Advantech SNMP-1000-B1, User Manual

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SNMP-1000-B1 User’s Manual 42
4.3 Syntax of Command and Response
The format of command and response is shown as follows:
a.
Write command: w!!&xxx
b. Read command: r!!&
c. Response: [repeat received command]\n Response: xxx\n
Command:
w : write command
r : read command
!!: device code
&: device sub-code
xxx: value in ASCII code, it could be "Done" or "Invalid" in the response
from SNMP-1000-B1.
Examples:
1.
Write low limit of Fan 0 to "1000" rpm
EX.
Host computer side sends
"w1011000\r"
SNMP-1000-B1: responds
"w1011000\n Response: Done\n Command:"
2. Read low limit of Fan 0
EX.
Host computer side sends
"r101\r"
SNMP-1000-B1: responds
"r101\n Response: 1000\n Command:"
3. If input command is incorrect then SNMP-1000-B1 will response
invalid message.
EX.
Host computer side sends
"r905\r"
Here the sub-device code is over range.