Delta Elektronika Interface
Only the features of the available that are required by Zahner-Elektrik have been implemented.
TCP/IP Interface
- class DeltaConnection
Class to handle the connection to the Delta Elektronika power supply connection.
- connect(ip, port)
Connect to Delta Elektronika power supply.
- Parameters
ip – The hostname or ip-address of the Delta Elektronika power supply.
port – The port.
- Returns
True on success, False if failed.
- Return type
bool
- disconnect()
Close the connection.
- isConnected()
Check if the connection to the Delta Elektronika is open.
- Returns
True if connected, False if not.
- Return type
bool
- sendTelegram(payload, timeout=None)
Send a telegram/data.
- Parameters
payload – The actual data which is being sent. This can be a string or an bytearray.
timeout – The timeout for sending data in seconds, blocking at None.
- waitForBinaryTelegram(timeout=None)
Block infinitely until the next Telegram is arriving.
If some Telegram has already arrived it will just return the last one from the queue.
- Parameters
timeout – The timeout for sending data in seconds, blocking at None
- Returns
The response from the device or an empty bytearray if someting went wrong.
- Return type
bytearray
- waitForStringTelegram(timeout=None)
Block infinitely until the next Telegram is arriving.
If some Telegram has already arrived it will just return the last one from the queue.
- Parameters
timeout – The timeout for sending data in seconds, blocking at None
- Returns
The last received telegram or an empty string if someting went wrong.
- Return type
string
- sendStringAndWaitForReplyString(payload, timeout=None)
Convenience function: Send a telegram and wait for it’s reply.
If a timeout or a socket error occurs an exception is thrown.
- Parameters
payload – The actual data which is being sent. This can be a string or an bytearray.
timeout – The timeout for sending data in seconds, blocking at None.
- Returns
The last received telegram or an empty string if someting went wrong.
- Return type
string
- _telegramListenerJob()
The method running in a separate thread, pushing the incomming packets into the queues.
- _startTelegramListener()
Starts the thread handling the asyncronously incoming data.
- _stopTelegramListener()
Stops the thread handling the incoming data gracefully.
- _readTelegramFromSocket()
Reads the raw telegram structure from the socket stream.
When a socket exception occurs, None and an empty byte array are returned. The caller of the function then passes the None to the queue to raise an exception in the threads waiting at the queue.
- _closeSocket()
Close the socket.
SCPI Commands Wrapper
- class DeltaSCPIWrapper(connection)
Class containing the SCPI commands for the Delta Elektronika power supply.
This class wraps the SCPI commands in getter and setter methods.
- Parameters
connection (
DeltaConnection) – The connection object to the Delta power supply.
- setDefaultTimout(time)
Set the default timeout.
The command sets the default timeout that is used.
- Parameters
time – Timout in seconds.
- IDN()
Querying the device identification.
This is the standard SCPI command for requesting the identification.
- Returns
The response string from the device.
- setTargetVoltage(value)
Set the target output voltage.
- Parameters
value – The output voltage.
- setTargetCurrent(value)
Set the target output current.
- Parameters
value – The output current.
- getTargetVoltage()
Read the target output voltage.
- Returns
The value.
- getTargetCurrent()
Read the target output current.
- Returns
The value.
- getMeasuredVoltage()
Measure the actual output voltage.
- Returns
The value.
- getMeasuredCurrent()
Measure the actual output current.
- Returns
The value.
- getMeasuredPower()
Measure the actual output power.
- Returns
The value.
- setProgSourceVoltage(source: DeltaSources)
Set the voltage source option.
Defines which interface defines the voltage to be applied.
- Parameters
source (
DeltaSources) – The source option.
- setProgSourceCurrent(source: DeltaSources)
Set the current source option.
Defines which interface defines the current to be applied.
- Parameters
source (
DeltaSources) – The source option.
- enableOutput(enable=True)
Enable the output of the supply.
- Parameters
enable – True to turn the output on.
- disableOutput()
Disable the output of the supply.
- executeCommand(command, timeout=None)
Executes a command.
- Parameters
command – The command.
timeout – The timeout for sending data in seconds, blocking at None.
- executeCommandAndWaitForReply(command, timeout=None)
Executes a command and waits for the reply from the device.
- Parameters
command – The command.
timeout – The timeout for sending data in seconds, blocking at None.
Source Options
- enum DeltaSources(value)
Delta Elektronika power supply source options.
The class manages the possible sources to be used for setting the target voltage and current.
Valid values are as follows:
- front = <DeltaSources.front: 'front'>
- web = <DeltaSources.web: 'web'>
- seq = <DeltaSources.seq: 'seq'>
- eth = <DeltaSources.eth: 'eth'>
- slot1 = <DeltaSources.slot1: 'slot1'>
- slot2 = <DeltaSources.slot2: 'slot2'>
- slot3 = <DeltaSources.slot3: 'slot3'>
- slot4 = <DeltaSources.slot4: 'slot4'>
- loc = <DeltaSources.loc: 'loc'>
- rem = <DeltaSources.rem: 'rem'>
Exceptions
- class DeltaConnectionError(message)
Delta Connection Exception Class
This exception is thrown when an error occurs with the term communication, which has not yet been thrown by a socket exception.
After this error the connection must be completely rebuilt.
- class DeltaSCPIError(message)
Delta Connection Exception Class
This exception is thrown when an error occurs with the communication, which has not yet been thrown by a socket exception.
After this error the connection must be completely rebuilt.