Installation, Operation and Maintenance Manual
MAN712 Rev. 9
June 2021
Modbus RTU Interface
Section 8: Modbus RTU Interface
77
8.4.5
Function Code 101 (0x65) Read Alarms and
Warnings Logs
This function code is used to read the stored alarms and warnings of the ELBS-20.
If the requested “Alarms/Warnings” is not available (different from 1 or 2),
Exception Code 03 (0x03) is generated. Broadcast messages are not allowed.
The ELBS-20 stores up to 50 Alarms Logs and up to 50 Warnings Logs.
The ELBS-20 Modbus Interface allows reading 25 Alarms or Warnings Logs per time.
The Following table lists the fields that must be used for Read Alarms and Warnings
Logs Query:
Table 22.
Field Name
Bytes
Range Value
Description
Alarms/Warnings
1
1, 2
1 = Alarms
2 = Warnings
Log Part
1
0, 1
0 = 25 most recent
1 = 25 least recent
The following table lists the fields that are returned in a Read Data Event Response:
Table 23.
Field Name
Bytes
Range Value
Description
Alarms/Warnings
1
1, 2
1 = Alarms
2 = Warnings
Log Part
1
0, 1
0 = 25 most recent
1 = 25 least recent
Alarm ID or Warning ID #1
1
-
#1 is the most recent out of 25
See tables on the next page
Status #1
1
0,1
0 = Cleared
1 = Activated
Date and Time #1
4
-
Byte 1 = LSB
Elapsed seconds from 01-Jan-2000
Alarm ID or Warning ID #2
1
-
#2 is the second most recent out of 25
See tables on the next page
Status #2
1
0,1
0 = Cleared
1 = Activated
Date and Time #2
4
-
Byte 1 = LSB
Elapsed seconds from 01-Jan-2000
Alarm ID or Warning ID #25
1
-
#25 is the least recent out of 25
See tables on the next page
Status #25
1
0,1
0 = Cleared
1 = Activated
Date and Time #25
4
-
Byte 1 = LSB
Elapsed seconds from 01-Jan-2000