ABB Relion 620 Series Protocol Manual page 59

1MRS757645 B
620 series
Communication Protocol Manual
Different Modbus indications originating from the same IEC 61850
data attribute have an identical UID. It is therefore recommended to
use the Modbus address as the identification instead of the UID.
Data value identification bits 5..0
Coding of the event data value is one bit, two bits or 32 bits. The coding depends on
the IEC 61850 common data class which is the origin of the Modbus data in question.
Table 28: Modbus event value alternatives
Object derived from
IEC 61850 Class
SPS Single Point Status
SPC Single Point Status of a controllable
object
DPS Dual Point Status
DPC Dual Point Status of a controllable
object
ACT Trip status
ACD Start/Pick-up status
INS/INC Integer status
Table 29: Interpretation of the one-bit data value
Register 49261 binary coded value
xxxx.xxxx.xxxx.xxx0
xxxx.xxxx.xxxx.xxx1
Table 30: Interpretation of the two-bit data value
Register 49261 binary coded value
xxxx.xxxx.xxxx.xx00
xxxx.xxxx.xxxx.xx01
xxxx.xxxx.xxxx.xx10
xxxx.xxxx.xxxx.xx11
In case of a DPS/DPC two-bit event value (Data value identification
= 2), the data object ID registers 49259 and 49260 always refer to the
Modbus address or UID of the CLOSE momentary value bit.
Table 31: Interpretation of the integer status data value
Register address
49261
49262
Vendor-specific implementation
Meaning One Bit Data
Value
Meaning
Object in OFF position
Object in ON position
Meaning
Object in intermediate position (changing)
Object in ON (close) position
Object in OFF (open) position
Object in faulty position
Meaning
Higher 16 bit part of the 32 bit integer value
Lower 16 bit part of the 32 bit integer value
Section 3
Two Bit Data 32 bit Data
Value Value
X
X
X
X
X
X
X
53