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416 error "step size too small"

6220, 6221 Current Sources
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hachiko
Posts: 18
Joined: May 15th, 2013, 6:02 am
Country: China

416 error "step size too small"

Post by hachiko » July 11th, 2013, 7:47 am

With Labview, I am following this order to send command to 6221 for differential conductance setting:
*RST
SOUR:DCON:STAR 0
SOUR:DCON:STEP 10e-6
SOUR:DCON:STOP 50e-6
SOUR:DCON:DELT 20e-6
SOUR:DCON:DEL 1e-3
But it always gets error "step size too small".
See the following laview code. With "*RST" before the code, I always get that error.
Without "*RST" ahead, I may get the settings (start, step ,stop, delta, delay) wrote through with a second run of the code.
What is the point?
Attachments
setting_DC.png
config differential conductance
setting_DC.png (40.48 KiB) Viewed 14771 times

Dale C
Keithley Applications
Keithley Applications
Posts: 2848
Joined: June 10th, 2010, 6:22 am
Country: United States
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Re: 416 error "step size too small"

Post by Dale C » July 11th, 2013, 8:10 am

I tried this and it was ok.
Maybe something in the variables. I would look a the STEP command.
Attachments
6221DIFCON.png
6221DIFCON.png (359.12 KiB) Viewed 14769 times

hachiko
Posts: 18
Joined: May 15th, 2013, 6:02 am
Country: China

Re: 416 error "step size too small"

Post by hachiko » July 11th, 2013, 6:00 pm

Please run my VI attached. It always gets 416 error.
Attachments
Diff_Conduct_Current_setting.vi
(26.1 KiB) Downloaded 1308 times

hachiko
Posts: 18
Joined: May 15th, 2013, 6:02 am
Country: China

Re: 416 error "step size too small"

Post by hachiko » July 11th, 2013, 11:46 pm

It seems must be in the order of "START STOP STEP DELT DELAY ".
*RST
:SOUR:DCON:STAR 0.000000000
:SOUR:DCON:STOP 0.010000000
:SOUR:DCON:STEP 0.000100000
:SOUR:DCON:DELT 0.000020000
:SOUR:DCON:DEL 0.050000000

otherwise get error 416:
*RST
:SOUR:DCON:STAR 0.000000000
:SOUR:DCON:STEP 0.000100000
:SOUR:DCON:STOP 0.010000000
:SOUR:DCON:DELT 0.000020000
:SOUR:DCON:DEL 0.050000000

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