MKS GMW-25, Руководство по эксплуатации

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Operation
3-24 GMW-25
3.4 Remote Control Interface Communication
Protocol
Data is transferred to and from the CPU using a simple ASCII protocol
that functions with a standard terminal.
All ENI monitor commands are composed of three ASCII characters
followed by numbers where applicable and terminated by a carriage
return. All three command characters must be correct for a command
to be accepted. All characters sent to the GMW-25 Generator over the
ENI Monitor port are echoed by the generator. Thus, if the serial port
is being driven by a computer, the computer can verify that the
generator received the characters that were sent to it.
Commands containing numerical fields will only be accepted if the
numerical portion is in a specified range.
Upon receipt of a carriage return (0x0D), the controller returns a
carriage return and a line feed (0x0A) so that the terminal screen is
correctly formatted. In addition, an asterisk (*) is used to indicate that
the command has been accepted and executed. If an unrecognized
command is received, a question mark (?) and bell character (0x07)
are returned instead. The response is ordered as follows:
CR LF * or
CR LF BEL ?
The ENI Monitor always returns one of these two responses after
command execution. In addition, with the exception of the power up
messages, there are no unprompted responses.
The following commands give an example of the types of messages
that are available and their format:
HEL3 Causes help screen number 3 to print.
RFV Causes a 16-bit fault vector to be reported showing the
system health.
3.4.1 Space Characters
Commands sent to the generator may include space characters (0x20)
as desired. The generator will echo such characters back to the
sender, but will otherwise ignore them. Space characters are not
saved in the software's internal receive buffer.