25
The checksum is automatically calculated, and it is sent with the delimiter (ETX)
^B 1 3 4 0 D 8 ^C
Delimiter ETX (03H)
Checksum
When the command finishes normally, it responds as follows.
In the case of Main setting value 850 , Program pattern 3, Step 4.
^F 1 3 4 0 0 3 5 2 0 E ^C
Delimiter ETX (03H)
Checksum
Setting
value
[Main setting value 850 ]
Data
item
Command
type
Sub address
Address: 20H
Header: ACK (06H)
[Acknowledgement]
Check if the display is as follows.
^B P13400352DE ^ C
^B 1340D8^C
----------------------------------------------------------------------------------------------------------------------------------
^F E0^C
^F 134003520E^C
(8) The communication test can be executed for other command in the same way.
7.3 Notice when inputting the command
•
All commands are composed of ASCII codes.
•
Data
Positive number (+): Convert to hexadecimal figure.
(Example) Main setting value 1000 in Fixed value control
1000
03E8H
Negative number (-): Convert to hexadecimal figure.
(Example) Main setting value -10 in Fixed value control
-10
FFF6H
Decimal point: Convert to hexadecimal figure, ignoring the decimal point.
(Example) Control output (OUT1) proportional band 2.5%
25
0019H
•
If power failure occurs during communication, the data cannot be guaranteed.
•
Control code
Because the code cannot be indicated on the CRT display, the control code is indicated with the letters
“^” and values to which 40H of bias are added.
.
Control code
CRT display
Key operation
STX (02H)
^B (“^”) and 02H + 40H”)
Press the B key while holding down the CTRL key.
ETX (03H)
^C (“^”) and 03H + 40H”)
Press the C key while holding down the CTRL key.
ACK (06H)
^F (“^”) and 06H + 40H”)
Press the F key while holding down the CTRL key.
NAK (15H)
^U (“^”) and 15H + 40H”)
Press the U key while holding down the CTRL key.
