Konica Minolta bizhub C550 - Manual (Page 219)

Specifying Utility mode parameters 3
C550 3-52
2
Touch [TWAIN Lock Time].
3
Press the [C] (clear) key to erase the value, and then use the keypad to
specify the desired length of time (between 30 and 300 seconds).
– If a value outside the allowable range is specified, the message “In-
put error” appears. Type a value within the allowable range.
4
Touch [OK].
The TWAIN lock time is set.