ALTUS Nexto Series User Manual

5. CONFIGURATION
Write Multiple Registers (FC 16): 123
Mask Write Register (FC 22): 1
Read/Write Multiple Registers (FC 23): 121
Write Data Range: this field shows the MODBUS write data range configured for each request. The initial address, along
with the read data size will result in the range of write data for each request.
Diagnostic Variable: The MODBUS request diagnostics configured by symbolic mapping or by direct representation, are
stored in variables of type T_DIAG_MODBUS_RTU_MAPPING_1 for Master devices and T_DIAG_MODBUS_ETH_CLIENT_1
for Client devices and the mapping by direct representation are in 4-byte and 2-word, which are described in Table 91 (n is the
value configured in the %Q Start Address of Diagnostics Area field).
Direct Rep-
resentation
Variable
Diagnostic Variable
T_DIAG_MODBUS
_ETH_MAPPING_1.*
Size Description
Communication Status Bits:
%QX(n).0
byStatus.
bCommIdle
BIT
Communication idle (waiting to be exe-
cuted).
%QX(n).1
byStatus.
bCommExecuting
BIT Active communication.
%QX(n).2
byStatus.
bCommPostponed
BIT
Communication deferred, because the
maximum number of concurrent requests
was reached. Deferred communications
will be carried out in the same sequence
in which they were ordered to avoid in-
determinacy. The time spent in this State
is not counted for the purposes of time-
out. The bCommIdle and bCommExecut-
ing bits are false when the bCommPost-
poned bit is true.
%QX(n).3
byStatus.
bCommDisabled
BIT
Communication disabled. The bCommIdle
bit is restarted in this condition.
%QX(n).4
byStatus.
bCommOk
BIT
Communication terminated previously was
held successfully.
%QX(n).5
byStatus.
bCommError
BIT
Communication terminated previously had
an error. Check error code.
%QX(n).6
byStatus.
bCommAborted
BIT
Previously terminated communication was
interrupted due to connection failure.
%QX(n).7
byStatus.
bDiag_7_reserved
BIT Reserved.
Last error code (enabled when bCommError = true):
%QB(n+1)
eLastErrorCode
MASTER_ERROR
_CODE (BYTE)
Informs the possible cause of the last error
in the MODBUS mapping. Consult Table
114 for further details.
Last exception code received by master:
%QB(n+2)
eLastExceptionCode
MODBUS _EXCEP-
TION (BYTE)
NO_EXCEPTION (0)
FUNCTION_NOT_SUPPORTED (1)
MAPPING_NOT_FOUND (2)
ILLEGAL_VALUE (3)
ACCESS_DENIED (128)*
MAPPING_DISABLED (129)*
IGNORE_FRAME (255)*
137

ALTUS Nexto Series Specifications

General

Brand	ALTUS
Model	Nexto Series
Category	Computer Hardware
Language	English