Measurement Computing Personal488 rev.3.0 For DOS & Windows 3.Xi - Manual (Page 366)

III. COMMAND REFERENCES - 15. Command References 15B. Driver488/SUB, W31, W95, & WNT
Personal488 User’s Manual, Rev. 3.0 III-351
This is a new function in Driver488/W95. The TermQuery function queries the terminators setting.
Terminators are defined by the TermT structure.
TimeOut
SYNTAX int pascal TimeOut(DevHandleT devHandle, long millisec);
devHandle refers to either an IEEE 488 interface or an external device.
millisec is a numeric value given in milliseconds.
RETURNS -1 if error
MODE Any
BUS STATES None
SEE ALSO Reset
EXAMPLE errorcode = TimeOut(ieee,100); Set the timeout value to 100 msec.
The TimeOut command sets the number of milliseconds that Driver488 waits for a transfer before
declaring a time out error. Driver488 checks for timeout errors on every byte it transfers, except in the
case of asynchronous transfers. While the first byte of an asynchronous transfer is checked for time
out, subsequent bytes are not. The user’s program must check for timely completion of an
asynchronous transfer.
Time out checking may be suppressed by specifying a time out value of zero seconds, which specifies
an infinite timeout. The default time out is specified in the startup configuration, normally
10 seconds.
The time out interval may be specified to the nearest 0.001 seconds (1 millisecond). However, due to
the limitations of the computer, the actual interval is always a multiple of 55 milliseconds and there is
an uncertainty of 55 msec in the actual interval. Time out intervals from 1 to 110 milliseconds are
rounded to 110 milliseconds. Larger intervals are rounded to the nearest multiple of 55 msec (e.g.
165 , 220 , 275 msec, etc.).
TimeOutQuery
Driver488/W95 only
SYNTAX INT pascal TimeOutQuery(DevHandleT devHandle, DWORD
millisec);
devHandle refers to either an IEEE 488 interface or an external device.
millisec is a numeric value given in milliseconds.
RETURNS -1 if error
MODE Any
BUS STATES None
SEE ALSO TimeOut, Reset
EXAMPLE None provided.
This is a new function in Driver488/W95. The TimeOutQuery function queries the time out setting,
given in milliseconds.
Trigger
SYNTAX int pascal Trigger(DevHandleT devHandle);
devHandle refers to either an IEEE 488 interface or an external device.
RETURNS -1 if error
MODE CA