18.4.2.2 Application M14790-3 v5The IED provides two function blocks enabling several IEDs to send and receive signals via theinterbay bus. The sending function block, MULTICMDSND, takes 16 binary inputs. LON enablesthese to be transmitted to the equivalent receiving function block, MULTICMDRCV, which has 16binary outputs.18.4.2.3 Setting guidelines SEMOD119915-1 v1Settings M14789-4 v3The parameters for the multiple command function are set via PCM600.TheMode setting sets the outputs to either aSteady orPulsed mode.18.5 SPA communication protocol IP14614-1 v118.5.1 Application IP14785-1 v1SEMOD115767-5 v4SPA communication protocol as an alternative to IEC 60870-5-103. The same communication portas for IEC 60870-5-103 is used.When communicating with a PC connected to the utility substation LAN, via WAN and the utilityoffice LAN, as shown in figure 222, and using the rear Ethernet port on the optical Ethernet module(OEM), the only hardware required for a station monitoring system is:• Optical fibers from the IED to the utility substation LAN.• PC connected to the utility office LAN.IED IEDIEDSubstation LANANSI05000715-3-en.vsdRemote monitoringUtility LANWANANSI05000715 V3 EN-USFigure 222: SPA communication structure for a remote monitoring system via a substationLAN, WAN and utility LANThe SPA communication is mainly used for the Station Monitoring System. It can include differentIEDs with remote communication possibilities. Connection to a computer (PC) can be madedirectly (if the PC is located in the substation) or by telephone modem through a telephonenetwork with ITU (former CCITT) characteristics or via a LAN/WAN connection.1MRK 511 358-UUS A Section 18Station communication467Application manual
