User`s guide

Remarks
If you specify a value of "0", no timeout is set; the instrument will wait
indefinitely and will not send any keepalive probes to the client.
For the <seconds> parameter, you can substitute MIN or MAX for a
numeric value. MIN selects the smallest value accepted; MAX selects the
largest value accepted.
The timeout is stored in non-volatile memory, and does not change when
power has been off, after a Factory Reset (*RST command), or after an
Instrument Preset (SYSTem:PRESet command).