Rockwell Automation 1771-DE Absolute Encoder Module User Manual - Manual (Page 35)

Offset Programming
Chapter 5
5Ć4
Figure 5.1
Format of BlockĆtransferĆwrite Data with Offset
17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00
OE ZT < Word #1 > = < > = OE ZT < > = < > =
Control Word for
Outputs 0 and 1
2 Preset 0A
3 Preset 0B
4 Preset 1A
5 Preset 1B
OE ZT < 6 > = < > = OE ZT < > = < > =
Control Word for
Outputs 2 and 3
7 Preset 2A
8 Preset 2B
9 Preset 3A
10 Preset 3B
OE ZT < 11 > = < > = OE ZT < > = < > =
Control Word for
Outputs 4 and 5
12 Preset 4A
13 Preset 4B
14 Preset 5A
15 Preset 5B
OE ZT < 16 > = < > = OE ZT < > = < > =
Control Word for
Outputs 6 and 7
17 Preset 6A
18 Preset 6B
19 Preset 7A
20 Preset 7B
21 Offset Value
22 No. of Encoder Positions
S
A. Write-data words
B. Format of control
word #1
OE ZT < > = < > = OE ZT < > = < > =
COM for
Preset 1B
COM for
Preset 1A
COM for
Preset 0B
COM for
Preset 0A
OE = Output Enable Bit
ZT = Zero Transition Bit
COM = Comparison Bit
S = Offset Sign Bit
10698ĆI
BlockĆtransferĆread Data with Offset
The upper byte of word 1 indicates the status of the eight outputs
controlled by the module. The module sets each bit when the
corresponding output is turned on.
The lower byte of word 1 (by bit) is: