Deutsch
English
Menu
Specifications / Modbus Protocol / API / Bricklets / Industrial Dual Analog In Bricklet 2.0

Modbus - Industrial Dual Analog In Bricklet 2.0

This is the description of the Modbus protocol for the Industrial Dual Analog In Bricklet 2.0. General information and technical specifications for the Industrial Dual Analog In Bricklet 2.0 are summarized in its hardware description.

API

A general description of the Modbus protocol structure can be found here.

The Bricklet has two input channel. Functions that are related directly to a channel have a channel parameter to specify one of the two channels. Valid values for the channel parameter are 0 and 1.

Basic Functions

BrickletIndustrialDualAnalogInV2.get_voltage
Function ID:
  • 1
Request:
  • channel – Type: uint8, Range: [0 to 1]
Response:
  • voltage – Type: int32, Unit: 1 mV, Range: [-35000 to 35000]

Returns the voltage for the given channel.

If you want to get the value periodically, it is recommended to use the CALLBACK_VOLTAGE callback. You can set the callback configuration with set_voltage_callback_configuration.

BrickletIndustrialDualAnalogInV2.set_channel_led_config
Function ID:
  • 10
Request:
  • channel – Type: uint8, Range: [0 to 1]
  • config – Type: uint8, Range: See meanings, Default: 3
Response:
  • no response

Each channel has a corresponding LED. You can turn the LED off, on or show a heartbeat. You can also set the LED to "Channel Status". In this mode the LED can either be turned on with a pre-defined threshold or the intensity of the LED can change with the measured value.

You can configure the channel status behavior with set_channel_led_status_config.

By default all channel LEDs are configured as "Channel Status".

The following meanings are defined for the elements of this function:

For config:

  • 0 = Off
  • 1 = On
  • 2 = Show Heartbeat
  • 3 = Show Channel Status
BrickletIndustrialDualAnalogInV2.get_channel_led_config
Function ID:
  • 11
Request:
  • channel – Type: uint8, Range: [0 to 1]
Response:
  • config – Type: uint8, Range: See meanings, Default: 3

Returns the channel LED configuration as set by set_channel_led_config

The following meanings are defined for the elements of this function:

For config:

  • 0 = Off
  • 1 = On
  • 2 = Show Heartbeat
  • 3 = Show Channel Status
BrickletIndustrialDualAnalogInV2.set_channel_led_status_config
Function ID:
  • 12
Request:
  • channel – Type: uint8, Range: [0 to 1]
  • min – Type: int32, Unit: 1 mV, Range: [-231 to 231 - 1], Default: 0
  • max – Type: int32, Unit: 1 mV, Range: [-231 to 231 - 1], Default: 10000
  • config – Type: uint8, Range: See meanings, Default: 1
Response:
  • no response

Sets the channel LED status config. This config is used if the channel LED is configured as "Channel Status", see set_channel_led_config.

For each channel you can choose between threshold and intensity mode.

In threshold mode you can define a positive or a negative threshold. For a positive threshold set the "min" parameter to the threshold value in mV above which the LED should turn on and set the "max" parameter to 0. Example: If you set a positive threshold of 10V, the LED will turn on as soon as the voltage exceeds 10V and turn off again if it goes below 10V. For a negative threshold set the "max" parameter to the threshold value in mV below which the LED should turn on and set the "min" parameter to 0. Example: If you set a negative threshold of 10V, the LED will turn on as soon as the voltage goes below 10V and the LED will turn off when the voltage exceeds 10V.

In intensity mode you can define a range in mV that is used to scale the brightness of the LED. Example with min=4V, max=20V: The LED is off at 4V, on at 20V and the brightness is linearly scaled between the values 4V and 20V. If the min value is greater than the max value, the LED brightness is scaled the other way around.

The following meanings are defined for the elements of this function:

For config:

  • 0 = Threshold
  • 1 = Intensity
BrickletIndustrialDualAnalogInV2.get_channel_led_status_config
Function ID:
  • 13
Request:
  • channel – Type: uint8, Range: [0 to 1]
Response:
  • min – Type: int32, Unit: 1 mV, Range: [-231 to 231 - 1], Default: 0
  • max – Type: int32, Unit: 1 mV, Range: [-231 to 231 - 1], Default: 10000
  • config – Type: uint8, Range: See meanings, Default: 1

Returns the channel LED status configuration as set by set_channel_led_status_config.

The following meanings are defined for the elements of this function:

For config:

  • 0 = Threshold
  • 1 = Intensity

Advanced Functions

BrickletIndustrialDualAnalogInV2.set_sample_rate
Function ID:
  • 5
Request:
  • rate – Type: uint8, Range: See meanings, Default: 6
Response:
  • no response

Sets the sample rate. The sample rate can be between 1 sample per second and 976 samples per second. Decreasing the sample rate will also decrease the noise on the data.

The following meanings are defined for the elements of this function:

For rate:

  • 0 = 976 SPS
  • 1 = 488 SPS
  • 2 = 244 SPS
  • 3 = 122 SPS
  • 4 = 61 SPS
  • 5 = 4 SPS
  • 6 = 2 SPS
  • 7 = 1 SPS
BrickletIndustrialDualAnalogInV2.get_sample_rate
Function ID:
  • 6
Request:
  • empty payload
Response:
  • rate – Type: uint8, Range: See meanings, Default: 6

Returns the sample rate as set by set_sample_rate.

The following meanings are defined for the elements of this function:

For rate:

  • 0 = 976 SPS
  • 1 = 488 SPS
  • 2 = 244 SPS
  • 3 = 122 SPS
  • 4 = 61 SPS
  • 5 = 4 SPS
  • 6 = 2 SPS
  • 7 = 1 SPS
BrickletIndustrialDualAnalogInV2.set_calibration
Function ID:
  • 7
Request:
  • offset – Type: int32[2], Range: [-223 to 223 - 1]
  • gain – Type: int32[2], Range: [-223 to 223 - 1]
Response:
  • no response

Sets offset and gain of MCP3911 internal calibration registers.

See MCP3911 datasheet 7.7 and 7.8. The Industrial Dual Analog In Bricklet 2.0 is already factory calibrated by Tinkerforge. It should not be necessary for you to use this function

BrickletIndustrialDualAnalogInV2.get_calibration
Function ID:
  • 8
Request:
  • empty payload
Response:
  • offset – Type: int32[2], Range: [-223 to 223 - 1]
  • gain – Type: int32[2], Range: [-223 to 223 - 1]

Returns the calibration as set by set_calibration.

BrickletIndustrialDualAnalogInV2.get_adc_values
Function ID:
  • 9
Request:
  • empty payload
Response:
  • value – Type: int32[2], Range: [-223 to 223 - 1]

Returns the ADC values as given by the MCP3911 IC. This function is needed for proper calibration, see set_calibration.

BrickletIndustrialDualAnalogInV2.get_all_voltages
Function ID:
  • 14
Request:
  • empty payload
Response:
  • voltages – Type: int32[2], Unit: 1 mV, Range: [-35000 to 35000]

Returns the voltages for all channels.

If you want to get the value periodically, it is recommended to use the CALLBACK_ALL_VOLTAGES callback. You can set the callback configuration with set_all_voltages_callback_configuration.

New in version 2.0.6 (Plugin).

BrickletIndustrialDualAnalogInV2.get_spitfp_error_count
Function ID:
  • 234
Request:
  • empty payload
Response:
  • error_count_ack_checksum – Type: uint32, Range: [0 to 232 - 1]
  • error_count_message_checksum – Type: uint32, Range: [0 to 232 - 1]
  • error_count_frame – Type: uint32, Range: [0 to 232 - 1]
  • error_count_overflow – Type: uint32, Range: [0 to 232 - 1]

Returns the error count for the communication between Brick and Bricklet.

The errors are divided into

  • ACK checksum errors,
  • message checksum errors,
  • framing errors and
  • overflow errors.

The errors counts are for errors that occur on the Bricklet side. All Bricks have a similar function that returns the errors on the Brick side.

BrickletIndustrialDualAnalogInV2.set_status_led_config
Function ID:
  • 239
Request:
  • config – Type: uint8, Range: See meanings, Default: 3
Response:
  • no response

Sets the status LED configuration. By default the LED shows communication traffic between Brick and Bricklet, it flickers once for every 10 received data packets.

You can also turn the LED permanently on/off or show a heartbeat.

If the Bricklet is in bootloader mode, the LED is will show heartbeat by default.

The following meanings are defined for the elements of this function:

For config:

  • 0 = Off
  • 1 = On
  • 2 = Show Heartbeat
  • 3 = Show Status
BrickletIndustrialDualAnalogInV2.get_status_led_config
Function ID:
  • 240
Request:
  • empty payload
Response:
  • config – Type: uint8, Range: See meanings, Default: 3

Returns the configuration as set by set_status_led_config

The following meanings are defined for the elements of this function:

For config:

  • 0 = Off
  • 1 = On
  • 2 = Show Heartbeat
  • 3 = Show Status
BrickletIndustrialDualAnalogInV2.get_chip_temperature
Function ID:
  • 242
Request:
  • empty payload
Response:
  • temperature – Type: int16, Unit: 1 °C, Range: [-215 to 215 - 1]

Returns the temperature as measured inside the microcontroller. The value returned is not the ambient temperature!

The temperature is only proportional to the real temperature and it has bad accuracy. Practically it is only useful as an indicator for temperature changes.

BrickletIndustrialDualAnalogInV2.reset
Function ID:
  • 243
Request:
  • empty payload
Response:
  • no response

Calling this function will reset the Bricklet. All configurations will be lost.

After a reset you have to create new device objects, calling functions on the existing ones will result in undefined behavior!

BrickletIndustrialDualAnalogInV2.get_identity
Function ID:
  • 255
Request:
  • empty payload
Response:
  • uid – Type: char[8]
  • connected_uid – Type: char[8]
  • position – Type: char, Range: ['a' to 'h', 'z']
  • hardware_version – Type: uint8[3]
    • 0: major – Type: uint8, Range: [0 to 255]
    • 1: minor – Type: uint8, Range: [0 to 255]
    • 2: revision – Type: uint8, Range: [0 to 255]
  • firmware_version – Type: uint8[3]
    • 0: major – Type: uint8, Range: [0 to 255]
    • 1: minor – Type: uint8, Range: [0 to 255]
    • 2: revision – Type: uint8, Range: [0 to 255]
  • device_identifier – Type: uint16, Range: [0 to 216 - 1]

Returns the UID, the UID where the Bricklet is connected to, the position, the hardware and firmware version as well as the device identifier.

The position can be 'a', 'b', 'c', 'd', 'e', 'f', 'g' or 'h' (Bricklet Port). A Bricklet connected to an Isolator Bricklet is always at position 'z'.

The device identifier numbers can be found here. 

Callback Configuration Functions

BrickletIndustrialDualAnalogInV2.set_voltage_callback_configuration
Function ID:
  • 2
Request:
  • channel – Type: uint8, Range: [0 to 1]
  • period – Type: uint32, Unit: 1 ms, Range: [0 to 232 - 1], Default: 0
  • value_has_to_change – Type: bool, Default: false
  • option – Type: char, Range: See meanings, Default: 'x'
  • min – Type: int32, Unit: 1 mV, Range: [-231 to 231 - 1], Default: 0
  • max – Type: int32, Unit: 1 mV, Range: [-231 to 231 - 1], Default: 0
Response:
  • no response

The period is the period with which the CALLBACK_VOLTAGE callback is triggered periodically. A value of 0 turns the callback off.

If the value has to change-parameter is set to true, the callback is only triggered after the value has changed. If the value didn't change within the period, the callback is triggered immediately on change.

If it is set to false, the callback is continuously triggered with the period, independent of the value.

It is furthermore possible to constrain the callback with thresholds.

The option-parameter together with min/max sets a threshold for the CALLBACK_VOLTAGE callback.

The following options are possible:

Option Description
'x' Threshold is turned off
'o' Threshold is triggered when the value is outside the min and max values
'i' Threshold is triggered when the value is inside or equal to the min and max values
'<' Threshold is triggered when the value is smaller than the min value (max is ignored)
'>' Threshold is triggered when the value is greater than the min value (max is ignored)

If the option is set to 'x' (threshold turned off) the callback is triggered with the fixed period.

The following meanings are defined for the elements of this function:

For option:

  • 'x' = Off
  • 'o' = Outside
  • 'i' = Inside
  • '<' = Smaller
  • '>' = Greater
BrickletIndustrialDualAnalogInV2.get_voltage_callback_configuration
Function ID:
  • 3
Request:
  • channel – Type: uint8, Range: [0 to 1]
Response:
  • period – Type: uint32, Unit: 1 ms, Range: [0 to 232 - 1], Default: 0
  • value_has_to_change – Type: bool, Default: false
  • option – Type: char, Range: See meanings, Default: 'x'
  • min – Type: int32, Unit: 1 mV, Range: [-231 to 231 - 1], Default: 0
  • max – Type: int32, Unit: 1 mV, Range: [-231 to 231 - 1], Default: 0

Returns the callback configuration as set by set_voltage_callback_configuration.

The following meanings are defined for the elements of this function:

For option:

  • 'x' = Off
  • 'o' = Outside
  • 'i' = Inside
  • '<' = Smaller
  • '>' = Greater
BrickletIndustrialDualAnalogInV2.set_all_voltages_callback_configuration
Function ID:
  • 15
Request:
  • period – Type: uint32, Unit: 1 ms, Range: [0 to 232 - 1], Default: 0
  • value_has_to_change – Type: bool, Default: false
Response:
  • no response

The period is the period with which the CALLBACK_ALL_VOLTAGES callback is triggered periodically. A value of 0 turns the callback off.

If the value has to change-parameter is set to true, the callback is only triggered after at least one of the values has changed. If the values didn't change within the period, the callback is triggered immediately on change.

If it is set to false, the callback is continuously triggered with the period, independent of the value.

New in version 2.0.6 (Plugin).

BrickletIndustrialDualAnalogInV2.get_all_voltages_callback_configuration
Function ID:
  • 16
Request:
  • empty payload
Response:
  • period – Type: uint32, Unit: 1 ms, Range: [0 to 232 - 1], Default: 0
  • value_has_to_change – Type: bool, Default: false

Returns the callback configuration as set by set_all_voltages_callback_configuration.

New in version 2.0.6 (Plugin).

Callbacks

BrickletIndustrialDualAnalogInV2.CALLBACK_VOLTAGE
Function ID:
  • 4
Response:
  • channel – Type: uint8, Range: [0 to 1]
  • voltage – Type: int32, Unit: 1 mV, Range: [-35000 to 35000]

This callback is triggered periodically according to the configuration set by set_voltage_callback_configuration.

The response value is the same as get_voltage.

BrickletIndustrialDualAnalogInV2.CALLBACK_ALL_VOLTAGES
Function ID:
  • 17
Response:
  • voltages – Type: int32[2], Unit: 1 mV, Range: [-35000 to 35000]

This callback is triggered periodically according to the configuration set by set_all_voltages_callback_configuration.

The response values are the same as get_all_voltages.

New in version 2.0.6 (Plugin).

Internal Functions

Internal functions are used for maintenance tasks such as flashing a new firmware of changing the UID of a Bricklet. These task should be performed using Brick Viewer instead of using the internal functions directly.

BrickletIndustrialDualAnalogInV2.set_bootloader_mode
Function ID:
  • 235
Request:
  • mode – Type: uint8, Range: See meanings
Response:
  • status – Type: uint8, Range: See meanings

Sets the bootloader mode and returns the status after the requested mode change was instigated.

You can change from bootloader mode to firmware mode and vice versa. A change from bootloader mode to firmware mode will only take place if the entry function, device identifier and CRC are present and correct.

This function is used by Brick Viewer during flashing. It should not be necessary to call it in a normal user program.

The following meanings are defined for the elements of this function:

For mode:

  • 0 = Bootloader
  • 1 = Firmware
  • 2 = Bootloader Wait For Reboot
  • 3 = Firmware Wait For Reboot
  • 4 = Firmware Wait For Erase And Reboot

For status:

  • 0 = OK
  • 1 = Invalid Mode
  • 2 = No Change
  • 3 = Entry Function Not Present
  • 4 = Device Identifier Incorrect
  • 5 = CRC Mismatch
BrickletIndustrialDualAnalogInV2.get_bootloader_mode
Function ID:
  • 236
Request:
  • empty payload
Response:
  • mode – Type: uint8, Range: See meanings

Returns the current bootloader mode, see set_bootloader_mode.

The following meanings are defined for the elements of this function:

For mode:

  • 0 = Bootloader
  • 1 = Firmware
  • 2 = Bootloader Wait For Reboot
  • 3 = Firmware Wait For Reboot
  • 4 = Firmware Wait For Erase And Reboot
BrickletIndustrialDualAnalogInV2.set_write_firmware_pointer
Function ID:
  • 237
Request:
  • pointer – Type: uint32, Unit: 1 B, Range: [0 to 232 - 1]
Response:
  • no response

Sets the firmware pointer for write_firmware. The pointer has to be increased by chunks of size 64. The data is written to flash every 4 chunks (which equals to one page of size 256).

This function is used by Brick Viewer during flashing. It should not be necessary to call it in a normal user program.

BrickletIndustrialDualAnalogInV2.write_firmware
Function ID:
  • 238
Request:
  • data – Type: uint8[64], Range: [0 to 255]
Response:
  • status – Type: uint8, Range: [0 to 255]

Writes 64 Bytes of firmware at the position as written by set_write_firmware_pointer before. The firmware is written to flash every 4 chunks.

You can only write firmware in bootloader mode.

This function is used by Brick Viewer during flashing. It should not be necessary to call it in a normal user program.

BrickletIndustrialDualAnalogInV2.write_uid
Function ID:
  • 248
Request:
  • uid – Type: uint32, Range: [0 to 232 - 1]
Response:
  • no response

Writes a new UID into flash. If you want to set a new UID you have to decode the Base58 encoded UID string into an integer first.

We recommend that you use Brick Viewer to change the UID.

BrickletIndustrialDualAnalogInV2.read_uid
Function ID:
  • 249
Request:
  • empty payload
Response:
  • uid – Type: uint32, Range: [0 to 232 - 1]

Returns the current UID as an integer. Encode as Base58 to get the usual string version.