RACOM RipEX2, Руководство пользователя

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device must always contain the respective Slave address and the address position, relative to the be-
ginning of the message (packet, frame), is always the same (
Address position ). Generally, two com-
munication modes are typical for UNI protocol: In the first one, communication is always initiated by
the Master and only one response to a request is supported; in the second mode, Master-Master
communication or combination of UNI protocol with ASYNC LINK protocol and spontaneous packets
generation on remote sites are possible.
The UNI protocol is fully transparent, i.e. all messages are transported and delivered without any
modifications.
Mode of Connected device
List box: {Master, Slave}, default = Master
Adress mode
List box {Binary (1B); ASCII (2B); Binary (2B LSB first); Binary (2B MSB first)}, default = "Binary
(1B)"
Protocol address format and length (in Bytes). ASCII 2-Byte format is read as 2-character hexa-
decimal representation of one-byte value. E.g. ASCII characters AB are read as 0xAB hex (10101011
binary, 171 decimal) value (the ASCII-2-Byte format function will be available in a future FW release).
Address position
Number {1 – 255}, default = 1
Specify the sequence number of the byte, where the Protocol address starts. Note that the first
byte in the packet has the sequence number 1, not 0
Poll response control
List box {On; Off}, default = "On"
"On" – The Master accepts only one response per a request and it must come from the specific
remote to which the request has been sent. All other packets are discarded. This applies to the
Master - Slave communication scheme.
Note
It may happen, that a response from a slave (No.1) is delivered after the respective timeout
expired and the Master generates the request for the next slave (No.2) in the meantime.
In such case the delayed response from No.1 would have been considered as the response
93 © RACOM s.r.o. – RipEX2 Radio modem & Router
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