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pConguration Settings
The EM-RS485 also allows for manual conguration of the
following Setting Groups:
1. Address Assignment
2. Protocol Type Conguration
3. Baud Rate Conguration
4. Serial Format Conguration
5. PowerPrint‘Power Quality Alarm’ Options
This section will further dene the Auto-Detection Settings
and detail alternative settings that can be manually selected
in Section 8 - View and Edit Settings.
Setting 1. Address Assignment
The EM-RS485 is designed to self-address without user
conguration.
BACnet: If the EM-RS485 is connected to a BACnet network,
the meter will analyze the network trac to detect an unused
MAC address. The device will self-assign that MAC address to
the meter. (See Section 6 - Network Connectivity)
Modbus: If the EM-RS485 is connected to a Modbus network,
the meter default address will be between 100-199, based
on the last two digits of the serial number. (See Section 6 -
Network Connectivity)
For manual conguration, the EM-RS485 address can be set
through the network utilizing the EM BACnet Protocol Guide
or EM Modbus Protocol Guide documents or on the meter via
Section 8 - View/Edit Settings.
Manual conguration address options: 1, 10, 77, 101, 149, 192.
If the meter displays‘Other’ in the View/Edit Settings Mode,
the address has been manually assigned via the network.
Setting 2. Protocol Type Conguration
The EM-RS485 is designed to automatically detect and
congure to a BACnet or Modbus protocol. If the meter is
transferred to a new network while in the default Auto-detect
setting, it will recongure the protocol type to match the
new network. Manual conguration of the protocol type is
available via Section 8 - View/Edit Settings.
Manual conguration protocol options: BACnet; Modbus RTU;
BACnet, Modbus RTU; Modbus ASCII; BACnet, Modbus ASCII;
Modbus ASCII, Modbus RTU; BACnet, Modbus RTU, Modbus
ASCII.
Setting 3. Baud Rate Conguration
The EM-RS485 is designed to automatically detect and
congure baud rate. In addition to the default setting for
auto-detection of the baud rate, manual conguration of the
baud rate is available via Section 8 - View/Edit Settings.
Manual conguration baud rate options: 9600, 19200, 38400,
57600, 76800, 115200. If the meter displays‘Other’ in the
View/Edit Settings, the meter has detected or been manually
assigned a baud rate that is not listed above.
Setting 4. Serial Format Conguration
The EM-RS485 includes auto-detection of data bits and parity
of the network. The device will auto format to the correct
setting. Manual conguration of the serial format is also
available via Section 8 - View/Edit Settings.
Manual conguration serial format options: No parity, 8 data
bits (BACnet default); No parity, 7 data bits; Even parity, 8 data
bits (Modbus RTU default); Even parity, 7 data bits (Modbus
ASCII default); Odd parity, 8 data bits; Odd parity, 7 data bits.
If the meter displays‘Other’ in the View/Edit Settings, the
meter serial format has been manually assigned via the
network.
Setting 5. PowerPrint ‘Power Quality Alarm’ Options
PowerPrint is a power quality alarm that enables the meter to
learn and save characteristics of the system being monitored.
Based on recorded values, the meter can provide alarm
conditions and allow user to evaluate system status at a
later time. The PowerPrint setting is o by default. When
PowerPrint is turned on, the meter identies each CVT
connection and saves settings on the following parameters:
1. Which channels have a CVT connected
2. Unique identity of each CVT
3. Phase voltage
4. System frequency
5. Phase voltage angle
PowerPrint can only learn and save characteristics for
channels with a properly installed CVT. If the CVT is displaying
a warning or error condition during Normal Operation, take
the corrective action to resolve the installation error prior to
enabling PowerPrint.
PowerPrint can be enabled through Section 8 - View/Edit
Settings or through the network utilizing the EM BACnet
Protocol Guide or EM Modbus Protocol Guide documents.
Once PowerPrint has been turned on and the system
characteristics have been saved, the conditions below will
be displayed on the meter LEDs as a warning or error during
Normal Operation (See Section 4 - Normal Operation Mode):
Alarm Condition Parameter
Missing sensor CVT missing on one or more channels
Unexpected sensor CVT identity does not match original CVT
saved in Powerprint
Brown out voltage Voltage < 10% from saved voltage
2
Surge voltage Voltage > 10% from saved voltage
2
Frequency drift
1
Frequency not within +/-0.2Hz from saved
frequency
2
Phase drift Phase voltage angle variance > +/-30
o
from
saved angle
2
1
PowerPrint will not monitor frequency variance if system frequency is not
50 or 60Hz when PowerPrint is saved.
2
Parameters are congurable via the network. See the EM BACnet Protocol
Guide or EM Modbus Protocol Guide documents.
PowerPrint Diagnostic Codes: The following codes are
provided in addition to Table 1. Diagnostic Codes in Section 5 -
Diagnostics with PowerPrint On:
Table 3. PowerPrint Diagnostic Codes
CVT LEDs Indication Corrective Action
Missing sensor Reconnect original CVT to meter
Unexpected sensor Reconnect original CVT to meter
Brown out voltage Verify system voltage
Surge voltage Verify system voltage
Line LED Indication Corrective Action
Frequency drift Verify system voltage
Phase drift Verify system voltage
In addition to the LED indicators above, the PowerPrint
can also be evaluated over the network. See the EM BACnet
Protocol Guide or EM Modbus Protocol Guide documents.
