Rockwell Automation 1771-IXE/D Thermocouple/Millivolt Input Module User Manual - Manual (Page 68)

Block Transfer (Mini–PLC–2 and PLC–2/20 Processors) D–2
Publication 1771-6.5.130 Ć May 1999
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
The input module transfers a specific number of words in one block
length. The number of words transferred is determined by the block
length entered in the output image table control byte corresponding
to the module’s address.
Setting the Block Length
(Multiple GET Instructions
only)