Shae Cole

I have attempted to use PYVISA package with Python to communicate with SCIP commands with a Keithley 2602B instrument. I get error codes -285 where there seems to be syntax issues. 
When running the following code in python I get an error code -285 unexpected symbol near ':' : 
import pyvisa
# Initialize the VISA resource manager
    rm = pyvisa.ResourceManager()

# Connect to the Keithley 2600
    instrument = rm.open_resource('USB0::0x05E6::0x2602::4422867::INSTR')

# Initialize the instrument
        instrument.write('*RST')  # Reset the instrument to default settings
        
# Select channel A
        instrument.write(':INST:NSEL 1')  # Selects the source meter channel (channel A)
After this issue I noticed that for my Keithley instrument 2602B there are no SCPI commands for this instrument in the manual or at least the one I have. 

I have sense then installed Keithley Test Script Builder and I have connected the instrument but when I run this pre-made script I get a -286 error code -286 with a run time error attempting to index global 'debuffer1' (a nil value): 
--[[
This example demonstrates how to generate an I-V sweep on a solar panel.  
In this particular example the voltage is swept from 0V to 20V and the resulting current
is measured.  The maximum power, maximum current, maximum voltage, short circuit current,
and open circuit voltage are calculated and displayed in the Instrument Console along with
all the I-V sweep data. More information about this tsp code can be found in the 
View This First document.
--]]

--Define the number of points in the sweep.
num = 115

--Reset the Model 2460 and clear the buffer.
reset()
defbuffer1.clear()

--Set the source and measure functions.
smu.measure.func = smu.FUNC_DC_CURRENT
smu.source.func = smu.FUNC_DC_VOLTAGE

--Configure the measurement settings.
smu.measure.terminals = smu.TERMINALS_FRONT
smu.measure.sense = smu.SENSE_4WIRE
smu.measure.autorange = smu.ON
smu.measure.nplc = 1

--Configure the source settings.
smu.source.highc = smu.OFF
smu.source.range = 20
smu.source.readback = smu.ON
smu.source.highc = smu.OFF
smu.source.ilimit.level = 4
smu.source.sweeplinear("SolarCell", 0, 20, num, 0.05)

--Start the trigger model and wait for it to complete.
trigger.model.initiate()
waitcomplete()

--Define initial values.
voltage = defbuffer1.sourcevalues
current = defbuffer1
isc = current[1]
mincurr = current[1]
imax = current[1]
voc = voltage[1]
vmax = voltage[1]
pmax = voltage[1]*current[1]

--Calculate values.
for i = 1, num do
print(voltage[i],current[i],voltage[i]*current[i])
 if (voltage[i]*current[i] < pmax) then
pmax = voltage[i]*current[i]
imax = current[i]
vmax = voltage[i]
 end
 if math.abs(current[i]) < math.abs(mincurr) then
voc = voltage[i]
 end
end
pmax = math.abs(pmax)
imax = math.abs(imax)
print("Pmax = ", pmax, ", Imax = ", imax, ", Vmax = ", vmax, ", Isc = ", isc, ",Voc = ", voc)

--Display values on the Model 2460 front panel.
display.changescreen(display.SCREEN_USER_SWIPE)
display.settext(display.TEXT1, string.format("Pmax = %.4fW", pmax))
display.settext(display.TEXT2, string.format("Isc = %.4fA, Voc = %.2fV", isc, voc))

Any help would be greatly appreciated!