SIMATIC RF382R Scanmode
8
J31069-D0214-U001-A4-7618, 10/2013
Note
Extension of the data transmission time if distance values are undershot
If the distance values specified in the tables are undershot, it is possible that the inductive fields will be affected. The time
required for data transmission can increase unpredictably.
For this reason, please observe the values in the tables.
9
Host-reader communication and parameterization
9.1
Introduction
In the scan mode, data are transferred automatically to the host via the serial interface when the reader is switched on. The
type of data collection and transfer is preset in the reader using parameters.
The communication protocol described here and its possible parameterization require a reader firmware version of 1.4 or
higher.
For commissioning, it is also possible to communicate with the reader during operation. For this, the host sends a telegram
via the serial interface that is processed and acknowledged in the reader.
The following functions are available for the commissioning:
●
Change parameter
●
Read status (incl. parameter)
●
Switch on test mode
9.2
Communications
Basic principles
The communication between host and reader occurs using the interface parameters set in the reader. After delivery, the
setting is as follows:
●
Baud rate 38400
●
Parity none
●
8 data bits, 1 stop bit
●
Physics
–
RF310R: RS-422
–
RF38xR: RS-232
The additional parameters for data transfer from the reader to the host (ASCII/binary MSB/LSB) are not used for the
exchange of telegrams. As described in the following chapters, telegram communication is binary.
Note
Loss of transponder information in host-reader communication during operation
When you start the communication between host and reader during commissioning, make sure that there are no
transponders in the antenna field.
If there us a transponder in the antenna field, it is possible that the acknowledgment data (frame from the reader to the host
with the parameters of the reader) also includes reply data of a transponder. If this is the case, this reply data of the
transponder is lost for the application. In addition to this, the acknowledgment, for example of "Read parameter" is corrupted
by transponder data.
