Advantech PCLS-848-P, User Manual

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4 8 PCLS-848-P User's Manual
3.4.20. ietimout
NAME:
ietimout — Sets the bus timeout period.
SYNTAX:
ietimout(tout);
tout:integer; tout:=0 Disable the timeout function.
tout:=1 to 32767 Timeout period is tout units.
(See CAUTION 1)
tout:=-1 to-32768 Timeout period is (65536+ tout) units.
DESCRIPTION:
This procedure sets the timeout period. When the bus handshake is stuck, the
called VO procedure will terminate at the time specified and the timeout flag will
be set. BUS ACTIVITY: None.
CAUTION:
1. The unit of the timeout period depends on the execution speed of the CPU.
For PC/XT of 4.77 MHz clock rate, the unit is one millisecond. For PC/AT
and higher clock, rate CPU, the unit is less.
2. The timeout period is set to 10000 units each time the procedure ieinit is
called.
3. The name of this procedure is “ietimout”. It is NOT “ietimeout”.