June 2021
Installation, Operation and Maintenance Manual
MAN712 Rev. 9
Section 8: Modbus RTU Interface
Modbus RTU Interface
76
Example of a request of Read Data Event to device 2 (ELBS-20) for “Event ID” = 5 and
Sensor type = Pressure.
Table 20.
Request
Field Name
Value (HEX)
Address
02
Function Code
48
Event ID
5
Sensor Type
0
CRC
-
Field Name
Value (HEX)
Address
02
Function Code
48
Byte Count
53
Slave ID
00
Run Indicator Status
00
Event ID (2 bytes)
-
Sensor Type (1 byte)
-
Event Type (1 byte)
-
Max Sensor Value (2 bytes)
-
Sample Time (2 bytes)
-
Year (2 bytes)
-
Month (1 byte)
-
Day (1 byte)
-
Hour (1 byte)
-
Minute (1 byte)
-
Second (1 byte)
-
Samples Decimal Digits (1 byte)
-
Samples (230 bytes)
-
CRC
-
Table 21.
Response
