Opening Relays - Racal Instruments 1256E Manual

1256E User Manual

Opening Relays

Racal Instruments © 2002
0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0
Command:
CLOSE? (@7(0))
Reply:
0
Command:
CLOSE? (@7(3, 20, 31))
Reply:
1 1 1
The OPEN command may be used to open channels. To say a
channel is open means:
a. The input of the channel is disconnected to the output
(Single-Pole Single Throw)
b. The input of the channel is disconnected from the "normally
open" output and connected to the "normally closed" output
(Single-Pole Double-Throw).
The syntax for the "OPEN" command is:
[:ROUTe]
:OPEN <channel list>
The format for a "<channel list>" is described in the previous
paragraphs of this section of the manual.
The OPEN? command may be used to query the present state of
the relays in the system. This command returns a reply of a
sequence of "0" and "1", each of which are separated by a single
ASCII space character. The value of the reply is "1" if the
corresponding relay is opened, or "0" if the corresponding relay is
closed. Note that this is the opposite state from the CLOSE?
query.
SCPI Command Basics 5-39