Extron Electronics MLC 104 Plus Series - Manual (Page 80)

SIS ™ Programming and Control, cont’d
MLC 104 Plus Series • SIS Programming and Control 4-16
PRELIMINAR
Y
Command/r
esponse table for SIS commands (continued
)
Command
ASCII (T
elnet
)
(host to MLC
)
URL Encoded (W
eb
)
(host to MLC
)
Response (MLC to host
)
Additional description
Digital I/O data port (dedicated Digital I/O ports
) configuration and use
N
An input voltage below 2.0 VDC is consider
ed to be logic low
. An input voltage above 2.8 VDC is consider
ed to be logic high. These thr
esholds ar
e not adjustable.
Set the input/output (I/O) mode
24
X22#
*
X4)
[
X22#
%2A
X4)
%5B
Iom
X22#
*
X4)]
Set the input/output mode (
X4)
) for a
specific port (
X22#
).
X22#
= port number
1 = Digital I/O port 1 2 = Digital I/O port 2 3 = Digital I/O port 3 X4)
= mode
0 = input (default) 1 = output 2 = input and pull-up r
esistor
3 = output and pull-up r
esistor
.
N
When set for input with pull
‑up r
esistor (
X4)
= 2
), the digital input can be trigger
ed by an external switch. When the
switch closes, the voltage dr
ops fr
om 5 V to 0 V
.
When set for output with pull
‑up r
esistor
, the MLC’
s digital I/O port can drive devices such as r
elays and LEDs.
See the diagrams in chapter 2 and the special application examples in chapter 5 for mor
e details.
V
iew the digital I/O mode
X22#
[
X22#
%5B
X4)]
Pulse the digital I/O state
14
X22#
*3*
X6#
]
X22#
%2A3%2A
X6#
%5D
Sio
X22#
*
X4#
]
Briefly
change the I/O state.
X6#
= Pulse time in 20 ms per unit. If this
parameter is missing or = 0, then pulse length = default (25 = 500 ms). 65535 (1310 s) = max. pulse time. X4#
= I/O state:
0 = of
f
1 = on
N
This and the following thr
ee commands ar
e valid only when the port is in output mode or in output with pull
‑up mode.
Otherwise the E14 err
or (invalid for this configuration) is r
eturned by the MLC.
Toggle the I/O state
14
X22#
*2]
X22#
%2A2%5D
Sio
X22#
*
X4#
]
Switch the input/output state fr
om on to of
f
or fr
om of
f to on.
Set the I/O state to on
14
X22#
*1]
X22#
%2A1%5D
Sio
X22#
*1
]
Set the I/O state to of
f 14
X22#
*0]
X22#
%2A0%5D
Sio
X22#
*0
]
V
iew the I/O state
X22#
]
X22#
%5D
X4#]