User`s manual

Relay Multiplexer Command Reference 59
CLOSe?
[ROUTe:]CLOSe? <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 closed or returns
0 if the channel is open.
Comments • Query is Software Readback: The [ROUTe:]CLOSe? command returns the
current software state of the channel specified. It does not account for relay
hardware failures.
Example Query Multiplexer Channel Closure
CLOS (@100,215)
100 closes channel 00 of multiplexer #1;
215 closes channel 15 of multiplexer #2.
CLOS? (@215)
Query channel 215
OPEN
[ROUTe:]OPEN <channel_list> opens the multiplexer channels specified in the
channel_list. The channel_list is in the form (@ccnn), (@ccnn,ccnn), or
(@ccnn:ccnn) where cc = card number (00–99) and nn = channel number (00–15).
Parameters
Comments • Opening Channels: To open:
-- a single channel, use
[ROUTe:]OPEN (@ccnn);
-- for multiple channels, use
[ROUTe:]OPEN (@ccnn,ccnn);
-- sequential channels, use
[ROUTe:]OPEN (@ccnn:ccnn);
-- a group of sequential channels, use
[ROUTe:]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:
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 00 of a card number 1 multiplexer module and
channel 15 of a card number 2 multiplexer module in a single switchbox.
OPEN (@100,215)
100 opens channel 00 of multiplexer #1;
215 opens channel 15 of multiplexer #2.
Parameter Name Parameter Type Range of Values
<
channel_list>
numeric cc00–cc15