Bruker BVT3000 - 4.8.7 P2 (Port 2 for test only)

BVT3000 Version 003 BRUKER 43 (67)
Authorised functions
P2 (Port 2 for test only) 4.8.7
The power level applied to the liquid nitrogen evaporator is set by an analog con-
trol signal coming from an 8 bit DAC (Digital to Analog Converter). Port 2 provides
the bits for liquid nitrogen control DAC:
Table 4.7. Port2 definition
Write
Syntax: EOT0000STXP2 AB ETX BCC
Response
:ACK
Description
: Allows direct write access to port 2.
Rules
: The first character represents the state of port 2 bits 4 to 7. The se-
cond character represents the state of the bits 0 to 3. The characters are hexade-
cimal.
Read
Syntax: EOT0000P2 ENQ
Response
:STXP2 >ABCDETXBCC
Description
: Allows direct read access to port 2.
Rules
: A and B are always «0». The third character represents the state of
port 2 bits 4 to 7 while the fourth character represents the state of the bits 0 to 3.
All the characters are hexadecimal.
BIT NAME FUNCTION
0 1LN2 DAC bit 0
1 2LN2 DAC bit 1
2 3LN2 DAC bit 2
3 4LN2 DAC bit 3
4 5LN2 DAC bit 4
5 6LN2 DAC bit 5
6 7LN2 DAC bit 6
7 8LN2 DAC bit 7