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Technical Information
Where:
<STX> (Start of transmission) = 0x02
<ADDR> (Unit address) = when you select the RS232 communication, this field
is not handled and the controller always answers with its address stored in
EEPROM
<ADDR> (Unit address) = 0x80 + device number (0 to 31) (for RS485)
<WIN> (Window) = a string of 3 numeric indicating the window number (from
'000' to '999'); for the meaning of each window, see the relevant paragraph.
<COM> (Command) = 0x30 to read the window, 0x31 to write in the window
<DATA> = an alphanumeric ASCII string with the data to be written in the
window. In the case of a read command, this field is not present.
The field length varies according to the data type, as shown in
the following table:
Table 9
Data Type
Logic (L)
Numeric (N)
Alphanumeric (A)
<ETX> (End of transmission) = 0x03;
<CRC> = XOR of all characters following <STX> and including the <ETX>
terminator. The value is hexadecimal coded and represented by two ASCII
characters.
The SLAVE addressed responds with an ANSWER whose structure depends on the
MESSAGE type.
When the MESSAGE is a read command, the SLAVE responds transmitting a string
with the same structure as the MESSAGE.
Agilent IPCMini Ion Pump Controller User Manual
Field Length Max
Valid Characters
1
'0' = OFF
'1' = ON
6
'-', '.', '0' . . . '9' right justified with '0'
48
From blank to '_' (ASCII)
197
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