Instruction Manual

Power Alarms Corrective Action
Negative power Verify CT orientation toward load.
Phase Loss Check all phase voltages and current.
Low PF Sensor is reading PF<0.5. If not low PF,
ensure voltage legs match with CTs.
Freq out of range Frequency is below the minimum 45Hz or
above the maximum 65Hz.
Voltage out of
Range
Ensure system voltage does not exceed
600VAC.
Current out of
Range
Replace with a larger amperage rated CT.
Neutral Current
out of Range
Ensure desired voltages are being
Monitored.
Frequency
Deviation
Verify the settings for the nominal
frequency and the threshold in the alarm
menu.
Voltage Phase
Loss
No dected voltage on one of more phases.
Pulse Cong
Error
Verify settings and consider increasing the
Wh per pulse setting. User selected pulse
settings violated the maximum duty cycle
of the pulse output (50%), and the pulse
duration setting was adjusted down by the
rmware.
Pulse overrun
error
Verify pulse settings and consider
increasing the Wh per pulse, or decreasing
the pulse duration.
If code is not shown in table above, please contact Senva
technical [e-mail] or [phone]
TROUBLESHOOTING
See below table to diagnose alarms present on EMX.
BACnet/Modbus Quick Reference
The following section outlines some commonly utilized
Modbus registers and BACnet objects for quick reference. For a
complete list and description of each, please see the associated
protocol guides: EM-RS485 BACnet Protocol Guide or EM-RS485
Modbus Protocol Guide.
Description BACnet
Object
Modbus
Register
Unit
L-N Average RMS Voltage AI1 1 Vrms
L-L Average RMS Voltage AI2 2 Vrms
Average RMS Current AI3 3 Arms
Total Real Power AI5 5 W
Total Reactive Power AI6 6 VAR
Total Apparent Power AI7 7 VA
Total Real Energy AI8 kWh
System Power Factor PF
R/S/T Phase RMS Voltage AI11/12/13 8/9/10 Vrms
LN
RS/ST/TR Line RMS Voltage AI14/15/16 11/12/13 Vrms
LL
R/S/T Phase RMS Current AI17/18/19 14/15/16 Arms
R/S/T Phase Power Factor AI20/21/22 17/18/19 PF
R/S/T Phase Real Power AI24/25/26 21/22/23 W
R/S/T Phase Real Energy AI33/34/35 kWh
Pulse Input 1 AI40 #
Pulse Input 2 AI41 #
Supported Modbus Functions:
0x03 Read Holding Registers
0x06 Write Single Register
0x10 Write multiple Registers