MiCOM P921/P922/P923 - Schneider - error

P92x/EN CM/F22Page 12/26Commissioning GuideMiCOM P921/P922/P9234.2.6 Rear communications portThis test should only be performed where the relay is to be accessed from a remote locationand will vary depending on the communications standard being adopted.It is not the intention of the test to verify the operation of the complete system from the relayto the remote control centre, just the relay's rear communications port and any protocolconverter necessary.The protocol available for remote communication appears on the label on the relay frontpanel (under the top cover).4.2.6.1 Courier communicationsIf a K-Bus to RS232 KITZ protocol converter is installed, connect a portable PC running theappropriate software to the incoming (remote from relay) side of the protocol converter.If a KITZ protocol converter is not installed, it may not be possible to connect the PC to thetype installed. In this case a KITZ protocol converter and portable PC running appropriatesoftware should be temporarily connected to the relay’s K-Bus port. The terminal numbersfor the relay’s K-Bus port are given in Table 5. However, as the installed protocol converter isnot being used in the test, only the correct operation of the relay’s K-Bus port will beconfirmed.ConnectionKBUSModbus or VDEWScreen Screen 301 positive 312 negative 32TerminalTABLE 5: RS485 TERMINALSThe relay's Courier address in the "COMMUNICATIONS" menu must be set to a valuebetween 1 and 255.Check that communications can be established with this relay using the portable PC.4.2.6.2 Modbus communicationsConnect a portable PC (“master station”) running the appropriate Modbus Master Stationsoftware to the relay’s RS485 port via a RS485 to RS232 interface converter. The terminalnumbers for the relay’s RS485 port are given in Table 5.Ensure that the relay address, baud rate and parity settings in the Modbus software are setthe same as on the MiCOM relay (see "COMMUNICATIONS" menu).Check that communications with this relay can be established.4.2.6.3 IEC60870-5-103 (VDEW) communicationsIEC60870-5-103/VDEW communication systems are designed to have a local MasterStation. This should be used to verify that the relay's fibre optic or RS485 port, asappropriate, is working.Ensure that the relay address, baud rate and parity settings in the Master Station softwareare set the same as on the MiCOM relay (see "COMMUNICATIONS" menu).Check that, using the Master Station, communications with the relay can be established.