AMM5A & AMM5B • SSI, BiSS, & RS-485
7.4.1 Encoder errors
See the ALMC byte in the previous “7.4 Data Field” section.
Flag
Explanation
How to
clear
BUSY flag
(BUSY)
Function: There is a delay which is needed for the
encoder to successfully process data at power-on. Or
the encoder is accomplishing a reset command. The
flag shows that the encoder is not ready to process
data, logical value “1” is outputted. All position data
for this period are fixed to “0”. After the delay has
expired, logical value is returned to “0”.
Detection timing: upon normal operation (when the
main power is turned on)
Output: Non latch
Auto clear
(turning
speed is
decreased
to 300 rpm
or less)
PS error
(PSERR)
Function: it is intended to monitor the
synchronization between the “Singleturn counting”
and the “Multiturn counting”. It further warns about
a counting error.
Detection timing: upon normal operation
Output: Latch
Turn on the
main power
twice
or
reset the
error (ID 7,
ID C, see
the next
section)
ST error
(STERR)
The alarm is triggered if a period counter consistency
error occurs. An error occurred while checking
counted data and calculated data.
Detection timing: in normal operation
Output: Latch
Turn on the
main power
twice
or
reset the
error (ID 7,
ID C, see
the next
section)
Battery
alarm
(BATT)
Function: the alarm is triggered when external
battery voltage falls below 3.15V.
Detection timing: in normal operation
Output: Latch
Reset the
error (ID 7,
ID C, see
the next
section)
MT error
(MTERR)
Function: the alarm is triggered when the external
battery voltage falls below 3.05V.
Detection timing: in normal operation
Output: Latch
Reset the
error (ID 7,
ID C, see
the next
section)
MAN AMM5A_B SSI_BiSS_RS485 E 1.9.odt
7 – RS-485 serial interface
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