Section 5:
Key Definitions
Page 19
Bit Status
In this configuration the switch essentially becomes a Bit Set field without text but with the
additional feature that it can operate in three different a modes.
The User Key configuration window is shown below. In these examples the F1 key will be configured to control the
Drive Enable/Disable flag in the Ultra Drive. The Host Reference Help document identifies this variable as a single
byte in length with only the least significant bit assigned, therefore, the Mask Value has the least significant bit set.
Example 1:
Assume Data Value least significant bit = 1, Momentary option selected.
When the F1 key is pressed the 2800 will write the value “1" to the Drive. This is the enabled
state. When the key is release no action will be taken.
Example 2:
Assume Data Value least significant bit = 0, Momentary option selected.
When the F1 key is pressed the 2800 will write the value “0" to the Drive. This is the disabled
state. When the key is release no action will be taken.
Example 3:
Assume Data Value least significant bit = 1, Maintained option selected.
When the F1 key is pressed the 2800 will read the current value of this variable from the Drive,
compliment the least significant bit the write the result to the Drive. When the key is release no
action will be taken. The switch functions as a push-on / push-off selector switch.
Remember, each User Key may be configured differently on each screen created!
PM2800U3K Revision 4
