RC Systems ViewSmart 1600+, Operation Manual

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UM-1097
Revision B 72
4.9 Fault Condition
The Fault alarm is used to indicate a condition when there is a failure from the sensor or an out of range
state has been reached. It is recommended to set the fault alarm level to -10% of the span value. For
example, if an H2S sensor is installed with a span value of 100, the fault should be set at -10, or if an
oxygen sensor is installed with a span value of 25, the fault setting should be -2.5.
The Fault relay is always Failsafe. This is necessary for the relay to de-energize in the event there is a loss
of power, so that a Fault will be indicated by the display color changing to red and the red Fault LED
flashing.
4.10 Alarm Conditions
The ViewSmart 1600+ allows the user to select the color associated with a certain alarm level. Options
include yellow, orange, red, blue and purple. Alarm 1 is always set to yellow, and the Fault alarm is always
set to Red.
When an alarm level is reached, the display will change the channel’s color to the user defined color and
the alarm level will flash on the display. If Latching is turned on, the alarm will stay enabled until the user
acknowledges the alarm, even if the alarm condition has cleared.
4.11 Communication Errors
The Master Timeout menu item, found in the Comm Port Settings Menus affects the ViewSmart 1600+’s
master
Modbus® ports. Timeout is the length of time in milliseconds the controller waits before a
Modbus® request fails. Three consecutive failed requests must occur before a communication error is
indicated. This item is useful for optimizing throughput to the ViewSmart 1600+ from other slave RTUs.