LSIS XBF-AD04A - Page 213

XGB Analog edition manual
6.6.4 Line Open Detection Function
The analog I/O module has a diagnostic function which can detect and indicate open input line, when
voltage input range of DC 1~5V or current input range of DC 4~20mA is selected as its analog input
range. If the module indicates open input line, check the wiring.
(1) If the wiring to the module is open, the Input LED flikers at 1 second intervals and the respective
error code is generated.
(2) Line open detection is available for each channel. However, open indication is provided only for
the channel selected for the operation. The Input LED is common for the input channels 0 and 1,
and flickering if 1 or more channels are open.
Input Connection
Channel
Operation
Input LED
State
Open Line
Flag
Normal
Working On Off
Stopped On Off
Input wire open or
disconnected
Working Flickering (1s) On
Stopped On Off
(3) At line open, the line open flag of the channel turns On, and turns Off at correction.
Open Flag
Description
U0x.01.4
Ch 0 open
U0x.01.5
Ch 1 open
(4) At line open, the least of all input values is indicated.
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