EDI ORACLE 2E, Руководство по эксплуатации, Страница: 24 / 30

ORACLE SERIES 2E, 2EC, 4E, 4EC, 4H
Operations Manual
Eberle Design Inc. Page 19
4.3.3.1 FRAMING
When a framing error is received an “ F ” is displayed along with the port it was received on.
“ F F ” indicates that a framing error was received on the front panel serial port. “ F B ”
indicates that a framing error was received on the backplane serial port.
4.3.3.2 OVERRUN
When an overrun error is received an “ O _ ” is displayed along with the port it was received
on. “ O F ” indicates that an overrun error was received on the front panel serial port. “ O
B ” indicates that an overrun error was received on the backplane serial port.
4.3.3.3 NOISE
When noise is received an “ N _ ” is displayed along with the port it was received on. “ N F ”
indicates that noise was received on the front panel serial port. “ N B ” indicates that noise
was received on the backplane serial port.
4.3.4 PROTOCOL ERRORS
Protocol errors are displayed as two reversed characters. Note: The port is not displayed
for protocol errors.
4.3.4.1 CB - CONTROL BYTE ERROR
If the control byte of a received frame is invalid than a “ C B _ ” is displayed.
4.3.4.2 CE - CHECKSUM ERROR
When the checksum of a received frame is invalid a “ C S _ ” is displayed.
4.3.4.3 CR - CRC ERROR
When the CRC of a received frame is invalid a “ C R _ ” is displayed.
4.3.4.4 FE - FRAME ERROR
If a received frame is too long or too short, or a buffer overflow error occurs than with an
“
F E _
” is displayed.
4.3.4.5 ME - MISSING END
When a received frame is missing the end of frame character an “ M E _ ” is displayed.
4.3.4.6 MS - MISSING START
When the start of frame character is missing from a received frame an “ M S _ ” is displayed.
4.3.4.7 PP - INVALID PROTOCOL
The front panel serial port can receive either an HDLC frame or a PPT frame (Point to Point
Transfer). The backplane serial port however can only receive an HDLC frame. If a PPT
frame is received on the backplane serial port a “ P P _ ” is displayed.
4.3.4.8 TO - TIMEOUT
After receiving the start of a frame, a timer is used to stop the looking for an end of the
frame. If the time between received characters of a frame is greater than 1 second a
“ T O _ ” is displayed.