Error Codes; Display Station Error Codes - IBM 5251 Series Maintenance Information Manual

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ERROR CODES
Two types of error codes are described in this section:
display station error codes and operator error codes.
Display Station Error Codes
Errors that are relative to hardware failures or the
servicing of a display station are listed first. The
controller detects these errors by sensing the status sent
from the display station or by sensing either no
response or a wrong response. Errors are stored in the
order in which they are received; they are listed here in
groups. The error codes appear on the display screen in
the bottom left corner; error code 01 xx identifies a
display station error. (These numbers blink.)
Line/Interface Errors
0100 No Response
This error is reported if the display station did not
respond to a poll when the display station and
controller were in session. This error is not
normally logged.
0101 Transmit Activity Check
This error is detected by the controller when a poll
or command is executed by the controller.
0103 Receive Parity Error
The controller reports this error if the wrong parity
was received in response to a poll or command.
0104 Line Parity Check
The display station reports this error if the wrong
parity was received in a poll or command.
0106 Receive Length Check
The controller received the wrong number of bytes
as a result of a poll or command.
0107 Wrong Station Responded
An incorrect station address was returned in
response to a poll from the controller.
208-209
1-130
0108 Power On- Transistion
The status bit was set when the display station
was powered on. This error is reported only if the
display station was in session.
0109 Activate Command Failure
The controller checked the device status and found
that the busy bit was not on after an activate
command had been sent.
Keyboard Errors
0111 Scan Code Not Valid
The 8-bit code sent in the keyboard response
frame could not be translated to an assigned
character or function that was specified by the
controller.
Command / Function Errors
0120 Command Not Valid
This condition indicates that the poll/command
sent to the display station was not a valid
command or that the device
10
was not correct.
0121 Register Value Not Valid
This condition indicates that the address counter
value was not within the user accessible limits.
0122 Storage or Input Queue Overrun
This condition occurs if more than 16 commands
and associated data frames are sent to the display
station by the controller, or if an attempt is made
to store data in storage that is not accessible to
the user.
0123 Null or Attribute Exception
This condition indicates that no attribute was
found or that the address counter pointed to an
attribute.