User Guide
Table Of Contents
16
besides, it will also report a alarm dismiss packet if distance returns back to normal value.
When the abrupt change of temperature is greater than 5 °C, it will report a temperature
threshold packet.
Channel
Type
Description
84
82
(Distance)
3 Bytes,
Distance (2 Bytes) + Alarm Status (1 Byte)
Distance: unit -- mm
Alarm Status:
00 -Alarm dismiss
01 -Alarm
83
67
(Temperature)
3 Bytes,
Temperature (2 Bytes) + Alarm Status(1 Byte)
Temperature: unit -- °C
Alarm Status:
00 -Alarm dismiss
01 -Alarm
Example:
1. Distance Threshold
8482330701
Channel
Type
Value
84
82
(Distance)
Distance: 33 07 =>07 33 = 1843mm = 1.843m
Alarm Status: 01= Alarm
2. Temperature Threshold
8367220101
Channel
Type
Value
83
67
(Temperature)
Temperature: 22 01 =>01 22 = 290 * 0.1 = 29 °C
Alarm Status: 01= Alarm
5.3 Downlink Commands
EM400-TLD supports downlink commands to configure the device. Application port is 85 by
default.
Channel
Type
Description
ff
10 (Reboot)
ff (Reserved)
03 (Set Reporting Interval)
2 Bytes, unit: s
13 (Set Installation Height)
00 = Disable; 01 = Enable