Consume and produce bit/byte definitions – Rockwell Automation 1734-SSI POINT I/O Synchronous Serial Interface Encoder Module Installation Instructions User Manual
Page 13
POINT I/O Synchronous Serial Interface Absolute Encoder Module 13
Publication 1734-IN581D-EN-E - January 2014
Consume and Produce Bit/Byte Definitions
Byte
Bit
Produce 0
0…7
Low byte of present low SSI word. Bit 0 is the least significant bit of the
entire present SSI word.
Produce 1
0…7
High byte of present low SSI word.
Produce 2
0…7
Low byte of present high SSI word.
Produce 3
0…7
High byte of present high SSI word. Bit 7 is the most significant bit of the
entire present SSI word.
Produce 4
0…7
Low byte of stored low SSI word. Bit 0 is the least significant bit of the
entire stored SSI word.
Produce 5
0…7
High byte of stored low SSI word.
Produce 6
0…7
Low byte of stored high SSI word.
Produce 7
0…7
High byte of stored high SSI word. Bit 7 is the most significant bit of the
entire stored SSI word.
Consume and Produce Bit/Byte Definitions
Byte
Bit
Description
Produce 8
7
6
5
4
3
2
1
0
Status byte 0
(1)
C2ST
C1ST
C2R
C1R
INC
DEC
RUN
I1
Produce 9
7
6
5
4
3
2
1
0
Status byte 1
(2)
RES
RES
RES
LHON
IDF
2
CCE
CCF
SPF
(1)
For detailed descriptions of these bits, see 1734-SSI User Manual, publication
(2)
Monitor IDF to determine the validity of the produced data. If IDF=1, the SSI data is false.
Consume and Produce Bit/Byte Definitions
Byte
Bit
Description
Consume 0
7
6
5
4
3
2
1
0
Master ACK
byte
(1)
RES
RES
RES
SCMP2
SCMP1
CC2
CC1
LACK
Consume 1
7
6
5
4
3
2
1
0
CONS1
RES
RES
RES
RES
RES
RES
RES
RES
(1)
The master must provide the master ACK byte to receive the polled produced bytes 0…9.