Solution of time synchronization system in chemical plant

The terminal equipment time of each chemical plant is not uniform, due to the problem of clock synchronization during the operation of the front-end computer control system and the central control operating system, especially when an accident occurs during the production process, analyze the first accident in the accident process The time requirement is particularly important, at this time it seems that the time synchronization system is particularly important.
Site requirement
according to the actual situation, the regional control system network (network security, information network, etc.) generally categorized as follows: Network Security Network, DCS system network, PLC network system, MES systems and power monitoring network network, each network system has N Every computer or device wants to synchronize time.
It is now hoped that all computer time and network equipment time in each system network can be adjusted to the clock error level of milliseconds. Since each subsystem is an independent system, the time synchronization of each system device can be achieved through one or more time service servers.
Solution
The basic idea of ​​the solution is to install a time server in the building that can install the satellite time service system and antenna according to the time synchronization requirements of each network system to form an independent time synchronization network. The GPS or Beidou signals received by the time server are used as The standard clock source provides time to each of the above independent networks through the server network output interface to achieve time synchronization. According to the situation on site and the needs of users, the product model is tentatively set as: SYN2151 type time synchronization server.
Network topology

product introduction
SYN2151 time synchronization server . The server has a built-in Beidou dual-mode time service module, uses GPS / Beidou signals as the time reference, and synchronizes all computers, servers, DVRs, NVRs, controllers and other devices in the network with the NTP / SNTP protocol to achieve unified network time.
SYN2151 type time synchronization server selects high precision GPS receiver / Beidou II receiver signal input, provides high reliability time reference signal, and adopts high-tech operation method, so that the time synchronization signal output by the punctual circuit is precisely synchronized in GPS / On the Beidou input time base, it outputs high-precision synchronization signals with excellent short-term and long-term stability.
The time server uses modern high-tech tame algorithms to keep the frequency signal in the oscillator and the satellite in high-precision frequency / time synchronization. Because the BNC output second pulse time signal output from the time server is the second signal output of the oscillator, it is synchronized with the satellite signal but is not affected by the jump of the satellite second pulse signal.
This clock server is produced with modern high-tech surface mount technology, no hard disk design, is not limited by regional climate and other environmental conditions, high cost performance, simple operation, maintenance-free and other characteristics, suitable for unattended. This product can provide precise standard time signal and time stamp service for smart devices such as computer networks, computer application systems, process control management systems, e-commerce systems, online B2B systems, database storage and maintenance, and hard disk recorders.
The satellite time service system is a time service system built for the short wave transmitter room PowerTBH system, the antenna feeder automatic switching system, the transmitter room control desk time monitoring, and the transmitter control system for time correction. The system can obtain accurate time signals from GPS satellites to achieve The unity and accuracy of the entire system time in the shortwave transmitter room. The satellite receiving antenna has lightning protection design, stable operation, super anti-interference ability, and strong signal reception reliability.
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