Alarm Status Clear - Ebyte E90-DTU User Manual

Chengdu Ebyte Electronic Technology Co., Ltd.
0x00
0x01
0x02
If the level 2 is used, the alarm status register needs to be cleared after the alarm is generated, otherwise the
device reports three times to automatically cancel the alarm in a period of 5s, and immediately cancels the alarm
status after receiving the clear alarm clear;
The format for reporting an alarm is as follows:
"Header": the first byte, used to identify the data frame as alarm data;
"Trigger Device Address": the second byte, the slave address that triggers the alarm state;
"Fixed": the third and fourth bytes, fixed at 0x0302;
"Alarm source" and "Data"：
battery voltage
"2Byte-CRC": The last 2 bytes represent Modbus-CRC checksum data；

4.8.2 Alarm status clear

Demonstration of alarm level 2 clearing DI as an example:
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turn off the
alarm
send once
If the clear command is not received, it will be
at least once
reported three times with a cycle of 5s
Type Alarm source
DI
AI
Disable alarm function
Send an alarm message
0x0001 0x0001 (fixed)
reserved (not
0x0002
supported)
0x0004 Battery voltage, in mV
E90-DTU(400SL30L)_UserManual_EN
Data
22