Visara LINCS Central Control - Manual (Page 169)

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Chapter 14. Online Testing
707024-002
CHC Messages
These messages are from the CHC to the CHP and Trace event messages from the CHC:
Channel Command Received
This message from the CHC indicates that a new channel command has been received on the
channel. Included in the message are the Channel Address the command was addressed to,
Channel Command, Initial Status presented by the CHC, and additional flags which identify
any special conditions.
The format of the description and extended data is:
• Ch. Cmd. Received (C) Addr = xx Cmd = xx Status = xx
The C parameter indicates if Command Chaining was indicated when Initial Status was
presented on the channel.
Status Accepted
This message from the CHC indicates that status has been presented and accepted on the
channel by the CHC in response to a Channel Command or by the CHC in response to a
Present Ending Status or Present Asynchronous Status CC Command from the CHP.
The format of the description and extended data is:
• Status Accepted (S,C,U) Addr = xx Flags = xx Status = xx
The S, C, U parameters indicate if the CHC message was Solicited (S) or Unsolicited (U), or
that Command Chaining (C) was indicated when Status was presented on the channel. Solicited
indicates that the status was generated by the CHP via a Present Ending Status or Present
Asynchronous Status CC Command, while unsolicited indicates that the status was generated
by the CHC during channel command processing.
Command Complete
This message from the CHC is received in response to all CC Commands issued by the CHP
except Present Ending Status and Present Asynchronous Status. This message indicates that
the CC Command issued to the CHC has been successfully processed by the CHC.
The format of the description and extended data is:
• Command Complete
Command Not Accepted
This message from the CHC is received in response to the Present Asynchronous Status or Go
Offline CC Commands issued by the CHP to indicate that the CC Command could not be
processed at this time by the CHC. This message can also be received from the CHC in
response to any CC Command to indicate a synchronization problem between the CHC and
CHP. Synchronization type errors will normally be logged as a Machine Check upon receipt
of this message.
The format of the description and extended data is:
• Command Not Accepted Flags = xx
Chaining Terminated
This message from the CHC indicates that the channel has terminated command chaining
after status had been presented which indicated command chaining but before the next channel
command had been received (Suppress Out channel tag line goes inactive).
The format of the description and extended data is:
• Chaining Terminated