Specifications

SCAN [ROUTe:]SCAN <channel_list> defines the switchbox channels to be
scanned. The channel_list is in the form (
@ccnn), (@ccnn,ccnn),
(
@ccnn:ccnn) or (@ccnn:ccnn,ccnn:ccnn) where cc = card number (00-99)
and
nn = channel number (00-15 - includes internal (diagnostic) channels).
Parameters
Parameter Name Parameter Type Range of Values
channel_list
Numeric cc00 - cc15
Comments • Channel List - relay and FET multiplexers: Valid scanning lists
are:
– a single channel, use (@ccnn);
– for multiple channels, use (@ccnn,ccnn);
– sequential channels, use (@ccnn:ccnn);
– a group of sequential channels, use (@ccnn:ccnn,ccnn:ccnn);
– or any combination.
• Defining the Channel List: When executing [ROUTe:]SCAN, the
channel list is checked for valid card and channel numbers. An error
is generated for an invalid channel list.
• Downloading a FET Multiplexer Scanning List: When
TRIG:SOUR DBUS or TRIG:SOUR IMM is set, the channel_list for
the
SCAN command is automatically downloaded into RAM on the
FET multiplexer. The channels are advanced via the digital bus, and
no direct intervention by the mainframe CPU is required. If the
switchbox instrument contains FET and relay multiplexers, the scan
list is not "downloaded", but is still scanned.
• Scanning Operation: With a valid channel list, INITiate[:IMMediate]
starts the scanning cycle and closes the first channel in the channel list.
Successive triggers from the source specified by
TRIGger:SOURce
advances the scan through the channel list.
• Stopping Scan: See the ABORt command.
• Closing the AT, BT, and AT2 Tree Switches - relay multiplexers:
See the
[ROUTe:]SCAN:PORT ABUS command.
• Related Commands: TRIGger, TRIGger:SOURce
• *RST Condition: All channels open.
Chapter 5 Strain Gage Multiplexer Command Reference 83
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