Bringing the Benefits of Real-Time Data Collection to the World
Sutron Corporation, 22400 Davis Drive, Sterling, Virginia 20164
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6.
Troubleshooting and Maintenance
Troubleshooting
The following checklist will help in troubleshooting problems:
Problem
Possible Cause
No response
from
module
(PC config)
Ensure that the module is powered and the baud rate and
parity are correctly set on the PC side
Unable to query
remote Modbus
sensor
Ensure that the Modbus baud, parity settings on the
sensor/logger and the ModbusLink-S/ModbusLink-M are
identical
Ensure that the Modbus Device (Rs232/RS485) settings are
correct
If using Static address’ ensure that the address assigned to
the slave matches the address of the Modbus sensor
If using automatic address mode, ensure that the Modbus
sensor is powered and connected to the ModbusLink-S
module before powering it up. Power cycle the
ModbusLink-S module.
Ensure that all the modules have the same Network ID
Ensure that the Antenna is properly secured
Intermittent lost
data
Ensure that the Antenna is properly secured and that LOS
link is available between the node and its neighbor
Nw Scan
reports the
Node address as
a large junk
/negative
number
The Node has been configured in automatic address mode
and was unable to find a Modbus sensor connected to it.
Maintenance
Maintenance of the unit should be performed at regular intervals which are dependent upon the conditions of
use. Typical maintenance for the unit consists of checking the wiring to make sure it is not corroded or
frayed and examining the unit to ensure that there is no physical damage.
