SIMATIC TDC is the perfect modular multiprocessor automation system for drive, control and technology tasks with high volumes and short cycle times. SIMATIC TDC consists of one or several subracks. The subracks are equipped with processor, periphery and communication modules. The enhanced application module FM 458-1 DP combines powerful arithmetic operations ability, high processing speed, precision and flexibility. These are the features required to solve a wide range of processing tasks universally even with extremely high throughput rates.