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1260-21 User Manual
Racal Instruments
©
2005
Module Operation 3-3
Operating In
Message-Based
Mode
Channel
Descriptors For
The 1260-21
The standard 1260-01T commands are used to operate the 1260-
21 module. These commands are described in the 1260-01T
User’s Manual.
Table 2-1
shows the channel commands for the
1260-21.
Each 1260-01T relay command uses a
channel descriptor
to select
the channel(s) of interest. The syntax for a channel descriptor is
the same for all 1260 series modules. In general, the following
syntax is used to select a single channel:
(@ <module address> ( <channel> ) )
Where:
<module address>
is the address of the 1260-21 module, as set
by the logical address DIP switch SW1 on
the 1260-21.
The module address is a number from 1 through 12, inclusive.
Set the module addresses for the 1260-21 and other 1260-Series
modules so that no address is used by more than one 1260-Series
module. For instructions on setting module addresses for a
1260-Series module, see the label on the side panel of the
module.
<channel range> ::= <channel number>:<channel number>|
<channel number>,<channel number>|
<channel number>
<Channel number> ::= <Mux><channel>
<Mux> ::= 0 to 11 for 1x2 switches
<channel> ::= 0 or 1 (open or closed) for 1x2 switches
The default state of each 1x2 multiplexer with no relays energized
is for channel 0 (of each multiplexer) to be connected to the
common.
The following examples illustrate the use of the channel