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8.4 Tab "IO-Port"
This menu allows to configure the IO-Ports of the evaluation unit .
Each IO-channel can be configured to mode „Inactive“, „Input“, „Output“ and „RWH“ .
Mode
Function
Inactive
No function, inactive
Input
IEC 61131 input
Output
IEC 61131 output
RWH
RFID read/write head (Type ANT4xx or ANT5xx)
“Data hold time” define how long the RFID data are kept stable . This is helpful if the time interval, in which
the RFID tag data are available, is shorter than the host can read these from the RFID unit .
“Number of blocks” define the number of blocks available on the RFID tag .
“Block size” define the number of bytes per block available on the RFID tag .
If the value "Block size" does not match the physically value of the RFID tag, the read and write
commands will fail .
“UID edge controlled" allow the reading of the UID of the RFID tag once by setting bit "RD" from 0 to 1 in
the process data output image of the controller . This mode is suitable if the user knows when the RFID
tag is present in front of the read/write head . The read UID is kept in the data bytes 2…18 stable while bit
RD is set to 1 .
►
Set “Overload detection” to “off” if the load on terminal “L+” is above 0,5 A .
The current is limited to 0,7 A by hardware .
