Echelon DM-21 Device Manager - Manual (Page 102)

A-6 Troubleshooting
7. Configure the new Device Manager shapes using the Device Manger plug-in
as described in Chapter 6.
The Device Manager status LED is flashing four times (No subsystem
selected)
• The network input pins may not have the correct value. If the network input
pin has a value larger than the largest subsystem index in the Device
Manager, then the Device Manager cannot select a subsystem.
• The Device Manager may be attempting to select Subsystem 0, but the Device
Manager 4 bit subsystem selection input configuration property may be
improperly set (see Chapter 6).
The Device Manager takes a long time to select a database
The value of the configuration property MaxSendTime in the Device Manager
L
ON M ARK object may not be 0. This value should be set to 0 in most cases. If the
value is set too high (>50 milliseconds) it will take a long time for the Device
Manager to commission itself. The value should be set to greater than zero only if
the Device Manager is sending messages too quickly and generating too much
network traffic. The highest practical setting is 50 milliseconds.