Lika AMM5A / BG1 Series, User Manual

Page: 46 / 56

AMM5A & AMM5B • SSI, BiSS, & RS-485
Singleturn encoder position:
DF0: LS byte
DF2: MS byte
position = (DF2 << 16) + (DF1 << 8) + DF0;
with 23 bit resolution:
23 Bit 22 ... 0
0 singleturn encoder position
with 21 bit resolution:
23 22 21 Bit 20 ... 0
0 0 0 singleturn encoder position
with 17 bit resolution:
23 22 21 20 19 18 17 Bit 16 ... 0
0 0 0 0 0 0 0 singleturn encoder position
7.5 Address Field and EEPROM Data Field
Address field:
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
ADD6 ADD5 ADD4 ADD3 ADD2 ADD1 ADD0 MEM
BUSY
ADD6 … ADD0: EEPROM address
MEM BUSY
status: access status to EEPROM can be judged by
MEM BUSY
status. The relationship between
MEM BUSY
status and
the transmission of data from the encoder is referred to
next table;
from Master to encoder
MEM BUSY
must be “0”.
Transmission of encoder data
Description
MEM BUSY ADF EDF
Reading
0
ADF of
request
EEPROM
normal data
Reading is normally
executed
1
ADF of
request
00h
Reading is being
executed
Request for reading is
invalid
Writing 0
ADF of
request
EDF of
request
Request for writing is
received
MAN AMM5A_B SSI_BiSS_RS485 E 1.9.odt 7 – RS-485 serial interface 46 of 56