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12.3.7 Diagnostic and status messages
LED status displays
Diagnostic data
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
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 RS232-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 t the module does not react to XOFF or RTS hand-
shake.
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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