Yokogawa PR300 Power and Energy Meter - Manual (Page 79)

4-18
<Toc> <Ind> <4. PC Link Communication Protocol>
IM 77C01E01-10E
‘=== Subroutine ===
*RECEIVECHR ‘Interruption processing during
receiving
interval off ‘Start timer
RCVCHR$=RCVCHR$+input$(lof(#1),#1) ‘Fetch character string
from receive buffer.
END$=mid$(RCVCHR$,len(RCVCHR$),1)
select case END$
case LF$ ‘Echo-back-capable
RCVCHR$=”” ‘Initialize receive character string
case CR$ ‘Receiving end flag
STOPFLAG=1 ‘Set receiving end flag
case else
end select
interval on ‘Start timer
return
‘
*TIMEOUT ‘Timeout processing
STOPFLAG=1 ‘Set timeout flag
RCVCHR$=”Time out ! (5 sec)”+CR$
‘Character string for display
on screen “Time out ! (5 sec)”
return