NORMAL OPERATION
When powered, the EMCOMMS meter will start up in Normal
Operation. In Normal Operation, there are 4 sets of LEDs that
provide status indications:
CVT Status LEDs
Line Status LED
Device Status LED
y
RS485 Status LED
Figure 13: EMCOMMS Status Indication LED Diagram
The color of each LED will indicate conditions of the system:
Green = Normal
Yellow = Warning: See
Diagnostic Mode
Red = Error: See
Diagnostic Mode
If LEDs
y
are green
(blinking or solid), then there are
no conditions that require diagnostics.
If any of LEDs
y
are yellow
or red
(blinking or solid)
proceed to
Diagnostic Mode
below.
If one or more of your LEDs is blinking:
-CVT Status LEDs
will blink when no load is present
-Device Status LED
will blink when a non-factory default
setting has been selected
-RS485 Status LED
y
will blink to indicate network traffic
DIAGNOSTIC MODE
Diagnostic Mode identifies and displays potential issues causing
one or more of the LEDs
y
to appear yellow
or red
during Normal Operation. Diagnostic Mode is not available if all
LEDs
y
display green
.
CVT Status LEDs
Line Status LED
Device Status LED
Setup Button
y
RS485 Status LED
Figure 14: EMCOMMS Diagnostics LED Diagram
Use
Figure 15: Diagnostic Mode Navigation Flowchart
shown
below along with
Table 1. Diagnostic Codes
to determine
underlying conditions.
Figure 15: Diagnostic Mode Navigation Flowchart
The EMCOMMS Series Meter will return to Normal Operation
after 60 seconds of inactivity, or by manually exiting
Diagnostic
Mode
using
Figure 15: Diagnostic Mode Navigation Flowchart
.
P
Code
2s
DIAGNOSTIC MODE
(if present)
Code
Last Code
(if present)
Press Setup Button
All LEDs
may display
diagnostic codes. Match the LED
location, color and blink pattern to a
condition in Table 1. Diagnostic Codes.
T
o view if any additional codes are
present, press Setup Button
to
advance.
Normal Operation:
If any LEDs
display yellow
or red
a diagnostic code is present
P
2s
P
P
P
P
NORMAL OPERATION
Enter Diagnostic Mode:
Exit Diagnostic Mode:
Hold Setup Button
for 2 seconds
2
1
Setup Bu
�
on
Line Status
LED
Device
Status LED
RS485
Status LED
EMCOMMS
CV
T S
tat
us
LE
Ds
R S T
2
1
Setup Bu
�
on
Line Status
LED
Device
Status LED
CV
T S
tat
us
LE
Ds
RS485
Status LED
R S T
EMCOMMS
DIAGNOSTIC CODES
Diagnostic codes are presented one at at time, using LED
location, color, and sequence to indicate an installation concern.
A diagnostic code will repeat every 3 seconds until the user
proceeds to the next diagnostic code or the meter returns to
Normal Operation.
Table 1. Diagnostic Codes
CVT LEDs
Indication
Corrective Action
Negative power
Verify CVT orientation toward
load
Phase Loss
Check phase voltage and
current
Low power factor
(<0.5)
If not low PF, ensure voltage
legs match with CVTs
Frequency out of
range
Frequency is below 38Hz or
above 150Hz
Over voltage
Ensure system voltage does
not exceed 600VAC
Over current
Replace with a larger
amperage rated CVT
Line LED
Indication
Corrective Action
Mismatched voltag-
es on power sensors
Ensure desired voltages are
being monitored
Not a three phase
system
Verify system type
Reversed Phase
Order
Swap any two CVT meter
inputs if not intentional
Device LED Indication
Corrective Action
Low supply voltage
Ensure voltage to meter is
12-30VDC/24VAC
Temperature
warning
Relocate meter to suitable
environment
y
RS485 LED
Indication
Corrective Action
Noise Warning
Check line terminations, baud
rate settings
Lost Next Master
Allow device to continue
network analysis. Confirm
other devices on network
are communicating properly
(BACnet Only)
No RS485 Traffic
Ensure device is on active
network
Dropped I-HAVE
reply
Allow more time between
WHO-HAS queries
(BACnet
Only)
Detecting Baud Rate Wait for enough network traffic
to auto-detect or manually set
using Edit Settings
Detecting Protocol
Wait for enough network traffic
to auto-detect or manually set
using Edit Settings
Detecting Address
Ensure network has free MS/TP
master addresses
Address Collision
One or more devices have
duplicated addresses
Parity Error
Check connection settings
(protocol, baud rate, serial
format, address)
Framing Error
Check serial formats and baud
rate
Frame Too Large
Program controller for smaller
frames
or indicates a fast blink (200 ms)
or
indicates a slow blink (1 sec)
Figure 16: Diagnostic Codes Table Key
EMCOMMS Series Meter - Installation Instructions
4
