User manual

Digital Monitor AMC-1DBx Series User Manual
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6 OPERATION AND CALIBRATION
This section provides information about the operation and calibration procedures for the
Gas Monitor AMC-1DBx.
6.1 OPERATION
The Gas Monitor AMC-1DBx provides the power and monitoring functionality for
attached sensors. It communicates with the sensors via digital highways employing
RS-485\MODBUS, and can access a maximum of 988 sensors/transmitters (4 interfaces
x 247 MODBUS addresses per interface).
User displays provide detailed information on the operation of the monitor and attached
devices (for example, sensors, relays and analog outputs) through the use of menu and
submenu items. The user interface also consist of LEDS as indicated in 4.1.1 Monitor
Features. Additionally there is an External Buzzer and Annunciator which offers
feedback on the state of the system. Formally the system state/status is reported to
supervisory systems through the use of multiple interfaces. These include local devices
such as Analog Outputs and digital interfaces employing protocols such as BACnet-IP
and MODBUS-RTU.
The monitor must be configured to define the sequence of operation. There are several
methods to configure the monitor:
• Using AMC Manager PC Application,
• Using BAS MODBUS-RTU Interface,
• Using Monitor’s Menu System.
The menu system is password protected for making changes. When the operator is not
logged in, they are limited to inspecting the configuration. When the user is logged in,
then they can make changes to the configuration. Once logged in any menu navigation,
AMC Manager downloads or BAS MODBUS writes will automatically save the current
context to the data base storage device (not including USB) device after idle activity of
60 seconds. Idle activity of 30 seconds or more will also transfer current data base state
to the system which will include the RS-485, Ethernet and BACnet-IP subsystems. Care
must be taken not to power off the system until changes are secure in the data base
storage device.
Note: Updating the RS-485, Ethernet and BACnet-IP subsystem will cause outages on
remote devices. Due to conflicting nature of implementing incomplete data base
changes the operator should use the System Configuration DIP Switches to alleviate
people’s concerns and protect the buildings fan controllers. Please refer to 4.1.2.1 with
respect to Audio Disable and CAL Mode for details.
Additionally the Monitor’s USB port can be used to save, restore database and upgrade
the firmware.
The USB Port with a USB storage device can create and append log files for the
following states: