| 摘要 |
A method for controlling a multi-color signal assembly with a multi-color LED, a connection for voltage supply, and a control input. The control input is connected to a control output of a first control unit for controlling the signal assembly by pulse-width modulation signals (PWM signals) or to a signal assembly control output by the bus communication. After a supply voltage UB is connected, voltage UDI/BUS at the control input is measured within a predetermined time span Δt, wherein the first and second control units have respective first and second voltages at the control input within the time span Δt, wherein the first and second voltage are different. The signal assembly is placed in a BUS mode or in a PWM mode depending on the measured voltage UDI/BUS, can be controlled by bus communication in the BUS mode, and can be controlled by PWM signals in the PWM mode. |
| 主权项 |
1. A process of controlling a multicolored signal arrangement including a multicolored-LED, a voltage supply connection, and a control input, the process comprising:
connecting the control input of the signal arrangement with a first control output, of a first control unit, the first control unit being a programmable control system configured to control the signal arrangement using PMW signals, or connecting the control input with a second control output, of a second control unit, the second control unit being configured to control the signal arrangement using an asymmetrical bus-communication; and switching on a supply voltage, UB, to the signal arrangement over the voltage supply connection of the signal arrangement; measuring a first measured voltage, UDI/Bus at the control input of the signal arrangement within a pre-determined time interval, Δt, after the switching-on of the supply voltage, wherein the first control unit generates a first voltage at the control input within the time interval Δt, and the second control unit generates a second voltage at the control input within the dine interval Δt, the first voltage differing from the second voltage, the first or second control unit being programmed to obtain the differing voltages; moving the signal arrangement into a BUS-mode or into a PWM-mode depending on the measured voltage UDI/Bus, wherein the signal arrangement in the BUS-mode can be controlled with bus-communication and the signal arrangement in the PWM-mode can be controlled with the PWM-signals; and moving the signal arrangement into the PWM-mode depending on the first measured voltage UDI/Bus, if the signal arrangement is connected to the first control unit, or moving the signal arrangement into the BUS-mode if the signal arrangement is connected to the second control unit; and conveying, in parallel, control signals of the first and second control units to a UART-input and a digital input, DI-input, of a microcontroller of the signal arrangement, wherein, in the BUS-mode of the signal arrangement, the control signals are evaluated only over the UART-input, and wherein, in the PWM-mode of the signal arrangement, the control signals are evaluated only over the DI-input. |
