Rockwell Automation 1771-OFE/B Analog Output Module User Manual - Manual (Page 72)

B-2
Publication 1771Ć6.5.30 - November 1998
Rungs 2 and 3
These OUTPUT ENERGIZE instructions (012/01 and 012/02)
define the number of words to be transferred. This is accomplished
by setting a binary bit pattern in the module’s output image table
control byte. The binary bit pattern used (Bits 01 and 02 energized)
is equivalent to six words or channels and is expressed as 110 in
binary notation.
Rung Summary
Once the block transfer read operation is complete, the processor
automatically sets Bit 07 in the input image table status byte and
stores the block length of the data transferred.
Figure B.1
Multiple GET Instructions
Data Table 07
1
R
Control
Byte
010
012
017
027
030
060
065
110
112
117
130
Output Image Table Control
Byte Contains Read
Enable Bit and Block
Length in Binary Code
Data Address
Contains Module
Address in BCD
Input Image Table
Status Byte
Contains Done Bit
Storage Location
Contains File
Address in BCD
R = Read 07 = Bit
1 2 0
07
1
R
Status
Byte
0 6 0
Output
Image Table
Timer/Counter
Accumulated
Values Area
Input
Image
Table
Timer/Counter
Preset
Values Area
First Address,
Destination of
Transferred Data
12994
113
02
012 030
120
130
060
G G
07
012
01
012
02
1
2
3