Description

GE IS200VCMIH2CAA module

A typical communication failure phenomenon is that all irregular communication on the OVATION side becomes bad points and cannot self heal. Only by restarting a pair of controllers can the failure phenomenon be eliminated. At first, we believed that the OVATION controller CPU was overloaded due to excessive communication points and dense sampling frequency; We have tried to reduce communication points, reduce refresh frequency, refresh the SDB database of the GE CRM operation station, and even allocate communication tasks to two different controller groups, but the fault phenomenon still exists. After repeated experiments, it was found that in addition to physical link interruption (such as unplugging the network cable), there is another situation that can cause the VATION controller to lose response to communication: when the CRM operation station on the MARK VI side performs a REBUILD operation. From the existing data of GE, it is known that the REBUILD of each operation station and engineer station is actually the compilation process of HMB. That is, the engineer changes the M6B configuration file of the MARK VI controller, such as adding EGD points. After the configuration software is compiled, an HMB file is generated, and an independent HMB is distributed for each HMI. The user compiles the HMB file through the REBUILD operation and passes the configuration information to the CIMPLICITY and TCI (turbine control interface) of each HMI station. Thus, new EGD points can be obtained in the CIMPLICITY process screen. So, when the M6B file of the MARK VI controller changes, each HMI station must perform a REBUILD operation. It is worth noting that during the REBUILD process of each CRM station, the system will stop and restart the city and TCI, during which a vacuum period of GSM data packets will be generated. It is also at this time that the OVATION controller encounters a communication failure and refuses to refresh the communication point. It is not difficult to understand why the REBUILD operation produces the same fault phenomenon as link interruption. We know from the relevant Westinghouse documents that the OVATION controller is embedded with a VxWorks operating system similar to U-NIX. The operating system kernel supports TCP/IP protocol, so it can take on the task of receiving GE GSM data packets.

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LC-608
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Additional information

Weight	1.5 kg
Dimensions	350 × 350 × 28 cm