Section 2 - Overview
System Overview
Refer to the figure below:
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| ALARM | DISPLAY & | |
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| EVENT | KEYBOARD | |
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| MANAGER | MANAGER | |
RELAY | MASTER | ALARM MASTER SETUP | DISPLAY BUILDER | |
OUTPUTS | ||||
ENABLE | DIGITAL OUTPUT SETUP | ROTATE LIST | ||
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| ALARM EVENT LOG | WIDGET CONTROL |
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| SYSTEM |
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| DIGITAL | MANAGER |
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DIGITAL |
| INPUT | ETHERNET | USB A/B |
| MANAGER | SYSTEM SECURITY |
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INPUTS |
| SYSTEM SETUP | RS232/485 | |
MASTER |
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| LANGUAGE | |||
| ENABLE |
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| DIGITAL INPUT SETUP | … .. CONFIGURATION |
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| DATA | DATA | AUDIO IO |
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| STORAGE | ||
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| MANAGER |
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| MANAGER |
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| CHANNEL SETUP | MOUSE & | |
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| CALIBRATION | RECORD SETUP | KEYBOARD |
ANALOG |
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| FILE EXPLORER |
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INPUTS |
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Figure 2-1 System Overview
The recorder block diagram shows the major elements of the unit.
The Analog Inputs module scans the live inputs (6 or 12 channel) at a rate of 10 times per second per channel, converting the analog inputs to digital values and applying a time stamp to the digitized data. The Data Manager collects this data at a rate of 120 samples per second from the Analog Inputs module and processes it in real time applying any scaling or linearization as required by user programming, and holds it in a buffer for use by the rest of the system. This process has the highest priority and runs irrespective of whatever other activity is going on in the recorder. Data is fed on demand to the following:
Data Storage Manager receives data at a rate set by the user for recording to the media. The media is selected by the user – compact flash, USB device or internal memory (SD card). The data is buffered till there is a suitable amount and is then flushed to the selected media.
Display & Keyboard Manager receives data at a rate to satisfy the displays setup by the user, trends, digital or bar graphs.
Alarm Event Manager receives all data required to do comparison to any user set up alarm. If any alarm is exceeded the Alarm Event Manager will perform the required user set action, including sounding the alarm, closing any contacts, updating the display, initiating an email and making an entry in the log.
System Manager receives all data required to keep the various communications servers up to date. This includes the web, Modbus and OPC servers, and ftp data files.
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