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多选择DSQC679 3HAC028357-001应用工控DCS/PLC系统通讯示教器

The Company:

Spare parts module of PLC and DCS system

 Allen Bradley (American AB) series products

(Modicon Electric) Series Products

 General electric series products

Westinghouse Series Products

Sales of ABB Robots FANUC Robots、YASKAWA Robots、KUKA Robots、Mitsubishi Robots、OTC Robots、Panasonic Robots、MOTOMAN Robots

estinghouse: spare parts for OVATION system, WDPF system and MAX1000 system.

Invensys Foxboro: IA Series system, FBM (field I/O module) sequence control, ladder logic control, accident recall processing, digital analog conversion, I/O signal processing, data communication and processing, etc. Invensys Triconex redundant fault tolerant control system, modern fault-tolerant controller based on triple module redundancy (TMR) structure.

Bosch Rexroth: Indramat, IO module, PLC controller, drive module, etc.

Motorola: MVME 162, MVME 167, MVME1772, MVME177 and other series.

AC 800M supports clock synchronization by four different protocols: CNCP, SNTP, MB 300 Clock Sync, and MMS Time Service. In addition to these, AC 800M also supports the protocol type SNTP on CI for clock sychronization using communication interfaces (CI) that independently function as time master or time slave. The protocol to be used for receiving time is chosen in the Hardware Editor of the Control Builder. AC 800M can send clock synchronization with all protocols simultaneously, but it uses one configured protocol (by the parameter CS protocol type) to receive clock synchronization from another source. Advantage of AC 800M is that it can receive time with a protocol and distributes to other nodes with another protocol, and acts as a router. CNCP is the normal protocol for clock synchronization on the Control Network. An AC 800M controller selected as Clock Master (i.e. with Clock Master Order No>0) multicasts synchronization messages on the network (see Figure 2). All nodes that are configured to receive time with CNCP (CS protocol type = CNCP) is synchronized from the Clock Master. SNTP is a standardized protocol used by AC 800M controllers that need to be synchronized from an external time server which is connected to the Control Network. Set CS protocol type = SNTP to configure AC 800M to be an SNTP client. As SNTP is a simplified version of NTP, both NTP and SNTP servers can be used. To get a good clock accuracy in the AC 800M, an (S)NTP server with high precision should be used. The SNTP server is typically synchronized via a GPS receiver. An SNTP server can typically handle many SNTP clients that receive clock synchronization through GPS. Therefore, all controllers on a control network can use SNTP to be synchronized from the same SNTP server. AC 800M contains an SNTP server that always is enabled. It can be used by other units that need to be synchronized if no external NTP server is used. CNCP and SNTP can both operate at the same time on the network.