humidificateurs Vaisala HMM105