Rockwell Automation 1771-DE Absolute Encoder Module User Manual - Manual (Page 39)

Offset Programming
Chapter 5
5Ć8
Rung 1 200/06 and 200/04 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,
conditioned by the read done bit and the write enable bit.
Rung 4 Use a fileĆtoĆfile move to buffer the read data. Use addresses
0226 and 0227 when making any data comparisons.
Rung 5 This rung contains the blockĆtransferĆwrite instruction,
conditioned by the write done bit and the read enable bit.
Rung 6 This rung is for display purposes only.