A
Logon (A)
The first message of the session must be a Logon (35=A) message sent by the client. If the credentials are accepted, the server will respond with a Logon (35=A). If the credentials are invalid, the connection will be closed.
Fields
TagNameReqDescription
- TagName
Header
ReqYDescriptionStandard header, with 35=A.
- Tag98Name
EncryptMethod
ReqYDescriptionBecause it is always unencrypted, the tag is always set to 0.
- Tag108Name
HeartBtInt
ReqYDescriptionThe interval in seconds between heartbeats. The tag is always set to 30.
- Tag141Name
ResetSeqNumFlag
ReqNDescriptionSupported values: N = No Y = Yes (reset sequence numbers)
- Tag553Name
Username
ReqY*DescriptionThe user name.
- Tag554Name
Password
ReqY*DescriptionThe password.
- TagName
Trailer
ReqYDescription
YRequired — include this field in every message.
NOptional — may be omitted.
N*Conditionally required — optional unless noted in Description (look for (*)).
