Bruker BioSpin NMR BVT3200, Техническое руководство

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26 (55) BRUKER BIOSPIN Technical Manual Version 002
Interface :
•
Serial link to Eurotherm 2416 controller :
9600 bauds,1 start bit, even parity, 1 stop bit and three wires link. Baudrate
can be changed by software with the «CO» command.
•
Serial link to host computer :
9600 bauds,1 start bit, even parity, 1 stop bit and three wires link.
Isolation :
Optocouplers 2500V isolation between digital interface and power section.
Power supply :
V = +5 Volt, I < 1 Ampere.
Commands and communication protocol 4.3
All commands for the Eurotherm controller cross over the interface. The micro-
controller looks at each received command and decides then for whom the
command is intended (either for the interface itself or the Eurotherm controller). A
command that is not an interface command is automatically transferred to the
Eurotherm controller. If the command is processed by the Eurotherm, the
controller answer is returned to the host computer via the interface.
Control characters 4.4
Six non printing ASCII characters are used to control the messages that are
exchanged between host computer and BVT3200.
Table 4.1. Control characters
NAME HEX FUNCTION
STX 02 Start of text
ETX 03 End of text
EOT 04 End of transmission
ENQ 05 Enquiry
ACK 06 Acknowledge
NACK 15 Negative acknowledge