90 User Manual Synertia® RF Generator
The information contained in this manual is subject to change by Comet Yxlon without prior notice.
10.1.3 SHFT protocol – Response
Once the generator has received the request from the host, it starts to interpret it. The
generator distinguishes between three types of requests:
• Read commands
• Write commands
• Invalid requests
The structure of the response from the generator depends on the detected type of
request.
10.1.4 Response to a read command
If the generator receives a valid read command (FC = 0x41), it answers with a response
that consists of header and data. The table below shows the structure of a response to a
read command.
ta
Between 0 and 249 bytes of data
Number of trailing
data bytes
Table 26: Structure of a response to a read command
• Header
The header of a response to a read command consists of three bytes. The first
byte contains the address of the generator and is the fixed value 0x0A. The
second byte contains the function code of the request. Since the request was
identified as a read command, this value is necessarily 0x41. The third byte
contains the number of trailing data bytes. This information is particularly helpful
when the number of returned data bytes is variable, for example when the
response consists of a string.
• Data
The number and type of data bytes sent in the response of the generator depends
on the requested command or parameter number. For details, see 10.3 „ List of
parameters“ on page 102.
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