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IUH-F190-V1-*, IUT-F190-R4-V1*
Operation
WP1UTA.00.01.03 permits 3 attempts
RP1UTA.00.00 outputs the permitted number of attempts
If the permitted number of write or read attempts between the read/write head and the tag is
increased, this results in:
More reliable reading and writing.
Increased response time.
6.7
Read/Write Head IUT-F190-R4-V1-* with Integrated RS-485 Interface
The IUT-F190-R4-V1-* read/write head is connected to the RS-485 serial interface of the
parent device via a point-to-point connection. The read/write head has an internal terminator on
the RS-485 interface. Only 1 read/write head can be connected within an RS-485 network. It is
not possible to build an RS-485 network with multiple read/write heads.
Note!
If you use an RS-485/RS-422 to RS-232 converter with automatic baud rate and mode
detection, communication problems may occur due to incorrect detection of these parameters.
In this case, select the operating mode of the converter manually.
The read/write head can be used in single-drop-mode and in multi-drop mode. In single-drop-
mode, the read/write head first executes the respective command and then sends the
response. This may take a few seconds. In multi-drop mode, the read/write head immediately
sends the confirmation that the read head has understood the command. The read head then
starts to execute the command. The actual result of the command must be queried by polling
the read/write head.
The IUT-F190-R4-V1-* read/write head is set to single-drop mode at the factory.
Define Function DF
This command is used to switch operating mode:
Single-drop --> Multi-drop
Command:
Multi-drop --> Single-drop
Command:
After changing the operating mode, a power supply reset or an "RS" command must be
executed to activate the required operating mode.
6.7.1
Single-drop mode
In this operating mode, the read/write head first executes a command and then sends the
response. This may take a few seconds. The command syntax is identical to the syntax of the
read/write heads with the IDENTControl control interface, but does not contain the channel
number <ChanNo>.
Example!
Command: <CommandCode> <CommandParameters> <CHCK> <ETX>
Response: <Status> <Data> <CHCK> <ETX>
You also have the option of replacing <CHCK><ETX> with #<CR>.
A new command can be sent only after a response to the previous command has been
received.
60
DF42 <CHCK> <ETX>
DF <DeviceNo> 41 <CHCK> <ETX>
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