AMETEK BPS Series Programming Manual - Manual (Page 151)

BPS / MX / RS Series SCPI Programming Manual AMETEK Programmable Power
Manual P/N 7003-961 Rev. AA 151
6.4.3 List Transients
List mode lets you generate complex sequences of output changes with rapid, precise
timing, which may be synchronized with internal or external signals. Each function that can
participate in output transients can also have an associated list of values that specify its
output at each list point.
You can program up to 32 settings (or points) in the list, the time interval (dwell) that each
setting is maintained, the number of times each data point is repeated, the number of times
that the list will be executed, and how the settings change in response to triggers.
All list point data can be stored in nonvolatile memory using one of the available setup
register. This means that the programmed data for any list function will be retained when it is
saved in the register when the AC source is turned off.
Note: If the transient list is programmed over the bus, the transient must be
executed at least once or it will not be saved to the setup register
when the *SAV command is sent. Unexecuted transient lists have not
been compiled yet by the AC/DC power source controller and will not
be saved as part of a front panel setup. This is not the case when the
transient list is entered from the front panel. Front panel entered
transient lists will be saved even if they have not been executed yet.
Lists are paced by a separate list of dwell times which define the duration of each output
setting. Therefore, each of the up to 32 list points has an associated dwell time, which
specifies the time (in seconds) that the output remain at that setting before moving on to the
next setting.
The following procedure shows how to generate a simple list of voltage and frequency
changes.
Step 1 : Set the mode of each function that will participate in the output sequence to LIST.
For example:
VOLTage:MODE LIST
FREQuency:MODE LIST
Step 2 : Program the list of output values for each function. The list commands take a
comma-separated list of arguments. The order in which the arguments are given determines
the sequence in which the values will be output. For example, to cycle the voltage through a
sequence that includes nominal line, high line, and low line, a list may include the following
values:
LIST:VOLTage 135, 100, 120, 135, 100, 128, 110, 102, 132, 112
You can specify lists for more than one function. For example, to synchronize the previous
voltage list with another list that varies the output frequency from nominal, to high, to low, the
lists may include the following values:
LIST:VOLTage 135, 100, 120, 135, 100, 128, 110, 102, 132, 112
LIST:FREQuency 60, 60, 60, 63, 63, 63, 57, 57, 57, 60
All lists must have the same number of data values or points, or an error will occur when the
transient system that starts the sequence is later initiated. The exception is when a list has
only one item or point. In this case the single-item list is treated as if it had the same number
of points as the other lists, with all values being equal to the one item. For example:
LIST:VOLTage 120, 100, 110;FREQuency 60
is the same as: