SmartHardware RS-485, Руководство пользователя, Страница: 11 / 12

SmartHardware
User Guide STR1000008X
11
v 2.0
V
in max = 40 V for T < 2sek
in both modes V/A
Uses 10-bit ADC. Result is 0 – 1023(0x3FF).
Voltage mode :
The range is 0 – 10.23 V (default). Step = 0.01V . Rin = 91k / custom.
Current mode :
The range is 0 – 20.46 mA (default). Step = 0.02mA . Rsh = 500 ohms.
5. Commands
Check the PDF file with commands for a full explanation. This controller
supports the following commands ( in HEX ):
1, 2, 3, 8, 9, A, 10, 16, 1B, 20, 21, 22, 23, 32, 33
88, 89, 96, 9B
http://smarthardware.eu/manual/str1xxxxxx_com.pdf
6. Method of connecting to network. Principle of operation.
When operating, the controller uses a buffer of 40 bytes maximum for each
command. While performing a command, it may receive next. Before receiving
the last byte of the second command, the first must be finished. If not, then
the second will be ignored.
When a command is sent to reprogram something, must be borne in mind,
that one byte programming take time approximately 4 milliseconds.
There are built-in protections for the pause between two bytes. The time
between two commands can be arbitrary. After receiving the first byte of the
command, the maximum time to the next byte must be less than 300 ms. If
Analog Input X
V/A
Analog
Rin=91k
R
s
h
=
5
00
GND