Self-configuring peripheral module
AssigneeSiemens Aktiengesellschaft
InventorSevan Haritounian
Life of this patent
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Abstract
A peripheral module of a programmable controller and method for operating the peripheral module, wherein in a calibration mode a base voltage value is supplied by the peripheral module to a terminal via a switching device, the supply potential is changed at a start time by the peripheral module to the modified value and a response time at which the expected change occurs is acquired, and the valid time interval is ascertained by the peripheral module utilizing the start time and the response time.
Claims16
An operating method for a peripheral module of a programmable controller, the peripheral module outputting, via a terminal of the peripheral module, a supply potential and, in this respect, an associated supply current to a field unit connected to the peripheral module, in a normal mode, the supply potential having a base voltage value and, in this respect, the supply current having a base current value, the peripheral module changing over from time-to-time from normal mode into a test mode, during which the peripheral module:
- changes the supply potential from the base voltage value to a modified voltage value by driving a switching device which is upstream of the terminal within the peripheral module for a defined valid time interval,
- checks whether, after the defined time interval has elapsed, an expected change has occurred due to the modification of the supply potential,
- changes back to normal mode if the expected change occurs and
- changes over to alarm mode if the expected change does not occur,
- wherein, in alarm mode, the peripheral module at least one of outputs an alarm message to a central unit of the programmable controller and (ii) transfers actuators connected to the peripheral module into a safe state via outputs of the peripheral module,
- wherein, during commissioning of the peripheral module, said peripheral module initially changes over prior to normal mode into a calibration mode, in calibration mode the method comprising:
- supplying, by the peripheral module, the base voltage value to the terminal via the switching device;
- changing, by the peripheral module, at a start time, the supply potential to the modified value and acquiring a response time at which the expected change occurs;
- and
- ascertaining, by the peripheral module, the valid time interval utilizing the start time and the response time.
A peripheral module of a programmable controller, comprising:
- a terminal, via which the peripheral module outputs a supply potential and, in this respect, an associated supply current to a field unit connected to the peripheral module;
- a controller which operates the peripheral module at least in a normal mode, a test mode, an alarm mode and a calibration mode, said controller operating the peripheral module such that, in normal mode, the supply potential has a base voltage value and, in this respect, the supply current has a base current value, said controller transferring the peripheral module from time-to-time from normal mode into test mode,
- wherein, in test mode, the controller:
- changes the supply potential (U) from the base voltage value to a modified voltage value by driving a switching device which is upstream of the terminal within the peripheral module for a defined valid time interval,
- checks whether, after the defined time interval has elapsed, an expected change has occurred due to the modification of the supply potential,
- changes back over into normal mode if the expected change occurs, and transfers the peripheral module into alarm mode if the expected change does not occur;
- wherein, in alarm mode, the controller at least one of (i) outputs an alarm message to a central unit of the programmable controller and (ii) transfers actuators connected to the peripheral module into a safe state via outputs of the peripheral module;
- wherein, during commissioning of the peripheral module, the controller initially operates the peripheral module in calibration mode prior to normal mode;
- wherein, in calibration mode, the controller:
- initially supplies the base voltage value to the terminal via the switching device,
- at a start time, then changes the supply potential to the modified value and acquires a response time at which the expected change occurs, and
- ascertains the valid time interval utilizing the start time and the response time.
Dependencies are inferred from the claim text.