Specifications

OPEN [ROUTe:]OPEN <channel_list> opens multiplexer channels specified in
the channel_list. 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).
Parameters
Parameter Name Parameter Type Range of Values
channel_list
Numeric cc00 - cc15
Comments • Opening Channels - relay and FET: To open:
– a single channel, use OPEN (@ccnn);
– for multiple channels, use OPEN (@ccnn,ccnn);
– sequential channels, use OPEN (@ccnn:ccnn);
– a group of sequential channels, use OPEN (@ccnn:ccnn,ccnn:ccnn);
– or any combination.
Opening order for multiple channels with a single command is not
guaranteed.
• Opening the AT, BT, AT2, and RT Tree Switches - relay
multiplexers: Use channel numbers 90, 91, 92, and 93 to open the
AT, BT, AT2, and RT tree switches, respectively.
• Related Commands: [ROUTe:]CLOSe, [ROUTe:]OPEN?
• *RST Condition: All multiplexer channels are open.
Example Opening Multiplexer Channels
This example opens channel 0 of switchbox multiplexer card number 1.
OPEN (@100) 100 opens channel 0 of multiplexer
#1.
OPEN? [ROUTe:]OPEN? <channel_list> returns the current state of the
channel(s) queried. The channel_list is in the form (
@ccnn). The
command returns 1 if the channel is open or returns 0 if the channel is
closed.
Comments • Query is Software Readback: The [ROUTe:]OPEN? command
returns the current software state of the channel specified. It does
not account for relay hardware failures.
Example Query Multiplexer Channel Open State
OPEN (@100) 100 opens channel 0 of multiplexer
#1.
OPEN? (@100) Query channel 0.
82 Strain Gage Multiplexer Command Reference Chapter 5
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