Rockwell Automation 1771-IR Series D RTD Input Module User Manual User Manual
Page 62
Block Transfer (Mini–PLC–2 and PLC–2/20 Processors)
D–2
Publication 1771Ć6.5.129 - March 2000
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 6 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 D.1
Multiple GET Instructions (Mini-PLC-2 and PLC-2/20 Processors
Only)
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
12172
113
02
012
07
G
G
012
01
012
02
030
130
120
060
Rung 1
Rung 2
Rung 3
Multiple GET Instructions