3-5
SW USB Series • Operation
PRELIMINARY
SIS
Command
SW USB function SW USB response to host
!
Performed and passed through
Chn
X!
]
^
Performed, not passed through
Usb
X!
]
E
(any)
Performed, not passed through See the SIS command table.
X
Performed, not passed through
X#
]
N
Performed, not passed through
60-95n-01
]
Q
Performed, not passed through
n.nn
]
*Q
Performed, not passed through
n.nn.nnnn
]
I
Performed, not passed through
Chn
X!
•InACT
X$
OutACT
X$
]
0V – 100V
Passed through, not performed*
CMD
]
&
Passed through, not performed*
CMD
]
%
Passed through, not performed*
CMD
]
1B, 0B
Passed through, not performed*
CMD
]
1M, 0M
Passed through, not performed*
CMD
]
1Z, 0Z
Passed through, not performed*
CMD
]
$
Passed through, not performed*
CMD
]
* For explanations of commands that are passed through to the A/V switcher and
not performed by the SW USB, refer to your A/V switcher’s user’s manual.
Example: When a control system issues an SIS input selection command of 1!
(Select input 1), 2! (Select input 2), 3! (Select input 3), or 4! (Select input 4), the SW
USB switches to the corresponding input. In addition, the SW USB passes the SIS
input selection command through the RS-232 Pass Thru port, causing the same
input to be selected on the A/V switcher.
Commands that cannot be passed through
The following SIS commands cannot be passed through to the A/V switcher:
• Information requests: View part number (N), Request information (I), and
Query firmware version (Q)
• Change loop mode (
E
nLOOP)
• Upload firmware (
E
Upload)
See the “Command/response Table for SIS Commands” in chapter 4 for
explanations of SIS commands that are performed by the SW USB.
Sending commands to an A/V switcher using contact closure
In Loop 0 mode, you can select an input on the SW USB by shorting the equivalent
pin on the Contact port to ground (either by pressing a button on a connected
contact closure device or by connecting a jumper between pin 1, 2, 3, or 4 and
_
[ground]). Shorting the pin to ground issues an input selection command to the
SW USB, which passes an SIS input selection command through its RS-232 Pass
Thru port to the A/V switcher. The switcher then switches to the corresponding
input.
Example: If you want to select input 1 on the A/V switcher, short pin 1 to ground
on the SW USB Contact port. The SW USB switches to input 1 and, simultaneously,
the RS-232 Pass Thru port passes the SIS command 1! to the A/V switcher, which
also switches to input 1.
(19 Seiten)
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