User's Guide ______________________________________________________________________
170 _________________________________________________________________ M210667EN-C
Table 26
LT31 Transmitter: Miscellaneous (Byte Number 33)
Code Explanation
Comment
0 OK,
normal
operation
4 Window
heater
error
Temperature difference between
window and enclosure temperature
below limit when heater is on.
8 Alignment
mechanism
No horizontal and/or vertical
position signal.
No movement.
NOTE
The listed status codes do not cover all possible cases. Combinations are
possible if applicable. If, for example, code 1 and code 2 occur at the
same time, it will lead to code 3.
The byte shown in Table 27 below indicates the overall status of the
LTR111 (LT31 receiver unit).
Table 27
LT31 Receiver Status (Byte Number 34)
Code Explanation
Comment
0 OK
W Warning
Examples:
Window receiver is saturated.
Window transmitter light source
aging warning.
Window contamination above limit.
A Alarm
Examples:
Main receiver saturated.
Internal monitoring alarm signal
exceeded limit.
E Error
Hardware
error.
C Communication
error
Device not responding on module
bus request.
The byte shown in Table 28 below indicates the status of the LT31
master CPU LTC212 which is located in the receiver interface unit
LTI211.
Table 28
LT31 Receiver: Master CPU Status (Byte Number 35)
Code Explanation
Comment
0 OK
4 Hardware
warning
8 Error
Memory
error