Annex
9
gas-net
C1 and C2
Page 9-5
Error
number
Modbus error
designation
Cause of error
01
illegal function
The telegram type received is not
permissible, i.e. it is neither of the 03 nor of
the 16 telegram type.
Only Modbus telegram types with the
functional numbers 03 (= read holding
registers) or 16 (= preset multiple registers)
are needed in the gateway; this why only
these are supported.
02
illegal data address The indicated data address is not
permissible.
04 failure
in
associated device
Other
