DSLC Digital Synchronizer and Load Control
Manual 02007
90
Woodward
NOTE
If Network Address cannot be changed as indicated by its reverting to some
other value after saving set points, this indicates that a LonWorks network
management tool has been used to do a custom network installation. If all
DSLC control addresses are unique and contain values between 1 and 16,
then the installation has probably been done correctly. If an address greater
than 16 is obtained on any unit, custom installation has not been done
correctly, and you should do an installation that results in all DSLC control
addresses between 1 and 16.
If
Active DSLCs
still indicates the wrong value after all addresses are verified,
refer to the
Active DSLCs
information noted when checking each of the units.
The following are the most probable causes:
1. If one unit indicates one active DSLC control and the other units indicate the
number is one less than the actual number of units installed, verify the
wiring to the DSLC control reporting one active unit. Replace that DSLC
control if necessary to correct the problem.
2. If one or more units indicate some number less than the correct value,
power down one DSLC control at a time (or carefully disconnect the network
wires from each DSLC control, one at a time) to observe its effect on the
other units' Active DSLCs values. If DSLC controls on far ends of the
network are determined not to be in communication with each other, do the
tests described below under Installation Verification below.
If
Active DSLCs
still indicates the wrong value after doing the above steps,
continue with the tests described below under Neuron Status.
Neuron Status
“Neuron Status” is a set of data that may be retrieved at any time by pressing the
“.” key on the Hand Held Programmer. This action causes the Echelon Neuron
network communications processor to read its status registers and pass this
information to the main processor so that it may be observed on the Hand Held
Programmer.
NOTE: It is not necessary to have the Menu 0
Retrieve Net Status
set point
displayed when retrieving network status. All status registers are also cleared
when status is retrieved. The information displayed has been accumulated since
the control was powered up or status was last retrieved. The following
information can be used to determine if the DSLC control is operating correctly.
Menu 0
Transmit Errors
is a communications accuracy test. Errors result from
message collisions and weak or noisy signals. The number of errors from
message collisions is a function of the number of messages presented to the
network. More than five or ten errors per hour indicates the network function
should be checked.
1. If the network being used by the DSLC controls for load sharing is heavily
loaded with other non-load sharing devices, separate the network used by
the DSLC controls and their associated devices from the other devices.
Routers may be used if necessary to communicate between the separated
networks.
2. Verify network wiring installation is to specifications.