Black Box 945 用户手册
How to Use Data Communications
14
WATLOW Series 945
Figure 7 -
XON/XOFF "?"
Command Example.
XON/XOFF "?"
Command Example.
XON/XOFF "?"
XON/XOFF "?" Command Example
You want to know the Alarm 1 Low (A1LO) value. The "?" uses a variation of the
message syntax shown just below. This protocol requires an ending carriage
return character.
message syntax shown just below. This protocol requires an ending carriage
return character.
"?" Command syntax with XON/XOFF Protocol:
? <space> Data.1 <CR>
? <space> Data.1 <CR>
Enter in ASCII:
? <space> A1LO <CR>
The hex string will be:
3F2041314C4F0D
? <space> A1LO <CR>
The hex string will be:
3F2041314C4F0D
The value of A1LO will be between rL (Range Low) and rH (Range High), say, 500.
Response from the Series 945:
<XOFF> <XON> <current value of A1LO> <CR>
<XOFF> <XON> <current value of A1LO> <CR>
The hex response string is:
13113530300D
13113530300D
ASCII
Characters
Characters
HEX
Value
Value
1
41
4C
31
Space
?
3F 20
A
L
CR
0D
4F
O
0
0
30
5
35
30
CR
0D
ASCII
Characters
Characters
HEX
Value
Value
<XOFF>
13
<XON>
11