Rtd Input; Real-Time Clock; Diagnostic Monitoring; Automatic Self Tests - Emerson FloBoss 103 Instruction Manual

1.4.5
1.4.6
1.4.7
1.4.8
Revised August-2017
The Comm 2 port is capable of initiating a message in support of
Spontaneous-Report-by-Exception (SRBX) alarming. Refer to Chapter
3 for additional information. One of the following card types can be
accommodated:
▪ EIA-232 (RS-232) for asynchronous serial communications (baud
rate up to 19,200).
▪ Dial-up modem for communications over a telephone network
(default at 2400 baud).

RTD Input

The FB100 supports a direct input from a Resistance Temperature
Detector (RTD) sensor to measure flowing temperature. The RTD has a
measurement range of -40 to 240°C (-40 to 464°F). The terminals for
the RTD wires are labeled "RTD" (see Figure 1-4).
During operation, the RTD is read once per second. The value from the
RTD is linearized, and then it is sent to processing as Analog Input (AI)
Point Number A3. The AI routine converts this value to engineering
units, and checks alarming. To conserve power, the RTD power is
switched on and off. During calibration, the RTD power is on
constantly. When calibration completes, the RTD cycles power again.

Real-Time Clock

The real-time clock provides the FB100 with the time of day, month,
year, and day of the week. The real-time clock automatically switches to
backup power when the FB100 loses primary input power. Backup
power for the real-time clock is adequate for a period in excess of five
years with no power applied to the FB100.

Diagnostic Monitoring

The electronics board has three diagnostic inputs incorporated into the
circuitry for monitoring battery voltage, logical voltage, and board
temperature. Access these analog inputs using the I/O function of
ROCLINK 800 software. The three values are available as the following
Analog Input (AI) points:
▪ E1 – logical voltage
▪ E2 – battery voltage
▪ E5 – board (battery) temperature

Automatic Self Tests

The FB100 performs the following self-tests on a periodic basis:
▪ Software and hardware watchdog
▪ Sensor operation
▪ Memory validity
General Information
FloBoss 103/104 Instruction Manual
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