ADLINK Technology HSLink HSL-DI32 User Manual

ADLINK Technology HSLink HSL-DI32 User Manual Manual pdf 11 page image

HSLink Introduction • 3ÿ Modular design of slave I/OAll kinds of slave I/O module are mechanically of the same size and followthe identical connecting PIN assignment. To fit into various wiring situationsto keep flexibility, the HSLink Terminal Base is introduced. HSLink TB actsas an carrier of salve I/O module with wiring function. The Ethernetconnector and screw terminal on HSLink TB makes it easier for users toreplace I/O module without power off and wire off when necessary.ÿ Easy to programEvery HSLink master card is equipped with 4K SRAM, and it is the 4K SRAMthat carries all the I/O status information of this HSLink system. The ASIC onevery HSLink master card takes charge of communication with all remoteslave I/O modules at constant scanning period and keeps the most updatedI/O status information in the SRAM. What users do is to read and writethrough PCI bus the data in the 4K SRAM on HSLink master card. So, noprotocol is needed.1.1.3 Application of HSLinkÿ HSLink as Distributed PLCFirst we review the evolution history of distributed PLC:In the past decades, PLC had token an important character in the field ofindustry automation. With the help of communication modules, such asRS232, RS485, PLC could also perform distributed control. The traditionalarchitecture of distributed PLC application is showed at Figure 1.2, in whichthe MPC take the character of medium for data transmission from field toMIS.Figure 1.2: Tradition architecture of distributed PLC