Rockwell-automation 1771-OFE/B Analog Output Module User Manual Manuel d'utilisateur Page 73

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Vue de la page 72
B-3
/'%.%*) 2 *0!(!, 
The output module is capable of transferring up to 13 words in one
program scan. The number of words transferred is determined by the
block length entered in the output image table control byte.
The bits in the output image table control byte (Bits 00-05) must be
programmed to specify a binary value equal to the number of words
to be transferred.
For example, Figure B.2 shows if your output module is set up to
transfer five words, you would set Bits 00 and 02 of the lower output
image table control byte. The binary equivalent of five words, as
stated in the look-up table, is 000101.
Figure B.2
Setting Block Length
.  ,!--
*).%)- * /'!
 ,!-- %) 
/.+/. (#! '! *).,*'
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!)#.$ %) %),1 * !






. '!
*).,*'
1.!
!  *, -
",*( * /'!
'*& ,)-"!,
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

Binary Bit Pattern
Lower Output Image Table Byte
05 04 03 02 01 00
  !"/'.
 
 
 
 
 
 
  
Number of
Words
to Transfer
Setting the Block Length
(Multiple GET Instructions
Only)
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