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Example: Making 2-Wire
Ohms Measurements by
Scanning
Example: Making 4-Wire
Ohms Measurements by
Scanning
Example: Making
Multiple Scans
Example: Making
Continuous Scans
Comments
38 Using the Relay Multiplexer Modules
Use the same setup shown in the first program example in this section,
except change the commands in lines 10 and 40 to the following:
10 OUTPUT 722;"TRIG EXT;OHM"
40 OUTPUT 70914;"SCAN:MODE RES"
This command, when used with
channel_list
commands, automatically closes the channels defined
SCAN <
>
in the channel list, and the AT and AT2 Tree Switches during scanning.
Use the
SCAN:MODE FRES
channels defined in the
measurement requires paired channel closure (e.g., channels 02 and 10),
which the command automatically performs. Change the commands in lines
10 and 40 to the following:
10 OUTPUT 722;"TRIG EXT;OHM"
40 OUTPUT 70914;"SCAN:MODE FRES"
This command, when used with the
channel_list
commands, automatically closes the channels defined
SCAN <
>
in the channel list and the AT and BT Tree Switches during scanning.
The
number
ARM:COUN <
the command to the first program example in this section, as follows:
OUTPUT 70914;"ARM:COUN 10"
OUTPUT 70914;"SCAN (@100:215)"
The
command selects continuous scanning cycles
INIT:CONT ON
(
disables continuous scanning cycles). Add the command
INIT:CONT OFF
to the first program example in this section, as follows:
OUTPUT 70914;"INIT:CONT ON"
OUTPUT 70914;"SCAN (@100:215)"
See Chapter 4 for more information on scanning.
Scanning Requirements of a Switchbox (in an Mainframe with an
Command Module). To scan modules in a switchbox, you must:
-- know the card numbers (see Chapter 1) of all the modules to be
scanned;
-- sequentially address the modules (e.g., Logical Address 112, 113,
114, etc.);
-- set lowest addressed module to a logical address that is a multiple of
8 (see the 75000 Series B Installation and Getting Started Guide, or
other appropriate manuals, for more information).
!Set multimeter to 2-wire ohms.
!Closes channel switches.
SCAN:PORT ABUS
command to automatically close the selected
channel_list
command. This type of
SCAN <
>
!Set multimeter to 4-wire ohms.
!Closes channel switches.
SCAN:PORT ABUS
command selects multiple scanning cycles. Add
>
!Enables 10 scanning cycles.
!Sets scan list.
!Enables continuous scanning
cycles.
!Sets scan list.
and
and
Chapter 3
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