somanet-test-suite 1.1.5

Import module

import somanet_test_suite as sts

Create object

To connect to a specific PSU, you can call

Linux: psu = sts.PsuEA(comport='ttyACM0') or psu = sts.PsuEA(comport='usb-EA_Elektro-Automatik_PS_2042-10B_2815450332-if00')

Windows: psu = sts.PsuEA(comport='COM1') or as com port description: psu = sts.PsuEA(comport='PS 2000 B')

If you added the device rule and you connected only one PSU, there is no need to provide a device name:

psu = sts.PsuEA()

Also possible is:

psu = sts.PsuEA(comport='ea-ps-20xx-xx-0')

psu = sts.PsuEA(sn='0123456789')

or to use the device designator:

psu = sts.PsuEA(desi='PS 2142-10B')

Dis/connect to power supply for controlling

psu.remote_on()

psu.remote_off()

For multi output devices most functions provide an additional output argument:

psu.remote_on(output_num=0)

psu.remote_on(output_num=1)

Power on and off output

psu.output_on()

psu.output_off()

or

psu.output_on(output_num=1)

psu.output_off(output_num=1)

Set parameters

Arguments can be int or float.

psu.set_voltage(24, output_num=0)

psu.set_current(0.5, output_num=0)

psu.set_ovp(30, output_num=0)

psu.set_ocp(8, output_num=0)

The script will always set the maximum possible values in dependency of the nominal power.

Get parameters

Return argument: float.

psu.get_voltage(output_num: int)

psu.get_current(output_num: int)

psu.get_power(output_num: int)

Maximum sampling rate is ~10 Hz.

Nominal values:

If update is true, the value will be pulled directly from the device.

psu.get_nominal_voltage(output_num: int, update: bool)

psu.get_nominal_current(output_num: int, update: bool)

psu.get_nominal_power(output_num: int, update: bool)

Reset error

If an overcurrent, overvoltage, overpower or overtemperature protection error happens, you can reset the error with:

psu.reset_error(output_num: int)

Tracking

(Only 3-port devices). Tracking disables the controlling of output 2. Output 1 controls then also output 2.

psu.tracking_on()

psu.tracking_off()

Get status

Return argument: dictionary

psu.get_status(update: bool)

List of dictionary containing the following keys (index is output number):

• ‘output’ (int)

• ‘remote on’ (bool)

• ‘output on’ (bool)

• ‘controller state’ (‘CV’, ‘CC’)

• ‘tracking active’ (bool)

• ‘OVP activ’ (bool)

• ‘OCP activ’ (bool)

• ‘OPP activ’ (bool)

• ‘OTP activ’ (bool)

• ‘act voltage’ (float)

• ‘act current’ (float)

Get device description

Return argument: tuple (name, SN)

psu.get_device_description(update : bool)

Close connection

To close the connection, call:

psu.close()

This will just stop the communication, the PSU outputs will remain in their current states.

Preperation

What you need:

• LabJack

• SN75174 Differential Line Driver (for RS-422 communication and as level shifter 3.3V -> 5V)

Connection

See also: https://doc.synapticon.com/hardware/drive/drive_1000/d3/docs/index.html#encoder-port-1

Usage

Hall

sensor = Sanssouci(printer.write, 'HALL', pole_pairs=7)

sensor.set_velocity(20)

QEI

sensor = Sanssouci(printer.write, 'QEI', resolution=100)

sensor.set_velocity(20)