PID-6194-SETTINGS v5Table 423:LONSPA Non group settings (basic)Name Values (Range) Unit Step Default DescriptionOperation OffOn- - Off OperationSlaveAddress 1 - 899 - 1 30 Slave address13.6.4 Operation principle IP14401-1 v3M11880-3 v2The SPA bus uses an asynchronous serial communications protocol (1 start bit, 7data bits + even parity, 1 stop bit) with data transfer rate up to 38400 bit/s. Formore information on recommended baud rate for each type of IED, refer toTechnical reference manual. Messages on the bus consist of ASCII characters.Introduction of SPA protocol M11880-7 v2The basic construction of the protocol assumes that the slave has no self-initiatedneed to talk to the master but the master is aware of the data contained in the slavesand, consequently, can request required data. In addition, the master can send datato the slave. Requesting by the master can be performed either by sequencedpolling (for example, for event information) or only on demand.The master requests slave information using request messages and sendsinformation to the slave in write messages. Furthermore, the master can send allslaves in common a broadcast message containing time or other data. The inactivestate of bus transmit and receive lines is a logical "1".SPA protocol M11880-10 v5The tables below specify the SPA addresses for reading data from and writing datato an IED with the SPA communication protocol implemented.The SPA addresses for the pulse counter values PCFCNT:1 to PCFCNT:16 arefound in table 424.Table 424:SPA addresses for the PCFCNT functionFunction block SPA address CNT_VAL SPA address NEW_VALPCFCNT:1 6-O-2788 6-O-2787PCFCNT:2 6-O-2794 6-O-2793PCFCNT:3 6-O-2800 6-O-2799PCFCNT:4 6-O-2806 6-O-2805PCFCNT:5 6-O-2812 6-O-2811PCFCNT:6 6-O-2818 6-O-2817PCFCNT:7 6-O-2824 6-O-2823PCFCNT:8 6-O-2830 6-O-2829PCFCNT:9 6-O-2836 6-O-2835PCFCNT:10 6-O-2842 6-O-2841Table continues on next page1MRK 511 424-UEN B Section 13Station communicationBay control REC650 2.2 IEC 547Technical manual
