glossary:glossary_r
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glossary:glossary_r [2015/01/09 02:36] – [RPI] minor format change Wayne | glossary:glossary_r [2023/06/16 06:52] – [RailCom] michael_smith | ||
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===== RailCom ====== | ===== RailCom ====== | ||
- | |||
A relatively new DCC standard to implement return messages from a train/ | A relatively new DCC standard to implement return messages from a train/ | ||
- | RailCom works by having the command-station/ | + | RailCom works by having the command-station/ |
- | RailCom/ | + | An example of RailCom Channel 1 detectors are shown here [[projects: |
+ | |||
+ | RailCom/ | ||
- | ===== RC filter ====== | + | ===== Raspberry Pi ===== |
+ | [[https:// | ||
+ | |||
+ | Two current models of single board computer running LINUX based system with several development environments... | ||
+ | |||
+ | Pi Zero (aka Pi0) | ||
+ | 1 GHz single-core CPU, 512 MB RAM, HDMI, USB and 40 pin GPIO (~ £4) | ||
+ | |||
+ | Pi 3 B (aka Pi3) | ||
+ | 1.2 GHz quad-core CPU, 1 GB RAM, Ethernet, Wireless, Bluetooth, HDMI, 4 x USB and 40 pin GPIO (~ £35) | ||
+ | |||
+ | |||
+ | ===== RC filter ====== | ||
A resistance and capacitor network to limit a particular frequency | A resistance and capacitor network to limit a particular frequency | ||
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===== Rectification ====== | ===== Rectification ====== | ||
- | |||
The process of converting alternating current (AC) to direct current (DC). most offten using diodes. The diodes are commonly arranged in a set of 4 combined in one package. See also " | The process of converting alternating current (AC) to direct current (DC). most offten using diodes. The diodes are commonly arranged in a set of 4 combined in one package. See also " | ||
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===== Resistor ====== | ===== Resistor ====== | ||
- | + | Resistor is the name for an electronic component | |
- | Resistor is the name for an electronic component | + | |
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===== Resonator ====== | ===== Resonator ====== | ||
- | |||
A device used to produce an oscillation of a specific frequency, primarily for use as the clock signal for digital circuits. | A device used to produce an oscillation of a specific frequency, primarily for use as the clock signal for digital circuits. | ||
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===== Reverse polarity ====== | ===== Reverse polarity ====== | ||
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The Positive voltage goes to the Negative part of a circuit and vice versa. | The Positive voltage goes to the Negative part of a circuit and vice versa. | ||
+ | |||
+ | |||
+ | ===== RFC ===== | ||
+ | |||
+ | Request for Comment is a way of making a suggestion for a change to some standard or way of working. It is used within MERG for discussion of changes to the CBUS protocol. | ||
===== RFID ===== | ===== RFID ===== | ||
+ | |||
**R**adio **F**requency **ID**entification\\ | **R**adio **F**requency **ID**entification\\ | ||
- | [[http:// | + | [[wp>/RFID|Wikipedia: RFID]]\\ |
- | [[http:// | + | [[glossary: |
- | ===== Risk assessment ====== | + | **MERG RFID systems**\\ |
+ | The tags generally used in MERG RFID systems have a 40 bit ID number, that is 5 bytes, when transmitted there is then a sixth byte added which is a checksum for data integrity. The tag readers transmit the data over a serial link using [[glossary_h# | ||
+ | The MERG Concentrator replaces the STX with a reader identification letter, A to H or I to P. For CBUS the incoming data is converted back to its original 5 bytes and checked against the checksum. These 5 bytes are then transmitted as bytes 3 to 7 of an 8 byte message. < | ||
+ | |||
+ | ===== Risk assessment ====== | ||
An analysis of the risks and the method of management in a strategy or practice. | An analysis of the risks and the method of management in a strategy or practice. | ||
- | ===== RMS ====== | + | ===== RLSC ====== |
+ | Reversed Linked Section Control is a method for the control of the switching of DC power to sections of track on a model railway layout. | ||
- | Root Mean Square. This is what you read on an analogue meter used on AC voltage. It compares to the dc level. So it’s an average value.[[https:// | ||
+ | ===== RMS ====== | ||
- | ===== Road Vehicle Control ====== | + | Root Mean Square. This is what you read on an analogue meter used on AC voltage. It compares to the dc level. So it’s an average value.[[wp> |
+ | |||
+ | ===== Road Vehicle Control ====== | ||
Usually refers to a electronic system to control model road vehicles. | Usually refers to a electronic system to control model road vehicles. | ||
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===== Route setting ====== | ===== Route setting ====== | ||
- | |||
This is used when you operate a set of instructions to drive a train from A>>> | This is used when you operate a set of instructions to drive a train from A>>> | ||
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===== RPC ====== | ===== RPC ====== | ||
- | + | Remote Panel Control. RPC System - Remote Panel Interface ([[glossary: | |
- | Remote Panel Control. RPC System - Remote Panel Interface (RPI) \\ (RS232 Single Unit PC Interface Module) Includes PCB and all components | + | |
===== RPI ====== | ===== RPI ====== | ||
- | + | Remote Panel Interface. | |
- | Remote Panel Interface. RPC System - RPI. \\ Serial interface module for PC control. RS485 Multi-Drop version. Includes PCB and all components. a MERG system \\ [[rpcsystem|Main article]] | + | |
===== RS232 ====== | ===== RS232 ====== | ||
- | |||
It is commonly used in computer serial ports. Is a standard for serial binary data signals connecting between a DTE (Data terminal equipment) and a DCE (Data Circuit-terminating Equipment) | It is commonly used in computer serial ports. Is a standard for serial binary data signals connecting between a DTE (Data terminal equipment) and a DCE (Data Circuit-terminating Equipment) | ||
+ | [[wp> | ||
===== RS485 ====== | ===== RS485 ====== | ||
- | + | It is commonly used in computer serial ports. RS485 enables the configuration of inexpensive local networks and multidrop communications links. It offers high data transmission speeds (35 Mbit/s up to 10 m and 100 kbit/s at 1200 m). Since it uses a differential balanced line over twisted pair (like EIA-422), it can span relatively large distances (up to 4000 feet or just over 1200 metres). [[wp> | |
- | It is commonly used in computer serial ports. RS485 enables the configuration of inexpensive local networks and multidrop communications links. It offers high data transmission speeds (35 Mbit/s up to 10 m and 100 kbit/s at 1200 m). Since it uses a differential balanced line over twisted pair (like EIA-422), it can span relatively large distances (up to 4000 feet or just over 1200 metres) | + | |
===== RSA ====== | ===== RSA ====== | ||
- | |||
The RSA is a RS 232 to RS485 converter a MERG system | The RSA is a RS 232 to RS485 converter a MERG system | ||
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===== RSE ====== | ===== RSE ====== | ||
- | + | [[glossary: | |
- | RPC System - RSE (Remote Stack Extension) | + | |
===== RTC ====== | ===== RTC ====== | ||
+ | Computer controller train controller from the [[glossary: | ||
+ | |||
+ | |||
+ | ===== RTFM ===== | ||
+ | |||
+ | Read The Flipping Manual | ||
+ | |||
+ | |||
+ | ===== RTOS ===== | ||
- | Computer controller train controller from the RPC collection a MERG system | + | Real Time Operating System. |
glossary/glossary_r.txt · Last modified: 2023/12/11 11:06 by michael_smith