Keithley 7037, Инструкция по эксплуатации

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Operation
5-5
Closing and opening channels
NOTE
This procedure applies to relay channels
(channels 1!1 through 1!30) and digital
I/O output channels (1!31 through 1!40).
Digital input channels are read only.
A channel is closed (turned on) from the front panel by sim-
ply keying in the channel assignment and pressing CLOSE.
For example, to close channel 18 of a card installed in slot 2,
key in the following channel list and press CLOSE:
SELECT CHANNELS 2!18
The above closed channel can be opened (turned off) by
pressing OPEN or OPEN ALL. The OPEN key opens only
the channels specified in the channel list, and OPEN ALL
opens all channels.
NOTE
For the Model 7002, you can use the light
pen to open and close channels.
The following display is an example of a channel list that
consists of several channels:
SELECT CHANNELS 2!1, 2!3, 2!22-
2!25
Notice that channel entries are separated by commas (,). A
comma is inserted by pressing ENTER or the right cursor
key (
©
). The channel range is specified by using the hyphen
(-) key to separate the range limits. Pressing CLOSE will
close all the channels specified in the channel list. Pressing
OPEN (or OPEN ALL) will open the channels.
Channel patterns can also be used in a channel list. This
allows you to control specific bit patterns for logic circuits.
Example:
SELECT CHANNELS 2!1, M1
Pressing CLOSE will turn on channel 2!1 and the channels
that make up channel pattern M1. Refer to the instruction
manual for the mainframe and for information on definin
channel patterns.
Scanning channels
Channels are scanned by creating a scan list and configurin
the Model 7001/7002 to perform a scan. The scan list is cre-
ated in the same manner as a channel list. (See the previous
Closing and opening channels paragraph.) However, the scan
list is specified from the SCAN CHANNELS display mode.
(The SCAN LIST key toggles between the channel list and
scan list.) The following shows an example of a scan list:
SCAN CHANNELS 2!1, 2!3, 2!1-2!5
When a scan is performed, the channels specified in the scan
list will be scanned in the order that they are presented in the
scan list.
Channel patterns can also be used in a scan list. This allows
you to control specific bit patterns for logic circuits.
Example:
SCAN CHANNELS M1, M2, M3, M4
When M1 is scanned, the channels that make up channel pat-
tern M1 will turn on. When M2 is scanned, the M1 channels
will turn off and the channels that make up M2 will turn on.
M3 and M4 are scanned in a similar manner. Refer to the
instruction manual for the mainframe for information on
defining channel patterns
A manual scan can be performed by using the RESET
default conditions of the Model 7001/7002. RESET is
selected from the SAVESETUP menu of the main MENU.
When RESET is performed, the mainframe is configured for
an infinite number of manual scans. The first press of STEP
takes the mainframe out of the idle state. The next press of
STEP will close the first channel specified in the scan list.
Each subsequent press of STEP will select the next channel
in the scan list.