Events include a normal SPA time stamp, in seconds and milliseconds. The event channel is the Modbus register address on which the indication bit resides. The event code is E0…E31 depending on the bit in the register indication (0…15) and the state into which the indication has changed (0…1).
For example, an event code like 23.543 35E23 means that the event occurred at the time 23.543 and that register 35 bit 11 (23 div 2) changed to value “1” (23 mod 2). Register 35 bit 11 corresponds to bit address 571 (35 × 16 + 11).
If there are several SPA events pending, the interface responds with maximum 5 events every time.