Echelon DM-21 Device Manager - Manual (Page 72)

5-20 Installing and Getting Started with the Device Manager Software
power-up Manager to go unconfigured. This feature provides a
means of placing the Device Manager in a known
state. To cause the Device Manager to go
unconfigured, power off the Device Manager, press
and hold the service pin, and then power on the
Device Manager while still holding the service pin.
After the number of seconds defined by this
configuration property, the Device Manager will
enter the unconfigured state. Setting this value to 0
disables this feature.
Service pin time to force
unconfigured state in
general
Similar to the functionality described above except
that power cycling the Device Manager is not
required force the unconfigured state. Simply press
and hold the Device Manager service pin for the
number of seconds defined by this configuration
property to cause the Device Manager to enter the
unconfigured state. Setting this value to 0 disables
this feature.
Minimum delay between
messages
The delay in milliseconds inserted between all
messages the Device Manager sends on the network.
This feature is useful in situations where it is
necessary to limit the bandwidth used by the Device
Manager by inserting a delay between each
message.
The cumulative effect of this parameter is
significant. For example, assume that it requires 20
to 100 messages to discover and commission a single
device. If the minimum delay between messages is
set to 100ms, and it requires 50 messages to
commission a device, 5 seconds will be added to the
commissioning time of each device. In a network of
30 devices, this delay will add at least two minutes of
additional overhead. Generally this parameter
should be set to zero to allow the Device Manager to
operate as quickly as possible.
DM Pin Usage DM Pin Usage determines how the Device Manager’s
subsystem selection IO pins are used. Setting this
property to
Use subsystem 0
tells the Device
Manager that it will be loaded with a managed
device list that contains a single subsystem. The
Device Manager will always apply this subsystem to
the network. Setting this property to
Use IO Pins
as DB number
tells the Device Manager that it will
be loaded with a managed device list that contains
several subsystems and that the Device Manager
should read its 4-bit subsystem selection input to
determine which subsystem to apply to the network.
See Chapter 4 for more information on the 4-bit
subsystem selection input feature.