External Meter Interface
–
ZHEMI-101
–
Technical manual
Develco Products A/S
Olof Palmes Allé 40
http://develcoproducts.com
DK-8200 Aarhus N
18
6
General network behaviour
6.1
Installation
When the device is virgin and powered for the first time it will start looking for a ZigBee PAN Coordinator or router
to join. The device will scan each ZigBee channel starting from 11 to 26. The LED will flash once every second until
it joins a device.
#Scan mode - 1
Scan all 16 ZigBee
channel until join
network or 15
minutes
#Sleep mode
MCU is in sleep
mode (Radio off)
15 minutes
#Scan mode - 2
Scan all 16 ZigBee
ch x 4 or until join
network
~ 2 minutes
#Sleep mode
MCU is in sleep
mode (Radio off)
15 minutes
#Scan mode - 2
Scan all 16 ZigBee
ch x 4 or until join
network
~ 2 minutes
The device will start up using scan mode 1. To increase battery lifetime when the device is joining a network for
the first time a scan mode 2 will be used after scan mode 1 has expired. Scan mode 1 it will only be executed one
time when the devise is powered.
In section 5 “MMI” it is explained how to put the device into a join or leave network mode.
Network settings are stored in NV-memory are after a power cycle the device re-join the same network.
If the device has to join a new PAN coordinator t
he MMI menu supports a “
Reset To Factory Fresh Settings
”
mode.
This will erase all current network information.
6.2
Normal
–
Keep alive
The device is sending a “keep alive” message to the PAN coordinator every 15 minute to verify that the device is
still connected to the network.
6.2.1
Network lost
If the devices loss connection with the Coordinator it will start scanning every ZigBee channel for the PAN
coordinator and try to re-join it. After scanning all 16 channels 4 times in a row the device will enter sleep mode.
The device will toggle between each mode until a re-join occur.
When the device is in scan mode the LED will flash once every second until it re-joins the network.
