IS200JPDAG1A
IS200JPDAG1A
IS200JPDAG1A
HIACS7000 system produced by HITACHI. In the configuration of DCS, we configure the same hardware and software in the two units and realize the conversion of operation rights by switching switches. Signals from external devices are fed into two DCS systems through redundant configuration (analog) or extended conversion (switch). At the same time to ensure that there is no misoperation accident, but 
also increased a considerable part of the criterion conditions and I / 0 measuring points, the advantages of this way is when a unit outage or maintenance, can be more convenient to check the DCS, but also increased the reliability of the control, the disadvantage is to increase the number of external equipment,
increase the cost. Adding a link also means increasing the possibility of failure. DCS of Xinyang Phase I and Yiyang Phase I are INFI-90 system provided by Bailey Company. Common ring is adopted for its system structure, and the control of the common system is achieved through the configuration of common ring. Two sets of DCS are controlled by Tagnumber, which solves the coupling problem better. The advantage of this control mode is less configuration, external devices do not need to increase, and the effective use of information resources; The disadvantage is that the equipment of the common ring can not be repaired without power failure, unless the two units are stopped for
