Talgil Computing and Control LTD RF-MODULE-45 사용자 설명서
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2.4.5 Functions of the jumpers
JP5
- When in the upper position, the buzzer is enabled.
JP15
- When set to the upper position, a request for RF testing mode is sent to the
DREAM controller. (see paragraph 3.3 below about the RF test mode).
3.
THE VARIOUS MODES OF OPERATION
3.1
START-UP MODE
Right
after energizing the RTU or after pushing it's reset button there is an
initialization process that starts with a sequence of 3 short and one long beeps
after which the solenoids are closed one by one. Every 15 seconds 2
short beeps
will be sounded and every 30 seconds the slave will try to acquire
communication with the MASTER. During the process of acquiring communication
the red LED
the red LED
of the SLAVE turns on indicating that the receiver is open and
listening. This takes about 10 seconds. If the communication is established, the
RTU goes into NORMAL MODE, otherwise it will keep trying to pick up the
communication signal every 30 seconds.
RTU goes into NORMAL MODE, otherwise it will keep trying to pick up the
communication signal every 30 seconds.
3.2
NORMAL MODE
During normal mode of operation, the RTUs are scanned by the host via the
MASTER one by one in a cyclic manner and in a constant rate. In each cycle, every
RTU is communicated within its allocated timeslot, which is dictated by its address.
During that timeslot, an information exchange takes place, the required state of the
outputs is sent from the host controller to the RTU, and the current state of inputs is
transmitted back to the host controller. The rate of scanning must be identically set
both at the host controller and at each RTU. When the MASTER initiates a
scanning cycle there will be a blink of the MASTER's LED
MASTER one by one in a cyclic manner and in a constant rate. In each cycle, every
RTU is communicated within its allocated timeslot, which is dictated by its address.
During that timeslot, an information exchange takes place, the required state of the
outputs is sent from the host controller to the RTU, and the current state of inputs is
transmitted back to the host controller. The rate of scanning must be identically set
both at the host controller and at each RTU. When the MASTER initiates a
scanning cycle there will be a blink of the MASTER's LED
and for each response
received correctly from any RTU, there will be a short beep
sounded by the
MASTER's buzzer.
At the other end the RF SLAVE which is dormant between the scanning cycles,
wakes up at the right timeslot and prepares itself for receiving the transmission of
the MASTER. This state is indicated by a blink of the SLAVE's LED
At the other end the RF SLAVE which is dormant between the scanning cycles,
wakes up at the right timeslot and prepares itself for receiving the transmission of
the MASTER. This state is indicated by a blink of the SLAVE's LED
.
Each time a
successful information exchange takes place there will be a short beep sound
made by the buzzers of both the RTU BASE and the RF SLAVE. If the RTU picks
up the signal from the MASTER but the call was not correctly addressed, it will
sound a double beep
sound a double beep
. For those who have difficulty hearing the buzzer, the
green LED
blinks each time the buzzer sounds.
3.3
RF TEST MODE
The purpose of this test is to check the communication quality between a specific
RTU and the MASTER. Prior to initiating the TEST mode, it must be enabled at the
host controller. When enabled, the request for RF TEST is initiated from the RTU.
By setting JP15 to "RF test" (upper position) a test request signal is sent to the
Master. When the request is received by the MASTER, it is immediately granted
and the RF test starts. During RF TEST mode the regular scanning of all the RTUs
is stopped and the MASTER starts communicating solely with the RTU under test
RTU and the MASTER. Prior to initiating the TEST mode, it must be enabled at the
host controller. When enabled, the request for RF TEST is initiated from the RTU.
By setting JP15 to "RF test" (upper position) a test request signal is sent to the
Master. When the request is received by the MASTER, it is immediately granted
and the RF test starts. During RF TEST mode the regular scanning of all the RTUs
is stopped and the MASTER starts communicating solely with the RTU under test