6100 MPS-B Programming Manual

WRITING APPLICATIONS THAT USE 6100 MPS-B

WRITE Request

The WRITE request permits your application to select a station or

group of stations, and transmit a message to the station or group

of stations.

The request buffer format is:

Function := 66

Modifier := 0 if select station using station index

1 if select station using station index, and

enable station

2 if free format select sequence

3 if ENVOY format select sequence

Request ID := A unique value from 1 to 32767,

application-dependent

Text Out := Length of text, in bytes (maximum value is 2048)

Text In := 0

Text := Appropriately formatted data (see "Data Formats"

in Section 1)

The response buffer format is:

Function := 66

Status := 0 if the operation completed successfully, or

a code greater than zero if an error occurred

Request ID := The same as in the request

Text Out := 0

Text In := 0, or

2 if status detail code is present in Text field

Text := Null, or

Byte 0 = status detail code; Byte 1 = 0

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