Sierra Video 507125 - Manual (Page 12)

Sierra Video Systems SmartLinx Bus Adapter busadap.doc
12
CmdChar Direction Description
C
(Connect)
Poller
→ → → →
All A connection to some SmartLinx device has been established by the poller.
D
(Disconnect)
Poller
→ → → →
All The poller has lost the connection to some SmartLinx device. Any mutexes that
have been allocated by the device are automatically released.
F
(FrameID)
Poller
→ → → →
All Every 200 ms the poller sends this message to all devices to allow those in a
particular frame slot to use the frame ID lines to determine which frame they are in.
H
(High Speed)
Any
→ → → →
Poller A SmartLinx device requests a temporary change in the EIA-485 bus data rate. The
poller sends an “h“ message in response.
h
(High Speed)
Poller → → → → Any/All Sent in response to receiving an “H“ message. If the “H“ message request is
denied, this message is sent only to the sender of the “H“ message. Otherwise, it is
sent to all devices to announces the beginning of a temporary change in the EIA-485
bus data rate.
L
(Loopback)
Any → → → → Poller Loopback send diagnostic message, poller sends data back to sender using “l”
message.
l
(Loopback)
Poller
→ → → →
Any Loopback reply diagnostic message, sent in response to receiving an “L“ message.
N
(Name)
Any
→ → → →
Poller Queries for the poller’s module name. The poller sends an “n” message in
response.
n
(Name)
Poller
→ → → →
Any The poller reports its name in response to receiving an “N” message. The name is
fixed as “Poller”.
P
(Poll Params)
Any
→ → → →
Poller Changes a SmartLinx module’s polling parameters, or queries for them. The poller
sends a “p” message in response.
p
(Poll Params)
Poller
→ → → →
Any The poller reports a SmartLinx module’s polling parameters in response to receiving
a “P” message.
Q
(Query)
Any → → → → Poller Queries for which devices are connected. The poller sends a “q” message in
response.
q
(Query)
Poller → → → → Any The poller reports which devices are currently connected in response to receiving a
“Q” message.
R
(Reset)
Any
→ → → →
Poller The poller and its Bus Adapter reset themselves as if just powered up after receiving
this message.
r
(Reset)
Poller
→ → → →
All The poller sends this message at startup to announce that it has just started up.
W
(Which)
Any
→ → → →
Poller Request for the poller to send a “w” message reporting the message bytes it
understands and/or sends.
w
(Which)
Poller
→ → → →
Any The poller reports the message bytes it understands and/or sends, in
response to receiving a “W” message.
X
(eXclusion)
Any → → → → Poller Request for the poller to allocate or release a mutual exclusion semaphore. The
poller sends an “x” message in response.
x
(eXclusion)
Poller → → → → Any/All The poller reports a change in ownership of a mutual exclusion semaphore in
response to receiving an “X” message. If the “X” message request failed, this
message is sent to the sender of the “X” message. If ownership of a mutal
exclusion semaphore actually changed, this message is sent to all devices.
Table 5: Universal Messages Understood or Sent by Poller-Enabled Bus Adapters at the Poller Address
The End