Watlow Series 734 Data Communications - Manual (Page 15)

15
WATLOW Series 733/734 How to Use Data Communications
ANSI X3.28 "="
Figure 8 -
ANSI X3.28 "="
Command Example.
1 0 0 4
<DLE>
<EOT>
ASCII
Characters
HEX Value
ASCII
Character
HEX
Value
1
Space
5
0
0
41 4C 31 20 35 30 30
<Space>
=
3D 20
A
L
<STX>
<ETX>
02 03
Optional
Carriage
Return
4F
O
Stopping Communications in ANSI X3.28 Protocol
The master device, your computer, must end communications with Device #4 by
using Data Link Escape (DLE) and End of Transmission (EOT) characters.
Enter in ASCII: <DLE> <EOT>
Response from the 733/734:
None
ANSI X3.28 "=" Command Example
The "=" Command sets a specific 733/734 prompt to a specific value. The general
command syntax applies to all commands. The definition and number of argu-
ments depends on the command itself. See Table 5, Pages 17.
In this example, you want to change the Alarm 1 Low value to 500°. Here, the "="
command will do the job.
'"=" command Syntax with ANSI X3.28 Protocol:
<STX> = <space> data.1 <space> data.2 <ETX>
With the "=" command, data.1 is the Series 733/734 prompt, in this case Alarm 1
Low , A1LO. Data.2 is the value you want to set for that prompt, in this example,
500.
Enter in ASCII:
<STX> = <space> A1LO <space> 500 <optional carriage return> <ETX>
The hex string is:
023D2041314C4F2035303003