15
8.2
On/Off Cluster
Cluster ID: 0x0006 (6)
Manufacturer ID: 0x0000 (0)
Standard ‘turn on’, ‘turn off’, and ‘toggle’ functionality is provided by the On/Off Cluster.
Attr ID
Attr ID
(Hex)
Attribute Name
Writeable
0
0
Switch State
N
57726
e17e
Switch Safe State
Y
57727
e17f
Switch Safe State Reversion Delay
Y
Safe State Mechanism
If the SS9005 is equipped with a switch there is provision for the switch to be automatically returned
to a specified
safe state
in the event that the device loses contact with the Zigbee network, or if the
ZigBee coordinator indicates that contact with the ESCo has been lost.
There are 5 valid settings for the Switch Safe State attribute:
0.
Switch reverts to Off state with no report.
1.
Switch reverts to On state with no report.
2.
Switch reverts to Off state with report.
3.
Switch reverts to On state with report.
4.
Switch reversion to safe state is Disabled.
The default factory state for Switch Safe State is 4 – Disabled.
There are two conditions which can trigger a safe state reversion:
1.
Loss of ZigBee communications between the meter and the coordinator (e.g. ESBox)
2.
Receipt of a ‘start revert’ command from the ZigBee coordinator (regularly sent to the meter
by the ESBox when the ESBox is unable to communicate with the ESCo)
Following receipt of either one of these signals, the device will wait ‘Switch Safe State Reversion
Delay’ seconds and then set the switch state to the value indicated by the ‘Switch Safe State’
attribute. If ‘Switch Safe State Reversion Delay’ is zero, the switch will revert to safe state
immediately. If the switch is already counting down to revert to safe state, and another ‘revert now’
command is received, the countdown will continue normally (i.e. the countdown is
not
reset).
There are two conditions which can cancel a safe state reversion countdown while it is in progress:
1.
Manually changing the switch state using the front panel button will cause the switch to go
into ‘manual override’ mode and change state immediately, cancelling the safe state
reversion process.
2.
Receipt of a ‘stop revert’ command from the ZigBee coordinator (e.g. ESBox) will cancel the
safe state reversion process.
