HORNER HE-XRZ2, Быстрый старт

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MAN0943-01 19 MAR 2007 PAGE 11
The OPEN function block Baud rate and frame parameters (Parity, Data bits, etc…) must be set
to match that of the HE-XRZ2. The factory default setting of these parameters are
9600, 8, N,
and 1. It is possible to program the HE-XRZ2 for a different baud rate and frame protocol and
save those values to non-volatile memory; however, it is left to the user to record those values
and set the OPEN function block appropriately.
Once the MJ1/Option port is opened in Radio mode, it is ready to start transmitting data;
however, it may be desired to change modes of operation, source and destination addresses, or
add encryption. This requires entering command mode though the sending of a “+++” sequence
to the HE-XRZ2 followed by the appropriate “AT” commands by using SEND function blocks.
The “AT” commands and corresponding transmit modes are covered in detail in the MaxStream
XBEE Pro OEM RF Module – Product Manual, available at:
http://www.maxstream.net/products/xtend/product-manual_XTend_OEM_RF-Module.pdf .
When transferring data, handshaking is generally not required for messages less than 2K
bytes. The HE-XRZ2 breaks larger messages into smaller packets for transfer between HE-
XRZ2 modems. Note that Modbus RTU communications may be unreliable if the HE-XRZ2
packet size or transfer method is not configured for complete RTU message transfer without
breaking into individual transfer packets. Refer to MaxStream XBEE Pro OEM RF Module –
Product Manual for setting packet size and transfer methods.
Once the HE-XRZ2 is properly Opened , SEND/RECV or MODBUS function blocks may
used to transfer data.
User access to SLEEP and CONFIG pins on the MaxStream XBEE Pro are not supported on the
HE-XRZ2. Likewise CMD mode is not supported since CSCAPE applications cannot directly
access the RTS handshake line.
NOTES