Watlow Series 942 Data Communications - Manual (Page 17)

How to Use Data Communications
17
WATLOW Series 942
Figure 9 -
ANSI X3.28 "?"
Command Example.
ANSI X3.28 "?"
ANSI X3.28 "?" Command Example
You need to know the Alarm 1 Low value (A1LO). The "?" uses a variation of
the message syntax shown just below. This syntax requires the protocol
start of text and end of text characters.
"?" Command syntax with ANSI X3.28 Protocol:
?
Enter in ASCII:
?
The hex string will be:
023F2041314C4F03
First response from the Series 942:
The hex response string is:
06
Your computer's confirming response:
The response hex string is:
04
Second response from the Series 942:
The hex string is:
023530302003
Your computer's next response:
or < NAK> (if the message needs to be repeated).
The hex string is:
06 or 15
Final response from the Series 942:
The hex string is:
04
Response from the Series 942:
The hex response string is:
06
• You'll find the the complete list of "=" Command arguments (parameters and
value limits) in Table 5, Pages 19 - 21.
5
0
ASCII
Characters
HEX
Value 20
0
0
<
ASCII
Characters
HEX
Value
1
41 4C 31
Space
?
3F 20
A
L
02 03
Optional
Carriage
Return
O
4F