INFICON STM-2 USB Thin Film Rate/Thickness Monitor User Manual
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STM-2 Operating Manual
DATA . . . . . . . . . . . . . . . . . . . . . . . . Optional data
STX and carriage return characters are not
allowed in the data field.
To send a data byte valued as hexadecimal
02, send the protocol escape character
(hexadecimal 07) followed by zero
(hexadecimal 30).
To send a data byte valued at hexadecimal
0D, send the protocol escape character
(hexadecimal 07) followed by one
(hexadecimal 31).
To send a data value of hexadecimal 07,
send the protocol escape character followed
by two (hexadecimal 32).
The protocol escape character cannot be
sent as a single byte, but can only be sent as
the first byte of a pair, followed by an ASCII
0, 1, or 2.
If the protocol escape character is seen but is
not followed by an ASCII 0, 1, or 2, the
command is invalid and is ignored.
CKSUM1,2 . . . . . . . . . . . . . . . . . . . . Checksum characters for the message
This is the mod-256 checksum of the
command binary message data. The
checksum does not include STX and
carriage return, and it is calculated before
escape character byte stuffing (see
).
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