Rockwell Automation 1771-DE Absolute Encoder Module User Manual User Manual
Page 67
Appendix C
CĆ8
Rung 1
200/06 and 200/4 are returned in the read operation and latch
077/00. When 077/00 is latched, the module toggles between a
read operation and a write operation.
121/00 is optional and lets the processor initiate a
blockĆtransferĆwrite operation.
Rung 2
This rung examines the writeĆdoneĆbit (122/06) and the valid
BCD data bit (200/04) to unlatch 077/00 and begin the
readĆonly operation.
Rung 3
This rung contains the blockĆtransferĆread instruction.
Rung 4
Use a fileĆtoĆfile move to buffer the read data. Use addresses
0226 and 0227 when making any data comparisons.
Rung 5
A blockĆtransferĆwrite is not done unless 077/00 is on.
Rung 6
This rung is for display purposes only.
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