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8. TROUBLESHOOTING
/MELSE
(1) The AD51 continues operating in the event of "battery
error", "ORST error", "receive buffer full error", "send
buffer full error", or "PC CPU error".
(2) The receive buffer capacity is 511 bytes per channel.
Overflow data is ignored.
(3) When data is sent from one task t o the buffer memory
and the buffer memory becomes full, the AD51 switches
tasks. After that task has run theAD51 checks the buffer,
if
it
is
now vacant the original task is allowed t o continue
and i f it is still full the AD51 will switch t o a third task
(where used). This checking and switching procedure
will continue for 1 minute if the buffer remains full after
which 1 byte of the excess data will be deleted. The one
minute cycle is repeated until there is no excess data left
(The I minute cycle time may be charged using the SWBi
system subroutine.)
' - (
(4) Possible causes of send buffer full error are as follows:
0
The DTR signal from the external equipment (Pin 6
of the RS-232C connector) i s low.
o
X ON code
is not received from the external equip-
ment after X OFF has been received.
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