Continuous-copy commands – Rockwell Automation 1785-Vx0B, D17856.5.9 PLC-5 VME VMEbus Programmable Controllers User Manual User Manual
Page 63
Chapter 5
Commands
5-2
The command:
Has the
value of:
Configures the PLC-5/VME processor to
copy a block of data:
Continuous copy to VME
0001
from its data table during each ladder scan.
Continuous copy from VME
0002
into its data table during each ladder scan.
See Appendix A for a sample implementation of this command.
You can only enable these operations when the PLC-5/VME processor is in
Run mode. You can specify up to 1000 words as the transfer length.
These words must be contiguous elements in files, but the transfer can span
files (Figure 5.1).
Figure 5.1
Continuous-Copy Command Structure
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Word
Command word
Response word
Cmd interrupt level
Command interrupt status/ID
Reserved
0
1
2
3
4
15
Reserved
Reserved
Reserved
Reserved
Width
Enable
Address modifier
Data address (high)
Data address (low)
Data size
Data table file number
Element number
Reserved
Reserved
Op interrupt level
Op status/ID
Reserved
5
6
7
8
9
10
11
12
13
14
Continuous-Copy
Commands