If a specific bit in this register is "1", it signifies a warning or an error in the hardware
entity in question.
More specific warning and error codes can be read from elsewhere in
the Modbus memory. See the Modbus memory map for these register
locations.
Table 18:
16-bit SSR1 register
Bit
Meaning
0
Device global warning
1
Device global error
2
Slot 0 (X130) warning or error
3
Slot 1 (X120) warning or error
4
Slot 2 (X110) warning or error
5
Slot 3 (X100) warning or error
6
Slot 4 (X000) warning or error
7...15
0 = not used
3.4.7.2
SSR2
The device mode SSR2 register is located at address 40129. The bit values in SSR2 are
common for all Modbus clients. The bits give an overview of the IED's mode. For
example, bit 6 is activated if the IED's configured time synchronization source is lost.
Table 19:
16 bit SSR2 register
Bit
Meaning
0
Test mode (1= Device is set into test mode)
1...2
Local/Remote states (bit 1= LSB)
00 = Remote – Modbus controls allowed
01 = Station – Modbus controls allowed
10 = Local – Modbus controls not allowed
11 = Off – Modbus controls not allowed
3...5
Active setting parameter setting group (bit 3 = LSB)
001 = Setting group 1
010 = Setting group 2
011 = Setting group 3
100 = Setting group 4
101 = Setting group 5
110 = Setting group 6
6
IED time synchronization failure (1 = Failure)
7
0 = not used
8
Last reset cause (1= Power reset)
9
Last reset cause (1= Watchdog reset)
10
Last reset cause (1= Warm reset)
11...15
0 = not used
1MRS757645 B
Section 3
Vendor-specific implementation
620 series
39
Communication Protocol Manual
