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MELSEC-Q
11 INSTRUCTIONS AND FUNCTIONS
Program Example
(1) Program example for a format 1 control table
100 ' A program example that writes data to buffer memory 0 of the special function module (A62DA)
110 ' (Starting address of A62DA: &H0A)
120 DIM TBL%(5),A%(0)
:
'Defines arrays
130 TBL%(0)=255
:
'Specifies the station number to
communicate with to the local station
140 TBL%(1)=12
:
'Specifies to write data to buffer memory
150 TBL%(2)=&HA
:
'Specifies the module number
160 D!=&HA0
:
'Specifies the buffer memory address
170 H!=INT(D!/65536!)
180 H$=RIGHT$("0000"+HEX$(H!),4)
:
'Higher byte of the buffer memory address
190 L$=RIGHT$("0000+HEX$(L!),4)
:
'Lower byte of the buffer memory address
200 TBL%(3)=VAL("&H"+L$)
:
'Stores the lower byte in the control table
210 TBL%(4)=VAL("&H"+H$)
:
'Stores the higher byte in the control table
220 TBL%(5)=2
:
'Specifies the number of bytes to be written
230 A%(0)=&H3E8
:
'Specifies the values to be written
240 PCWT TBL%( ),A%( ) :
:
'Executes the write operation
250 END
(2) Program example for a format 2 control table
100 ' A program example that writes data to buffer memory 0 of the special function module (A62DA)
110 ' (Head address of A62DA: &H0A)
120 DIM TBL%(8),A%(0)
:
'Defines arrays
130 TBL%(0)=256
:
'Specifies a format 2 control table
140 TBL%(1)=1
:
'Specifies network number 1
150 TBL%(2)=1
:
'Specifies station number 1
160 TBL%(4)=12
:
'Specifies to write data to buffer memory
170 TBL%(5)=&HA
:
'Specifies the module number
180 D!=&HA0
:
'Specifies the buffer memory address
190 H!=INT(D!/65536!)
200 H$=RIGHT$("0000"+HEX$(H!),4)
:
'Higher byte of the buffer memory address
210 L$=RIGHT$("0000+HEX$(L!),4):
:
'Lower byte of the buffer memory address
220 TBL%(6)=VAL("&H"+L$)
:
'Stores the lower byte in the control table
230 TBL%(7)=VAL("&H"+H$)
:
'Stores the higher byte in the control table
240 TBL%(8)=2
:
'Specifies the number of bytes to be written
250 A%(0)=&H3E8
:
'Specifies the values to be written
260 PCWT TBL%( ),A%( ) :
:
'Executes the write operation
270 END
