Emerson MC68HC16Z1 Typical Sequence, LCD flashes, LCD stops flashing, Entry in Alarm History Log

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Introduction

1.3Typical Sequence

Figure 3 shows a typical sequence of how the Liqui-tect Monitoring System functions after detecting a leak, contamination or cable break in either Zone 1 or Zone 2. Responses depend on configuration settings. This example shows what happens when a leak is detected.

Figure 3 Example of typical sequence: Analog input reaches high setpoint

RESPONSES TO AN ALARM

RETURN-TO-NORMAL SEQUENCE

ALARM CONDITION DETECTED A leak is sensed along the cable defining Zone 1.

The horn sounds (audible horn on the controller board—silence horn by pressing any key on the LCD keypad)

The LCD flashes

ESC

ESC

RETURN TO NORMAL

The leak is controlled.

The alarm is cleared (automatically if Unlatched; must be cleared manually if Latched)

The horn stops sounding

(if user hasn’t silenced it)

The LCD stops flashing

ZONE 1

Entry in Alarm History Log

ZONE 1

Entry in Alarm History Log

LEAK @ 3495ft 29-AUG-03 09:29:10

ALARM RESET - LCD

29-AUG-03 09:42:11

ZONE 1

NO LEAK 29-AUG-03 09:42:11

(if alarms defined as Latched)

Entry in Zone Trend Log

(if alarms defined as Unlatched)

3

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Contents LIQUI-TECT Monitoring System Page Table of Contents Figures Introduction Equipment InspectionKey lock Outside Enclosure OverviewLCD stops flashing Entry in Alarm History LogTypical Sequence LCD flashesController board components Controller Board Overview24VAC connector RS232 connectorRS485 connector Power receptacleLED indicators summary LED IndicatorsPacking Contents Installation ConsiderationsUnpacking and Preliminary Inspection Required tools Surface-Mounting the Liqui-tect PanelMounting the Panel Flush-Mounting the Liqui-tect Panel 24VAC input connector Connect Power to the Liqui-tect PanelInput Power Connections Small Enclosure Terminal 24VAC wiring red & whiteTroubleshooting Transformer Module Input and Output Power Connections Large EnclosureInput Power Connections VAC Output Power ConnectionsWiring specifications Attaching Leak Detection Connection Cable to the Panel Connecting Leak Detection Cable InputsLeak detection cable LT500Y Connecting Leak Detection Cable to the Connection CableSections Hold-down clips At beginning End of arc PatternsAlarm outputs Connecting Alarm OutputsDIP switch Audible horn RS422 SiteScan Web ConnectorDisable the Audible Horn RS422 SiteScan Web connectorView Status Menu View Status OverviewSystem and Control Overview Main MenuView Zone Trend View Alarm HistoryView Status View Cable StatusOverall Condition View Cable StatusCable Status Screens Viewing Additional ScreensAlarm History Log conditions View Alarm HistoryAlarm History Log Alarm History LogZone Trend Log View Zone TrendZone Trend Log Alphanumeric Special characters LoginLogin Valid characters for data entryReset Latched Alarms Login ScreenSetup System Reset Latched AlarmSetup System Setup ZN1 Zone Setup System OverviewChange Zone Label Identify the Zone as ConnectedChange Units Label Auto Calibration Progress Set Up Sensitivity for Water DetectionAuto Calibration Change Maximum LengthContamination Detection Sensitivity Set Up Sensitivity for Contamination DetectionSetup Zone 2 Menu Setup System Setup ZN2 ZoneSetup System Setup Alarm Outputs Define Relays as Normally Open or Normally Closed Define Alarms as Latched or UnlatchedSignal Operation Specify Longest Cable LengthSelect Setup Re-Alarm Delay Setup System Setup Re-Alarm DelayLatched Alarms Only Unlatched Alarms OnlyDefault mapping values Setup System Setup MapmodeSelect Setup Mapmode Select Zone to Map Set Up Mapping for Zone 1 or ZoneMessage if No Mapping View Last MapSelect Zone to Map Mapping for Last MapChange Password Setup System Setup System InfoReset Password to the Factory Default Aaaa Change Date & Time/Automatic Daylight Saving Time Factory DefaultsFactory default settings Factory DefaultsReset Latched Alarms Reset Latched AlarmsLog In and Choose Reset Latched Alarm Choose Y to Reset AlarmsClear Alarm History Log In and Choose Clear Zone Trend Clear Zone TrendClear Zone Trend Liqui-tect Panel Specifications Specifications Specifications Page Asia 23F, Allied Kajima Bldg Technical Support/ServiceCompany Behind the Products Locations

MC68HC16Z1 specifications

The Emerson MC68HC16Z1 is a versatile microcontroller that combines power and efficiency, making it an ideal choice for various embedded applications. As part of the Motorola 68HC16 series, the MC68HC16Z1 is designed to deliver robust performance while offering extensive support for both simple and complex tasks. With its 16-bit architecture, this microcontroller is well-equipped to handle a range of functionalities, from industrial control systems to automation processes.

One of the main features of the MC68HC16Z1 is its high-performance 16-bit CPU, which operates at speeds up to 20 MHz. This allows for efficient data processing and execution of instructions, which is critical in time-sensitive applications. The microcontroller boasts a rich instruction set, including various addressing modes that enhance programming flexibility. This versatility enables developers to implement efficient algorithms tailored to their specific application needs.

Power management is another noteworthy characteristic of the MC68HC16Z1. The device supports low-power operation modes, which is essential for battery-powered applications or scenarios where energy consumption is a concern. With its capability to switch between different operational states, the microcontroller can significantly extend battery life while ensuring that performance is not compromised.

The MC68HC16Z1 also includes an integrated analog-to-digital converter (ADC) that allows for direct interaction with analog signals. This feature is particularly beneficial in applications that require sensor data acquisition. Additionally, the microcontroller provides various communication interfaces, including serial communication options like UART and SPI, facilitating seamless data transfer between devices.

In terms of memory, the MC68HC16Z1 supports a wide range of options, including both RAM and ROM, allowing for flexible storage solutions depending on the application requirements. The built-in programmability further allows for updates and modifications to the firmware, ensuring that the system can adapt to evolving project specifications.

Moreover, the microcontroller features an extensive array of I/O ports, making it capable of interfacing with various peripheral devices such as sensors, actuators, and displays. This extensive connectivity enhances its usability in a range of applications, from robotics to automotive systems.

In summary, the Emerson MC68HC16Z1 microcontroller stands out for its balanced blend of performance, low power consumption, and feature-rich design. Its 16-bit architecture, integrated ADC, versatile communication interfaces, and extensive memory options make it a go-to choice for developers looking to create effective and reliable embedded systems. Whether for industrial automation or consumer electronics, the MC68HC16Z1 continues to be a dependable and powerful component in the realm of microcontroller technology.