41
6-4. Communication interface protocol
The address (ADR n: refer to
"6-6-2. Initialization control commands"
) command must return an “OK” response
before any other commands are accepted.
6-4-1. Data format
Serial data format is 8 bit, one start bit and one stop bit. No parity bit.
6-4-2. Addressing
The Address is sent separately from the command.
◆
Refer to
"6-6-2. Initialization control commands"
.
6-4-3. End of Message
The end of message is the Carriage Return character (ASCII 13).
The power supply ignores the Line Feed (ASCII 10) character.
6-4-4. Checksum
The user may optionally add a checksum to the end of the command. The checksum is "$" followed by two hex
characters. If a command or a query has checksum, the response will also have one.
There is no CR between the command string and the "$" sign.
Example: STT?$3A
STAT?$7B
6-4-5. Acknowledge
The power supply acknowledges received command by returning message ( "OK" or other). If an error is detected,
the power supply will return an error message. The rules of checksum apply also to the acknowledge.
And in rare cases, the power supply can not respond because of losing any word from PC. For the case that power
supply can not respond within 200ms, send same command again with 200ms interval. This 200ms is recommended
interval between command to next command. This power supply does not have "Time-out" function.
For the case that power supply fails to receive "correct command", this incorrect command is still in buffer.
To refresh this buffer, needs to send same command repeatedly. Then power supply should send error message
( "C03" or other ) and this shows buffer is refreshed.
◆
Refer to
.
6-4-6. Backspace
The backspace character (ASCII 8) clears the last character sent to the power supply.
Summary of Contents for PU100-15
Page 10: ......
