hibernation/
storage mode
While in
storage mode
, the radio does not operate. To put any integrated battery Sure Cross
®
radio into
storage mode, press and hold button 1 for five seconds. To wake the device, press and hold button 1 for
five seconds. The radio is in storage mode when the LEDs stop blinking, but in some models, the LCD
remains on for an additional minute after the radio enters storage mode. After a device has entered
storage mode, you must wait one minute before waking it.
For the Wireless Q45 and Q120 Sensors: While in
storage mode
, the device's radio does not operate,
to conserve the battery. To put any device into storage mode, press and hold the binding button for five
seconds. The device is in storage mode when the LEDs stop blinking. To wake the device, press and
hold the binding button (inside the housing on the radio board) for five seconds.
hop
As a verb, hopping is the act of changing from one frequency to another. As a noun, a hop is the device
to device transmission link, such as from the Master device to the Slave device.
hop table
A hop table is a precalculated, pseudo-random list of frequencies used by both the transmitter and
receiver of a radio to create a hopping sequence.
hysteresis
Hysteresis defines how far below the active threshold (ON point) an analog input is required to be before
the input is considered OFF. A typical hysteresis value is 10% to 20% of the unit’s range. For more
specific details, see
Threshold
.
Threshold
ON point
Time
Input V
alue
Input
Hysteresis
OFF point
Industrial,
Scientific, and
Medical Band
(ISM)
The ISM, or Industrial, Scientific, and Medical band, is the part of the radio spectrum that does not
require a license for use. The Sure Cross radios operate in the ISM band.
latency
A network's latency is the maximum delay between transmission and reception of a data signal.
lightning
arrestor
Also called a lightning suppressor, surge suppressor, or coaxial surge protection, lightning arrestors are
used in remote antenna installations to protect the radio equipment from damage resulting from a
lightning strike. Lightning arrestors are typically mounted close to the ground to minimize the grounding
distance.
line of sight
Line of sight is the unobstructed path between radio antennas.
link failures
A
Host Link Failure
occurs when the defined timeout period, typically about four seconds, elapses with
no communication between the host system (or Modbus master device) and the DX80 Gateway.
A
Gateway Link Failure
refers to the radio link between a Node and the Gateway and is determined by
three global parameters: Polling Interval, Maximum Missed Message Count, and Re-link Count. When
the Node’s Gateway Link Failure flag is set and the Gateway determines a timeout condition exists for a
Node, any outputs linked from the failing Node are set to the user-defined default state.
A
Node Link Failure
is determined by the polling interval or the out-of-sync timing. When a Node
detects a communications failure with the Gateway and the Node Link Failure flag is selected, the output
points are set to the user-defined states and the inputs are frozen.
Sure Cross
®
DXM100-Sx Wireless Modbus Slave
48
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