1100-2294 Rev 1
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High alarm Setpoint
Value above which a high alarm condition occurs. High alarm setpoint must be less than the
sensor full scale range and greater than the low alarm setpoint.
Range of acceptable setpoints is displayed when updating parameter. To update setpoint:
Configure Tab
Alarm
High Alarm Setpoint, enter new setpoint, select OK to confirm.
IMPORTANT:
To prevent intermittent alarm operation at the setpoint due to
measurement noise this instrument implements hysteresis at the setpoint. Once
the alarm level is exceeded, the gas measurement must return a fixed
percentage below the alarm threshold before the alarm is disabled. Typical
hysteresis value is set at 5% of full scale however this is sensor specific and
non-editable.
Alarm Latching
Enabling alarm latching will maintain alarm or fault condition even after the alarm or fault
condition is no longer active. When latched, the alarm or fault condition must be manually
acknowledged before the condition will be cleared. This allows transient alarm or fault
conditions to be identified.
If an alarm is latched, i.e. the condition has occurred but is no longer active, an
acknowledgement button will appear on the home screen. Select this button to acknowledge the
latched condition and clear the alarm or fault.
When disabled the alarm or fault status clears automatically as soon as the condition is no
longer active. To configure:
Configure Tab
Alarm
Alarm Latching, select enable/disable, select
OK to confirm
4.2.3.6 Modbus Configuration
Address
Sets instrument address for connection to RS-485 Modbus interface.
(Default: 1)
.
To set address:
Configure Tab
Modbus
Address, select 1-247, select OK to confirm
IMPORTANT:
Ensure all instruments on RS-485 bus have been configured with
unique node addresses. If two instruments have been configured with same
address, bus contention will occur preventing communications with these
instruments via the RS-485 interface.
Содержание MGS-400
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