Bsca Disk Errors - IBM 3742 Reference Manual

Line Check (C)
A line check occurs when seven receive timeouts or 151ine
bid timeouts on a switch network have occurred during the
transmitting or receiving of data. If the 3741 is on
switched lines, it disconnects from the line. If the terminal
is on nonswitched lines, it goes into a control mode, moni-
toring the line for line bids.
Remote Abort (R)
A remote abort occurs when an EOT or a disconnect
sequence is received as a response to a data transmission
block, or following a response sent after receiving a data
transmission block that did not end with ETX.
On nonswitched or switched lines, an EOT causes the
3741 to go into control mode, monitoring for line bids. On
switched lines, a disconnect sequence or a disconnect
timeout causes the 3741 to disconnect from the telephone
line.
Message Aborted (Q)
A message aborted condition occurs after four consecutive
negative responses have been received as responses to the
same data transmission block. The 3741 sends an EOT
following the fourth negative response.
Received Line Bid (V)
Whenever the 3741 is in the control mode and has received
a line bid when in a RJ, BJ, OJ, TI, BI, DI, or PI mode, the
terminal responds with a negative response and indicates a
received line bid indication.
Wrong-Length Check (W)
Whenever the 3741 has received the first data block of a
data set with zero characters or with more than 128
characters, or has received succeeding data blocks of differ-
ent length within the same data set, the terminal indicates
a wrong-length check and transmits an EOT as a response
to the data block.
Negative Bid Response (X)
Whenever the 3741 receives a negative response or discon-
nect sequence as a response to a transmitted line bid, the
terminal indicates a negative bid response.
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BSCA Disk Errors
If any of the following disk errors occur when the 3741 is
transmitting or receiving data, it will abort by transmitting
an EOT:
• Read
• Write
• Length
• Seek
• No record found
BSCA Setup Error (H)
This error condition results when the communications
mode is selected and one of the following conditions exist:
• The terminal ID feature is installed and the cursor is
positioned past column 16 of the current record buffer.
• The keylock is locked.
BSCA Disk(s) Full (D)
This error results from one of the following conditions:
• Whenever all available record positions have been
recorded into.
• Whenever no val id data set labels exist to receive into.
• Whenever the last data set of the transmission is trans-
mitted and a continued data set is indicated.
Data Set Not Ready
(I)
Whenever the 3741 detects that the data set ready status
has been lost, the terminal indicates a data set not ready
error.
Operator Initiated Termination (S)
Whenever the reset key is used to terminate a BSCA opera-
tion, an S is displayed temporarily while the 3741 is trans-
mitting a status message.