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12.4.8 Diagnostic and status messages
LED status displays
Diagnostics
This module has the following diagnostic data per channel:
Diagnostic byte assignment, Process input data (page 398).
LED Display Meaning Remedy
DIA Red Module bus communi-
cation failure
Check if more than two ad-joining electronics mod-
ules have been pulled. This concerns modules
located between this module and the gateway.
Check the supply of the module bus.
Red
flashing, 0.5
Hz
Diagnostics pending
Diagnostics
-
Off No error messages or
diagnostics
–
TxD Green Data transmission active -
Off No data transmission -
RxD Green Data are currently
received
-
Off No data are received
Diagnostics Meaning
buffer overflow
(Buf_Ovfl)
Overflow of the receive-buffer (RX-buffer).
Frame error
(Frame_ERR)
The RS485/422-module has to be parameterized for adaptation to the
data structure of the data terminal equipment (DTE).
A frame error occurs in case of inconsequent parameterization (num-
ber of data bits, stop bits, method of parity,...).
Data flow control error
Data flow control
(HndSh_ERR)
The DTE connected to the RS485/422-module does not react to XOFF
or RTS handshake.
The internal receive-buffer may overflow (buffer-overflow = 1).
Hardware error
(HW_Fail)
The module has to be replaced (e.g. error in EEPROM or UART)
Parameterization error
(PRM_ERR)
The parameter settings can not be supported.
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