Hoffer Flow Controls CAT1 Series, Руководство пользователя

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Appendix B
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Communications 15
HP-310
Appendix B – Communications
Message Format And Timeout
Communication messages consist of a string of ASCII characters
terminated by a carriage return character. The maximum message
length received by CAT1 is 20 characters, including the carriage return.
The CAT1 will transmit no more than 35 characters before transmitting
a carriage return.
If a message longer than A 20 characters command is sent, the
instrument responds with
“Command Sequence is Too Long!<NL>”
If an unrecognized or invalid command is sent, the instrument responds
with
“Invalid Command! <NL>”
The sending unit RS232C serial port configuration must be configured
as follows:
Baud rate: 2400
Data bits: 8
Parity: none
Stop bits: 1
Handshaking: none
The CAT1 echoes all received messages and then transmits a response
string terminated with a carriage return. If the sending unit takes longer
than one minute to send a message, the CAT1 aborts the message by
clearing the receive buffer.
If the sending unit (PC or other such device) wishes to change a setting
on the CAT1, the sending unit shall follow the command with an equal
sign (“=”) with the data following immediately after the equal sign.
The carriage return terminates the message.
Any CAT1 response that sends data back to the sending unit shall have
an equal sign (“=”) followed by the data. Space is allowed between the
equal sign and the data on the return message, but the total message
length is limited to 35 characters.