Keysight Technologies L4490A, Руководство пользователя

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Keysight L4490A/L4491A User’s Guide 101
Introduction to Programming
Figure 4-8. Running the Y1156A Verification Sequence.
Position Indicator Verification
Many Keysight switches contain position indicator options that allow for electronic
verification of the switch position. The 34945EXT module within the
L4490A/L4491A contains circuitry to detect these signals. The Y1156A verification
board can be used to test the functioning of this circuitry.
1 Turn off the channel drive (module configuration window) or turn off the
L4490A/L4491A.
2 Install the verification board in bank 1 (or the desired bank) of the 34945EXT.
Securely fasten the verification board within the bank using the terminal
screws.
3 Turn on the L4490A/L4491A (if turned off) and open the web interface. Select
the ‘Browser Web Control’ page and select ‘Allow Full Control’.
4 In the ‘Browser Web Control’ window, locate the bank and Y1156A
programming diagram. An example of the diagram is shown in Figure 4-9.
5 From the bank configuration window, select ‘
Preset Bank
’ (the channel drive
(module configuration window) must be off before ‘
Preset Bank
’ is active).
6 Open the ‘SCPI Command Interface’ window (Figure 4-9) and from the window,
send the commands:
ROUT:CHAN:VER:ENAB ON,(@1101:1118) !enable verification
ROUT:CHAN:VER:POL INV,(@1101:1118) !invert the polarity
ROUT:CHAN:DRIV:PULS:MODE OFF,(@1101:1118) !continuous drive
7 Create a verification sequence (see “Sequence Programming”) that closes and
opens the desired channel(s). Enable the channel drive and execute the
sequence. With the polarity inverted (Step 6), closing the channel tests the
34945EXT circuitry receiving the position indication signal. An error message
will occur if the position sensed does not correspond to the programmed state.
8 To verify other channels, modify the channel address in the sequence as
required and execute the sequence again. To test another bank, set the
Channel
Drive
source to “Off”. Move the Y1156A to the bank and click the “Update View”
button to refresh the Web page. Repeat steps 5-6 (with the new bank address)
and change the channel addresses in the sequence.
When finished with the verification, turn off the continuous current mode to
prevent an overcurrent condition on the power supply driving the 34945EXT.