Sierra Video Manzanita 44VSCP - Manual (Page 8)

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Sierra Video Systems • P.O. Box 2462 • Grass Valley, CA 95945 • (530) 478-1000 • Fax (530) 478-1105
MODEL 44 INSTRUCTION MANUAL
Syntax Example Description
I
I Capabilities inquiry.
S S Status inquiry.
U {0 | 1} U0 Update request on/
off.
X out, in, lvl X12,9,2
Connect crosspoint.
Z in, in... Z13,12,8 Connect AFV.
“I”: Capabilities Inquiry
The command “I” requests that capability infor-
mation be returned to the host. The information is
sent as a string of characters. The first characters
are a space followed by “I”, the next characters
are the command letters that are implemented as
commands, and the last character is “~” (tilde).
For example, the command:
*I!
might return the following string:
*IILSX~ OK !
indicating that the switcher supports the “I”, “L”,
“S”, and “X” commands from the host.
“S”: Status Inquiry
The command “S” requests that status information
be returned to the host. The status information is
sent as a string of L x O substrings, where L =
number of levels and O = number of outputs.
Each level/output combination generates a single
substring of status. Thus, a 2-level 16 output
router would generate 2x16 = 32 substrings of
status command output. The length of each
substring depends on the size of the particular
switcher involved. Larger switchers use bigger
numbers for inputs, outputs, and levels.
The first substring of status is for level 1 output 2,
etc. (However, each substring contains the level
and output numbers, so the sequence in which the
data is sent is not important.) The first characters
of each substring are a space followed by “X”,
then the output number, a comma character, the
input number connected to the output (or 0 if no
connection exists), another comma, and finally the
level number at which the input-output pair is
connected.
For example, the command:
*S!
might have the following two substrings at the
beginning of its response:
* X1,3, 1 X2, 2, 1!
This indicates that output 1 is connected to input 3
and that output 2 is connected to input 2.
“U” Update Request
The command “U” turns on or off the automatic
sending of updates. The command letter must be
followed by either a “1” (on) or “0” (off) to specify
the new update state.
Updates are automatic messages sent to the host
whenever a matrix crosspoint is changed by
something other than a host command (e.g. by a
keypad or some other remote controlling device).
An update message is identical to substring sent
by the “S” command described above, and is
preceded by a leader character and followed by a
trailer character and CR character.
For example, the command:
*U1!
turns on automatic updates. When a crosspoint is
changed, the following message might be received:
*X1, 05 ,1!
indicating that output 1 is now connected to input
5 on level 1. Note that all-level (AFV) switches
will generate multiple “X” substring responses,
one for each level. Updates can be sent any time a