Ssr3; Ssr4 - ABB Relion 620 Series Protocol Manual

Section 3
Vendor-specific implementation
3.4.7.3
3.4.7.4
40

SSR3

The data available 1 SSR3 register is located at address 40130. The bit values in the
SSR3 register are Modbus client dependent.
Bits 0 and 1 are set to "1" as long as the client in question has not read out the available
Modbus event or fault records.
Bit 4 is set to "1" if any momentary bit has been updated in the Modbus memory map.
The bit is reset when the client reads the register.
Bit 5 is set to "1" if any MCD bit has been set in the Modbus memory map. The bit is
reset when the client reads the register.
Bit 6 is set to "1" to indicate the device restart. The bit is reset when the client reads
this register.
Bit 8 is set to "1" when an event record has been loaded into registers 49252...49262.
The bit is reset when the client writes the reset code 4 to the event record selection
register 49251.
Bit 9 is set to "1" when a fault record has been loaded into registers starting from
49402. The bit is reset when the client writes the reset code 4 to the fault record
selection register 49401.
Table 20: 16 bit SSR3 register
Bit Meaning
0 Unread event records available
1 Unread fault records available
2 0 = not used
3 0 = not used
4 Any MOM bit updated
5 Any indication MCD bit set
6 Device restart bit
7 0 = not used
8 Event record ready for reading
9 Fault record ready for reading
10...15 0 = not used

SSR4

The data available in SSR4 register is located at address 40131. The bit values in SSR4
are Modbus client dependent.
Bits 0...15 in the SSR4 registers correspond to different data categories in the regular
Modbus memory map. Bit 0 corresponds to data category 1, bit 1 to data category 2
and so on.
1MRS757645 B
620 series
Communication Protocol Manual