3500/32 Enhanced Keyphasor Module

3500/32 by the signal introduced by the interference will cause I / O signal work abnormally and greatly reduce the accuracy of measurement, and in serious cases will cause component damage. For poor isolation performance of the system, will also lead to mutual interference between the signals, resulting in a common ground system bus backflow, resulting in changes in logic data, error and crash. PLC control system due to signal-introduced interference caused by the number of I / O module damage is quite serious, resulting in system failure is also a lot of cases.

3500/32 effective means to improve the electromagnetic compatibility of electronic equipment (EMC), the correct grounding can not only inhibit the impact of electromagnetic interference, but also inhibit the equipment to the outside of the interference; and the wrong grounding but will introduce serious interference signals, so that the PLC system can not work properly.

3500/32 communication starts with a test frame command of one string of characters issued by the host computer to the PLC of the network in turn. In order to make full use of the upper computer CPU time, you can make the upper computer and PLC work in parallel, in the upper computer waiting for the PLC to answer the signal at the same time, so that the CPU to deal with other tasks or threads. After receiving a complete frame from the host computer, a PLC will first judge whether it is its own code, if not, it will ignore it, and if it is, it will send a call answer signal. The host computer to receive the answer signal, and send test data comparison, if the two are not wrong, the signal can be issued for data communication, transfer to normal data communication, otherwise the user is prompted to check the line to re-test or communication failure.