E-Mon E-PS-E-RTU-N - Manual (Page 106)

Chapter 5 Configuring the PowerSmart+ PQM Configuring Communication Protocols
106 PowerSmart+ Power Quality Meter
Parameter Options Default Description
Binary Counters (BC)
Binary Counter Object 32-bit+Flag
32-bit–Flag
16-bit+Flag
16-bit–Flag
32-bit-Flag The default BC object variation for
requests with qualifier code 06 when no
specific variation is requested
DNP General Options
16-bit AI Scaling Disabled
Enabled Enabled Allows scaling 16-bit analog input
objects (see description below)
16-bit BC Scaling x1, x10,
x100, x1000 x1 Allows scaling 16-bit binary counter
objects (see description below)
SBO Timeout 1 2-30 sec 10 Defines the Select Before Operate (SBO)
timeout when using the Control-Relay-
Output-Block object
Time Sync Period
2 0-86400 sec 86400 Defines the time interval between
periodic time synchronization requests
Multi Fragment
Interval 50-500 ms 50 Defines the time interval between
fragments of the response message
when it is fragmented
Scaling 16-bit AI objects
Scaling 16-bit AI objects allows accommodating native 32-bit analog input
readings to 16-bit object format; otherwise it may cause an over-range
error if the full-range value exceeds a 16-bit point limit.
Scaling is enabled by default. It is not related to points that are read using
32-bit AI objects.
Refer to the PowerSmart+ PQM DNP3 Reference Guide for information on
the data point scales and a reverse conversion that should be applied to
the received scaled values.
Scaling 16-bit Binary Counters
Scaling 16-bit Binary Counters allows changing a counter unit in powers of
10 to accommodate a 32-bit counter value to 16-bit BC object format.
If the scaling unit is greater than 1, the counter value is reported being
divided by the selected scaling unit from 10 to 1000. To get the actual
value, multiply the counter reading by the scaling unit.
Configuring DNP Class 0 Responses
The most common method of getting static object information from the
meter via DNP is to issue a read Class 0 request. The PowerSmart+ PQM
allows you to configure the Class 0 response by assigning ranges of points
to be polled via Class 0 requests.
To view or build a DNP Class 0 response message:
1. Select Protocol Setup from the Meter Setup menu and click
on the DNP Class 0 Points tab.
2. Select the object and variation type for a point range.
1 The Select Before Operate command causes the meter to start a timer. The
following Operate command must be sent before the specified timeout value
expires.
2 The meter requests time synchronization by bit 4 in the first octet of the
internal indication word being set to 1 when the time interval specified by the
Time Sync Period elapses. The master should synchronize the time in the meter
by sending the Time and Date object to clear this bit. The meter does not send
time synchronization requests if the Time Sync Period is set to 0.