CREATE TABLE table_43942 ("Fieldbus" TEXT, "Bus power" TEXT, "Cabling redundancy" TEXT, "Synchronisation" TEXT, "Sub millisecond cycle" TEXT)

What is the millisecond cycle for the Fieldbus?
SELECT "Sub millisecond cycle" FROM table_43942 WHERE "Fieldbus" = 'fieldbus'
SELECT "Sub millisecond cycle" FROM "table_43942" WHERE "Fieldbus" = 'fieldbus'