SBPC-21-PB CUSTOMER INSTRUCTION MANUAL
________________________________________________________________________________________________________________
12-20-2002
Figure Sheet 1-851-A
Page 29
6
S
PECIAL
C
ONTROL OF
F
IFE
N
ET
D
EVICES
• • • • • •
NOTE
: This section is intended to be used for special commands not available in the control matrix via
keypad emulation or for setup purposes.
CDP-01 Key Code Data Path
When a key is pressed on a FifeNet CDP-01, the key code goes through many steps before any action
is taken. The keys are scanned and the key is detected, but the key is not acted upon yet. Instead,
the key is buffered until the FifeNet Master polls the CDP-01 with a command that asks, “What keys
are pressed on your panel?” The CDP-01 responds with the key code representing which key (or
keys) are currently pressed. Normally, the FifeNet Master then issues a command back to the CDP-01
with the key code and a command that tells the CDP-01 which keys are pressed. Now that the
CDP-01 has received the command from the FifeNet Master telling it that a key has been pressed, it
will act on that key. (This is why a FifeNet CDP-01 keypad does not work when the network is down.)
Figure 6-1: CDP-01 Key Code Data Path
By skipping steps 1 and 2 in the sequence above, and injecting key codes/commands into the
command stream for the CDP-01, the SBPC-21-PB can simulate keys being pressed on the CDP-01’s
local panel. This provides the ability to make a fully functional remote control over the network.
1)
What keys are pressed?
2)
My
AUTO
key is pressed.
3)
Your
AUTO
key is pressed.
FifeNet Master