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11 INSTRUCTIONS AND FUNCTIONS
Program Example
(1) Program example for a format 1 control table
100 ' A program example that reads extension file registers by specifying sequential addresses
110 DIM TBL%(4),A%(9)
120 TBL%(0)=255
130 TBL%(1)=7
140 D!=0
150 H!=INT(D!/65536!)
160 L!=D!-H!*65536!
170 H$=RIGHT$("0000"+HEX$(H!),4)
180 H$=RIGHT$("0000"+HEX$(L!),4)
190 TBL%(2)=VAL("&H"+L$)
200 TBL%(3)=VAL("&H"+H$)
210 TBL(4)=10
220 PCRD TBL%( ),A%( )
230 FOR I=0 TO 9
240 PRINT A%(I)
250 NEXT I
260 END
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• Assign values to %(2) and %(3) ( %(5) and %(6) in case of a control table
of format 2) in the following manner.
D!
• • • • • •
Device number expressed in sequential address
H!
L!
• • • •
Used as a work area.
H$
L$
to
100 H!=INT(D!/65536!)
110 L!=D!-H1*65536!
120 H$=RIGHT$("0000"+HEX$(H!))
130 L$=RIGHT$("0000"+HEX$(L!))
140 %(2)=VAL ("&H"+L$)
150 %(3)=VAL ("&H"+H$)
to
In case of a control table of format 2
• • • • • •
%(5)=VAL ("&H"+L$)
• • • • • •
%(6)=VAL ("&H"+H$)
:
'Defines arrays
:
'Specifies the station number to
communicate with to the local station
:
'Specifies to read extension file register by
specifying sequential addresses
:
'The upper byte of the sequential address
:
'The lower byte of the sequential address
:
'Stores the lower byte in the control table
:
'Stores the upper byte in the control table
:
'Specifies to read for 10 points
:
'Executes the read operation
:
'Displays the data read
MELSEC-Q
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