ICP DAS USA I-7083 User Manual page 7

If the value of XOR control bit is error, the encoder value will
have different errors given as follows:
The counting direction will be inverted
The encoder value has error count = 1
The Z is inverted
User can use $AASN command to check the status of A,B,Z.
All A,B,Z are expected to be Low in the normal state & High in
the active state. The check sequences are given as follows:
step command
1 $01S0
2 $01S1
3 $01S2
Step 1: check A0,B0 & Z0 must be all Low, M=mode
Step 2: check A1,B1 & Z1 must be all Low, M=mode
Step 3: check A2,B2 & Z2 must be all Low, M=mode
Refer to Sec. 2.18 for more information about $AASN
command
Refer to Sec. 1.6.6, Sec. 1.6.7 & Sec. 1.6.8 for more
information about M=mode
Some error results are given as follows: (assume in the normal
state)
step command
1 $01S0
2 $01S1
3 $01S2
Step 1: XOR0 is setting error, A0,B0 & Z0 must be Low
Step 2: XOR1 is setting error, A1,B1 & Z1 must be Low
Step 3: XOR2 is setting error, A2,B2 & Z2 must be Low
I-7083/7083D/7083B/7083BD User Manual (V 1.1, Dec/2007) ------------------ 7
response
!01M0
!01M0
!01M0
response
!01M7
!01M7
!01M7