| 摘要 |
PCT No. PCT/DE90/00045 Sec. 371 Date Jul. 1, 1991 Sec. 102(e) Date Jul. 1, 1991 PCT Filed Jan. 25, 1990 PCT Pub. No. WO90/12381 PCT Pub. Date Oct. 18, 1990.Process for signalling malfunction protection in decentralised traffic-light installations having a signalling malfunction protection (SSP) and evaluation assembly (AWP) in a node control unit (KS) and having a plurality of PLS units (PLS modules M1, M2, . . . ) which each have peripheral lamp switches and sensors and a data transceiver, which together form an LMP assembly, as well as transformers and rectifiers for associated signal generators and groups of signal generators (SG) on the respective traffic-light poles (SGM1, SGM2, . . . ). The node control unit (KS) is connected to the PLS modules (M1, M2, . . . ) with a power and a data line (EDL). In addition to the customary signalling malfunction protection, the operativeness of the individual PLS modules and LMP assemblies (M1, M2, . . . ), respectively, is cyclically tested irrespective of the momentary signalling status. With each complete telegram cycle (TZ1, TZ2, . . . ), in each case one PLS module (LMP assembly) is tested with a separate test telegram (TB) by the signalling lamps (SL) of the respective PLS module (Mn) being switched off for a very brief period (e.g. 3 ms) with the first cycle, switched to red with the second cycle, to amber with the third cycle and to green with the fourth cycle, the correct acknowledgement (RM) being monitored in the signalling malfunction protection and evaluation assembly (SAB) and, when a fault occurs, the traffic-light installation being at least partially switched off or switched to flashing amber.
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