1. Set the operation of the rear SPA/IEC port to “IEC”.The operation of the rear SPA/IEC port can be found on the local HMI underMain menu/Configuration/Communication/SLM configuration/Rearoptical SPA-IEC-DNP port/PROTOCOL:1When the setting is entered the IED restarts automatically. After the restart theselected IEC port operates as an IEC port.2. Set the slave number and baud rate for the rear IEC port.The slave number and baud rate can be found on the local HMI under Mainmenu/Configuration/Communication/SLM configuration/Rear opticalSPA-IEC-DNP port/IEC60870–5–103Set the same slave number and baud rate as set in the IEC master system for theIED.6.2 Verifying the communicationTo verify that the rear communication with the SMS/SCS system is working, there aresome different methods. Choose one of the following.6.2.1 Verifying SPA communicationProcedure1. Use a SPA-emulator and send “RF” to the IED. The answer from the IED shouldbe the type and version of it, for example, “REL670 2.1...”.2. Generate one binary event by activating a function, which is configured to anevent block where the used input is set to generate events on SPA. Theconfiguration must be made with the PCM600 software. Verify that the event ispresented in the SMS/SCS system.During the following tests of the different functions in the IED, verify that the eventsand indications in the SMS/SCS system are as expected.6.2.2 Verifying IEC communicationTo verify that the IEC communication with the IEC master system is working, thereare some different methods. Choose one of the following.ProcedureSection 6 1MRK 511 360-UEN AEstablishing connection and verifying the SPA/IEC communication58 Bay control REC670 2.1 IECCommissioning manual