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10
Configuration
3.3 Error output
RS422 compatible differential output.
Indicates an error on either channel or a hardware error.
!
WARNING: The error output is not a fail-safe method
and therefore additional safety precautions must be taken in
safety critical closed loop applications. The error line must be
continually monitored and the motion system must be stopped if
it is asserted.
Error bits returned to Panasonic controller as ALMC shown in
table 6. Errors reported are for individual channel only.
Table 6 – ALMC error links
Bit
Function
7
Warning - Beam saturation (beam strength > 115%)
6
Warning - Beam low (beam strength < 25%)
5
Error - not used reads 0
4
Error - not used reads 0
3
Error - EEPROM CRC error during read of scale and offset
settings - can't be cleared
2
Error - Beam break (beam strength < 12.5%)
1
Error - Overspeed
0
Error - Encoder error (from RLE)
Errors and warnings are cleared when the Panasonic controller
is power cycled.
EEPROM CRC error can only be cleared by power cycling
the RLI20.
3.4 LED indicators
Status Ax 1 / Status Ax 2.
Table 7 shows the axis status for a give LED colour illumination.
Table 7 – Status Ax 1 / Status Ax 2 LED indicators
LED
Status
Red
Error
Amber
Warning
Green
OK
Error
The error LED shows red under any hardware or axis error.
Power
The power LED shows green to indicate the device is
powered up.
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