Talgil Computing and Control LTD RF-MODULE-45 사용자 설명서
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4.3
SETTING THE DREAM FOR READING RF ANALOG INPUTS
For being able to read analog inputs through the RF RTU system the DREAM host
controller must have the following definitions made:
1. At the NETWORK DEFINITION stage the number of analog inputs must be
declared.
2. At the HARDWARE DEFINITION stage a virtual ANALOG INTERFACE must
be declared and given an address that is higher by 1 than the address of the
RF INTERFACE through which the analog values will be transmitted.
RF INTERFACE through which the analog values will be transmitted.
3. At the CONNECTION DEFINITION stage the analog inputs must be defined
as connected to a virtual analog RTU belonging to the channel of the virtual
analog interface but with the same RTU number as the RF RTU to which the
analog input is really connected.
analog interface but with the same RTU number as the RF RTU to which the
analog input is really connected.
4. The RF RTU to which the analog input is connected must have at least 1
output and 1 digital input allocated to. If such allocation does not really exist,
a dummy output and a dummy digital input must be defined and allocated to
the specified RTU.
a dummy output and a dummy digital input must be defined and allocated to
the specified RTU.
5. At the UTILITIES/ANALOG-SENSORS definition the type of each analog
sensor and its scale range should be defined.
The resolution of the analog inputs is 16 bits and they are transmitted
in nibbles of 4 bits per cycle, therefore it takes 4 cycles of
communication to transfer the value of a single analog input and if
there are 4 analog inputs connected to the same RTU it may take at
least 16 communication cycles to transfer 4 analog inputs. If a nibble
was not successfully received by the MASTER it will be requested
again on the next communication cycle.
in nibbles of 4 bits per cycle, therefore it takes 4 cycles of
communication to transfer the value of a single analog input and if
there are 4 analog inputs connected to the same RTU it may take at
least 16 communication cycles to transfer 4 analog inputs. If a nibble
was not successfully received by the MASTER it will be requested
again on the next communication cycle.
5.
USING RFPROG FOR PROGRAMMING THE RTU
By use of the RFProg (special software for programming the RF RTU) the following
parameters of the RF RTU can be set:
Parameters involved with the analog inputs
Parameters involved with the solenoids activation pulse
Parameters involved with the input pulses division
Parameters involved with the Auto-close in case of losing communication
Parameters involved with the solenoids activation pulse
Parameters involved with the input pulses division
Parameters involved with the Auto-close in case of losing communication
To prepare for programming the RTU base must be energized by 6-12 volts and
must be put into “programming mode” by holding down the TEST button (SW7) and
then pushing the RESET button (SW2). Being in programming mode is indicated by
a single beep (and single blink
) every 6 seconds. Make sure that the RTU
address is set to a nonzero value. When programming a modular RF RTU the
connector of the cable between the Slave and the Executer must be pulled out.
connector of the cable between the Slave and the Executer must be pulled out.