Process data
Introduction
This section describes the main PDOs and their content. A PDO (Process Data Object) is a unit on cyclically transmitted process values. Such a unit can be an individual variable (e.g. the supply voltage as a 32-bit value) or a group/structure of variables. The individual PDOs can be activated or deactivated separately in the TwinCAT System Manager. The ‘Process data’ tab is used for this (visible only if the terminal is selected on the left). A change in the composition of the process data in the TwinCAT System Manager becomes effective only after restarting the EtherCAT system.
Process image
BCT Inputs
|
Index 0x6000: BCT Inputs | |||||
|---|---|---|---|---|---|
|
Index (hex) |
Size (byte.bit) |
Data type |
Name |
Unit |
Description |
|
6000:01 |
0.1 |
BOOL |
Terminal overtemperature |
- |
If this bit is activated there is an overtemperature on the PCB. |
|
6000:02 |
0.1 |
BOOL |
I2T error |
- |
If this bit is activated there is an overtemperature in the external resistor according to the internal simulation. However, the resistor continues to heat up because the setting “Disable Chopper on overtemperature” has not been set. |
|
6000:03 |
0.1 |
BOOL |
I2T warning |
- |
The warning temperature threshold value from the CoE data has been exceeded by the temperature model. If the setting “Disable Chopper on overtemperature” is active , the chopper switches on again in case of overvoltage only after the voltage falls below this value. |
|
6000:04 |
0.1 |
BOOL |
Overvoltage |
- |
The overvoltage threshold value has been exceeded. The chopper is switched on in case of adherence to the temperatures from the internal temperature model. |
|
6000:05 |
0.1 |
BOOL |
Undervoltage |
- |
The voltage has fallen below the undervoltage threshold value from the CoE data. |
|
6000:06 |
0.1 |
BOOL |
Chopper on |
- |
The external resistor is active, i.e. electrical energy is being converted to thermal energy in the resistor. |
|
6000:11 |
4.0 |
UDINT |
DC link voltage |
mV |
External supply voltage in mV |
|
6000:13 |
4.0 |
UDINT |
Resistor current |
mA |
Current through the external resistor in mA |
|
6000:14 |
1.0 |
USINT |
Duty cycle |
% |
Temporal utilization of the external resistor in the last 100 ms in %. |
Further notes on the CoE objects and on parameterization can be found in the section “Object description and parameterization”.