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AMM80 • SSI, BiSS, & RS-485
9 - Diagnostic LEDs
The encoder is equipped with two LEDs, they are meant to show visually a fault
condition during operation.
When you install the encoder, as soon as the power supply is switched on (see
Step 8
), the LEDs blink for a while and then go off, if the installation procedure
is successful.
If at the end of the operation a LED is still on, please repeat the installation
procedure again.
Refer also to the “3 - Mounting instructions” section on page 12.
LED 1 (ERROR)
1. When the LED 1 lights up RED during normal operation, it indicates that
an error is active, such as for instance an incorrect alignment between
the circuitry and the disk:
•
the gap between the circuitry and the disk is out of tolerance
•
the circuitry is not installed properly
2. The LED 1 lights up RED when the battery is spent. The encoder cannot
operate. You are required to replace the battery. See the “4.5.2
Replacement of the battery – ERROR active” section on page 26. See the
MT error on page 47.
NOTE
When the LED 1 is off during normal operation, this means that the encoder is
working properly and the absolute position is output correctly.
LED 2 (WARNING)
1. When the LED 2 lights up RED during normal operation, it indicates that
an error has occurred in the magnetic multiturn system.
It is off when the multiturn system is operating properly.
2. The LED 2 lights up RED when the battery charge level is low. You are
required to replace the battery as soon as possible. See the “4.5.1
MAN AMM80 SSI_BiSS_RS485 E 1.5.odt 9 - Diagnostic LEDs 54 of 60