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WND-WR-MB-Inst-1.03
4.3 Modbus Communication LED
Near the upper left corner, there is a diagnostic
Com
(communication) LED that can indicate the
following:
●
Green Off
A short green flash indicates a valid packet addressed to this device.
●
Yellow Off
Short yellow flashes or rapid flashing indicate valid packets addressed to differ-
ent devices.
●
Red
A one second red flash indicates an invalid packet: incorrect baud rate, bad
CRC, noise, incorrect parity, etc.
●
Y
R
Y
R
Y
R
Rapid red/yellow flashing indicates a possible address conflict (two de-
vices with the same DIP switch address).
●
Red
Solid red indicates the address is set to zero: an invalid choice.
4.4 Monitoring
The WattNode Wide-Range Modbus meter models communicate measurements over a Modbus
RTU network. The measurements include: energy, power, voltage, current, line frequency, power
factor, reactive power, and demand.
In order to monitor and configure networked WattNode models, you will need an appropriate moni-
toring solution, either standalone or PC software.
See the
for a complete list of network accessible variables.
4.5 Maintenance and Repair
The WattNode meter requires no maintenance. It is not user serviceable and there are no replace-
able parts except the pluggable screw terminals. There are no diagnostic tests that can be per-
formed by the user, other than checking for errors via the Modbus interface or the status LEDs.
In the event of any failure, the meter must be returned for service (contact CCS for an RMA). For a
new installation, follow the troubleshooting instructions in the
the meter for service, to ensure that the problem is not connection related.
The WattNode meter should not normally need to be cleaned, but if cleaning is desired, power must
be disconnected first and a dry or damp cloth or brush should be used.
5 Specifications
The following is a list of basic specifications. For extended specifications, see the
.
5.1 Measurement
Update Rate:
0.1 second. Internally, all measurements are performed at this rate, except the en-
ergy registers, which are updated every 1.0 second.
Start-Up Time:
≤ 1 second after the supply voltage is applied.
Default CT Phase Angle Correction:
0.0 degrees.
5.2 Electrical
Nominal Power Supply Voltage:
100 to 600 Vac
Power Supply Input Terminals:
V
N
,
V
A
, and
V
B
(the meter supply can operate line-to-neutral or
line-to-line)
Power Supply Minimum Operating Voltage:
85 Vac
Power Supply Absolute Maximum Voltage:
690 Vac. Exceeding this limit can damage the
WattNode and void the warranty.
Power Supply Watts:
typical 1.0 W, maximum 2.5 W
Power Supply Voltage-Amperes:
≤ 20 mA
