83
NOTE
RS-485 retransmit baud-rate is automatically set to 115,200 bps if USB, LAN or optional
communication (i.e. IEEE or MODBUS TCP) is selected.
4.9
GEN Protocol (GEN series communication language)
GEN communication language is supported to provide compatibility to the legacy GENESYS
Programmable Power Supplies Series. To use the advanced functions of the power supply, refer to
SCPI language, section 4.12.
Recommended time delay between commands: 5mSec minimum.
NOTES
• The address (ADR n) command must return an ”OK” response before any other
command is accepted.
• GEN language is supported only in Serial communication interfaces (RS232, RS485 and
USB).
4.9.1 Data Format
Serial data format is 8 bit, one start bit and one stop bit.
No parity bit.
4.9.2 End of Message
The End of Message is the Carriage Return character (ASCII 13, 0x0D).
Power supply ignores the Line Feed (ASCII 10, 0x0A) character.
4.9.3 Command Repeat
The backslash character ”\” causes the last command to be repeated.
4.9.4 Checksum
The user may optionally add a checksum to the end of the command. The checksum is ”$” followed
by two hex characters. If a command or a query has the checksum, the response will also have
one. There is no CR between the command string and the ”$” sign. Example: STT?$3A,
STAT?$7B.
STT?$3A checksum is calculated as follows: S = 0x53, T = 0x54, T = 0x54, ? = 0x3F.
0x53 + 0x54 + 0x54 + 0x3F = 0x013A, checksum is the least significant byte – 0x3A.
STAT?$7B checksum is calculated as follows: S = 0x53, T = 0x54, A = 0x41, T = 0x54, ? = 0x3F.
0x53 + 0x54 + 0x41 + 0x54 + 0x3F = 0X017B, checksum is the least significant byte – 0x7B.
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