ALTUS Nexto Series User Manual

5. CONFIGURATION
Direct Rep-
resentation
Variable
Diagnostic Variable
T_DIAG_MODBUS
_ETH_MAPPING_1.*
Size Description
Communication statistics:
%QB(n+3)
byDiag_3_reserved
BYTE Reserved.
%QW(n+4)
wCommCounter
WORD
Communications counter terminated, with
or without errors. The user can test when
communication has finished testing the
variation of this counter. When the value
65535 is reached, the counter returns to
zero.
%QW(n+6)
wCommErrorCounter
WORD
Communications counter terminated with
errors. When the value 65535 is reached,
the counter returns to zero.
Table 113: MODBUS Client Relations Diagnostics
Notes:
Exception Codes: the exception codes show in this filed is the server returned values. The definitions of the exception
codes 128, 129 and 255 are valid only with Altus slaves. For slaves from other manufacturers these exception codes can have
different meanings.
Disabling Variable: field for the variable used to disable MODBUS requests individually configured within requests. The
request is disabled when the variable, corresponding to the request, is equal to 1, otherwise the request is enabled.
Last Error Code: The codes for the possible situations that cause an error in the MODBUS communication can be
consulted below:
Code Enumerable Description
1 ERR_EXCEPTION
Reply is in an exception code (see eLastExceptionCode
= Exception Code).
2 ERR_CRC Reply with invalid CRC.
3 ERR_ADDRESS
MODBUS address not found. The address that replied
the request was different than expected.
4 ERR_FUNCTION
Invalid function code. The reply’s function code was dif-
ferent than expected.
5 ERR_FRAME_DATA_COUNT
The amount of data in the reply was different than ex-
pected.
7 ERR_NOT_ECHO The reply is not an echo of the request (FC 05 and 06).
8 ERR_REFERENCE_NUMBER Invalid reference number (FC 15 and 16).
9 ERR_INVALID_FRAME_SIZE Reply shorter than expected.
20 ERR_CONNECTION Error while establishing connection.
21 ERR_SEND Error during transmission stage.
22 ERR_RECEIVE Error during reception stage.
40 ERR_CONNECTION_TIMEOUT Application level time-out during connection.
41 ERR_SEND_TIMEOUT Application level time-out during transmission.
42 ERR_RECEIVE_TIMEOUT Application level time-out while waiting for reply.
43 ERR_CTS_OFF_TIMEOUT Time-out while waiting CTS = false in transmission.
44 ERR_CTS_ON_TIMEOUT Time-out while waiting CTS = true in transmission.
128 NO_ERROR No error since startup.
Table 114: MODBUS Relations Error Codes
138

ALTUS Nexto Series Specifications

General

Brand	ALTUS
Model	Nexto Series
Category	Computer Hardware
Language	English