Error Messages For Invalid Values - JUMO LOGOSCREEN nt Interface Description

4 Modbus protocol description
Response
in the event
of an error
Example

4.9.2 Error messages for invalid values

26
Slave Function
address XX OR 80h
1 byte 1 byte
The function code is OR-ed with 0x80, which means that the MSB (most
significant bit) is set to 1.
Data request:
01 06 1257
Response:
01 86 08
Response is error code 08, because address 0x1257 is write-protected.
For measurements in float format, the error number is shown in the value itself,
i.e. the error number is entered instead of the measurement.
Error code
for float values
37
1.0 x 10
37
2.0 x 10
37
3.0 x 10
37
4.0 x 10
37
5.0 x 10
37
6.0 x 10
37
7.0 x 10
37
8.0 x 10
Error code
1 byte
0001 FCA2
43A6
Errors
underrange
overrange
no valid input value
division by zero
math error
invalid terminal temperature for TE
invalid float value
integrator or statistics destroyed
Checksum
CRC16
2 bytes