ProSoft Technology 5201-MNET-101S - Manual (Page 81)

IEC-101 Slave ♦ ProLinx Communication Gateway Reference
IEC 60870-5-101 v3 Slave (Firmware version 3.xx) Protocol Manual
ProSoft Technology, Inc. Page 81 of 159
August 6, 2010
5.2.4 Using Monitor Points
The following monitor points are supported by the 101S gateway:
Symbol Description Data Size in
Database
Addressing
Type
M_SP_NA Monitored Single-Points 1 bit Bit
M_DP_NA Monitored Dual-Points 2 bits Bit
M_ST_NA Monitored Step-Points 1 byte Byte
M_ME_NA Monitored Measured Normalized-Points 1 word Word
M_BO_NA Monitored 32-bit Bitstring Points 2 words Word
M_ME_NB Monitored Measured Scaled-Points 1 word Word
M_ME_NC Monitored Measured Short Floating Points 2 words Double-Word
M_IT_NA Monitored Counter-Points 2 words Double-Word
Each monitor point is identified by its Information Object Address (it should be
unique for each Common ASDU Address in the network). For each monitor point,
configure the following parameters:
Point # - The information object address of the point. It identifies the point in the
network.
DB Address - The database location in the 101S gateway associated with the
point. You must associate each point to a database address in the 101S
gateway. The interpretation of this parameter depends on the point type
configured. For example, for an M_SP_NA point, this value represents the bit
address. For a M_ME_NA point, this value represents the Word address.
Group(s) - This is the group definition for the point. It sets how the point will be
polled by the Master (cyclic or group interrogation). It can also be used to enable
or disable the event generation for one specific point. The group parameter is
discussed in the Data Communication section.
Deadband - Sets the deadband for each Measured point. If the value changes
from more than the configured deadband , the gateway will generate an event for
this point.
IV DB Bit - This feature allows the application to set the invalid (IV) quality bit of
the protocol for all the monitored ASDU types supported. If you enable this
feature, the Master can determine the individual IV quality bit status of each point
you configured.