ProSoft Technology 5201-MNET-101S - Manual (Page 41)

IEC-101 Slave ♦ ProLinx Communication Gateway 101S Protocol Configuration
IEC 60870-5-101 v3 Slave (Firmware version 3.xx) Protocol Manual
ProSoft Technology, Inc. Page 41 of 159
August 6, 2010
2.2.5 Parameter Offset
This parameter specifies the IOA (Information Object Address) offset to the
parameter data for the normalized parameter data. The value entered is added to
the Information Object address for the associated point to compute the
parameter IOA address.
The Master may send a "Parameter of Measured Normalized" or "Parameter of
Measured Scaled" command using the parameter IOA in order to change the
deadband values for specific points.
Note: The Low Limit and High Limit values are always calculated based on the deadband value as
described in the following table.
Point Value
Threshold Determined by the deadband set in the configuration file or altered by the write
command.
Low Last reported event value - threshold.
High Last reported event value + threshold.
For example, if the configuration sets two M_ME_NA points with IOA (Point #) of
600 and 601 and an M_ME_NA Parameter Offset value of 3000, it would result in
the parameter points shown in the table.