The only permanent solution is to add "consoleblank=0"consoleblank=0 to the kernel command-line. You can view the value (which defaults to 600 seconds) at /sys/module/kernel/parameters/consoleblank in:
/sys/module/kernel/parameters/consoleblank
(note that the file is read-only). The only way to change the value of consoleblank is to reboot with the new kernel command-line option.