Lufft SHM31 User Manual

UMB communication
38 Snow depth sensor SHM 31, V2.1
UMB channel
act
min
max
avg
Measured variable
Data type
Unit
700
snow flag
uint8
logic
800
801
802
803
signal normalized
uint8
norm value
890
snow signal threshold
uint8
norm value
4000
device status
if not 0 please contact support
uint16 digits
4003
RS485 status
if not 0 please contact support
uint16 digits
4007
system time
uint32
s
4010
heater block state
0: off
1: active in 12 V mode
2: active in 24 V mode
3: defrost mode (12 V)
4: defrost mode (24 V)
5: heating via external input
EXT_TRIG_IN deactivated
6: deactivated due to internal
voltage control error
7: deactivated due to wrong
configuration or faulty temp. value
uint16 digits
4011
internal NTC temp
raw value for internal temperature
float32 °C
4013
block defrost time
remaining time in defrost mode
uint16 s
4020
heater window state
0: off
1: active in 12 V mode
2: active in 24 V mode
3: defrost mode (12 V)
4: defrost mode (24 V)
5: heating via external input
EXT_TRIG_IN deactivated
6: deactivated due to internal
voltage control error
7: deactivated due to wrong
configuration or faulty temp. value
uint16 digits
4021
external NTC temp
raw value for external temperature
float32 °C
4023
window defrost time
remaining time in defrost mode
uint16 s
4100
shm31 error
the error codes for the device
are listed in table
Error!
Reference source not found.
uint8 shm30 code
4101
shm31 error (current)
internal error handling
uint8 shm30 code
Table 14: Measuring channels 700 – 4999
UMB channel
act
min
max
avg
Measured variable
Data type
Unit
5000
laser gain
uint8
raw code
5001
laser sig. strength
int32
µV
5002
laser distance
float32
mm
5003
laser temperature
float32
°C
5004-5030
laser error statistic
uint32
raw code

Lufft SHM31 Specifications

General

Brand	Lufft
Model	SHM31
Category	Accessories
Language	English