28 (67) BRUKER BVT3000 Version 003
Remote interface control
Eeprom:
256 bytes for manufacturing informations storage (BBIS informations).
Interface:
• Serial link to EUROTHERM controller:
9600 bauds, 1 start bit, even parity, 1 stop bit and three link wires. The baudrate
can be changed through the software using the "CO" command.
• Serial link to host computer:
9600 bauds,1 start bit, even parity, 1 stop bit and three wires link.
Isolation
:
Optocouplers 2500 volt isolation between digital interface and power section.
Power supply:
+5volt,I<1ampère.
Commands and communication protocol 4.3
All commands for the Eurotherm controller cross over the interface. The micro-
controller decodes each received command and then decides for what componed
the command is intended (either for the interface itself or the Eurotherm control-
ler). A command that is not an interface command is automatically transferred to
the Eurotherm controller. If the command is processed by the Eurotherm, the an-
swer 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 ex-
changed between host computer and BVT3000.
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
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