: Go to the SETTING screen and set Parameter Write Enable (PWE) to 1 (this will trigger an alarm, which is normal).

The parameters are specifically categorized as Option Parameters for controllers like the Series 16i, 18i, and 21i . These parameters determine which software features and hardware capabilities are enabled on your machine. Key Insights on 9900 Parameters

Altering 9900 series parameters without authorization carries significant risk:

Most parameter changes must be performed while the machine is in Manual Data Input (MDI) mode.

If you have access to the original from the builder.

The 9900 parameters are typically formatted as (8 bits per parameter, labeled Bit 0 through Bit 7 from right to left):

Most 9900 series parameters are "bit-type" parameters. This means a single parameter number contains 8 individual binary switches (bits), labeled from 7 to 0 (reading left to right). Feature is disabled. 1: Feature is enabled. For example, a parameter screen might look like this:

You cannot simply type in a new value for a 9900-series parameter without preparation. Modifying these without a backup can lead to a "dead" machine.