PT200MI instruction manual 25
8.2.5 SETTING COMPARATOR SETPOINTS USING RS232/RS485 (requires RS232 or RS485 option
installed)
Set-point setting can be conveniently performed by using RS232/RS485 during normal weighing mode.
Refer to the section on RS232/RS485 for connection diagrams.
From the RS232 port, input a command “SET<CR><LF>”, “CAL 1<CR><LF>”, the display will show
“SET” throughout the calibration setting mode.
From the RS485 port, input a command “<ENQ>IDXX<CR><LF>”, indicator responds
“<ACK>XX<CR><LF>”, then input a command “SET<CR><LF>”, the display will show “SET”. XX is
the indicator ID set in function F14 above.
The sequence of set-point setting via serial port involves sending a series of parameters followed by
<CR><LF> and receiving a subsequent response from the PT200MI. If an invalid parameter is sent
the PT200MI responds NO? <CR><LF> and a correct entry must be made. When the correct
parameter has been sent the PT200MI send N<CR><LF> to move to the next stage.
Note that commands are case sensitive.
Note that the factory setting for INPUT1 is FUNC and INPUT1 must be connected to COM to
enter the setting mode.
Note: The set-point value is entered as a number without decimal point and must be a multiple
of the indicator step size. i.e. if the indicator maximum capacity is 100.00 and the step is 0.05
and the comparison load is 75.15 enter 7515 for num.
Transmit Response
(RS485)<ENQ>IDXX<CR><LF>
(RS232/RS485)FUNC<CR><LF>
(RS485)<ACK>XX<CR><LF>
(RS232/RS485) S-HH [num]<CR><LF>
PT200 displays “FUNC”
Step 1: HIGH HIGH set-point setting (HH)
Transmit Response
[num]<CR><LF> S-HH [num]<CR><LF>
Options for [num]
The value of the required comparison weight.
N<CR><LF> to move to the next setting.
R<CR><LF> to return to normal weighing.
S-HI [NUM]<CF><LF>
YES
Step 2: HIGH set-point setting (HI)
Transmit Response
[num]<CR><LF> S-HI [num]<CR><LF>
Options for [num]
The value of the required comparison weight.
N<CR><LF> to move to the next setting.
R<CR><LF> to return to normal weighing.
S-LO [NUM]<CF><LF>
YES
Step 3: LOW set-point setting (LO)
Transmit Response
[num]<CR><LF> S-LO [num]<CR><LF>
Options for [num]
The value of the required comparison weight.
N<CR><LF> to move to the next setting.
R<CR><LF> to return to normal weighing.
S-LL [NUM]<CF><LF>
YES
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