DNF Controls ST400 VTR/DDR Controller

Description

DNF Controls ST400 VTR/DDR Controller
*No Power Adapter*
The ST400 will operate as an event driven device, transmitting information to the External Control System (ECS) when a change is detected. The ST400 will automatically detect and decode changes in the state of its 46 keys. It will return the state of all keys on the keyboard any time there is a change detected. The state of the keyboard is returned as 12 bytes, 6 bytes for Key Change bitmap (each key is represented by a bit) and 6 bytes for Key State bitmap of the key (each key is represented by a bit). If a bit is set in the Key Change Bitmap – the corresponding key’s state was changed. If a bit is cleared in the Key Change Bitmap, the corresponding key’s state was not changed. If a bit in the Key State bitmap is set – the corresponding key is pressed. If the bit is cleared, the corresponding key is released.
EOU
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