Cameron Scanner 3100, Руководство пользователя

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Input Status Definitions
Bit Position Status When Bit=1
0 Input Disabled
1 High
2 High High
3 Low
4 Low Low
5 Fail
6 Overridden
7 Maintenance
8 Data Input Change
9 Input Invalid
10 Input is Integer
11 Input is Data Type Mismatch
12 Invalid K-Factor
13 Low Input Cutoff
14 High Range Overridden
15 Override Input Invalid
16 Override Input is Integer
17 Override Input is Data Type Mismatch
18 Override Input Category Mismatch
19 Low Cutoff Above High Range
Generally, the Scanner 3100 low, high, low-low, and high-high conditions for inputs are defined as shown in the follow-
ing table.
Status Description
Low Below transducer range by 0.5% of span
Low Low Below transducer range by 20% of span
High Above transducer range by any amount
High High Above transducer range by 20% of span
Alarm records are created when the device goes into and out of alarm condition. For example, an alarm is created when
a damped input is greater than the upper end of the transducer range. The alarm will not clear until the damped value is
less than 0.5% of span below the upper limit of the transducer range. A damped value is altered by field calibration but
has not been altered by the low input cutoff value.
Fail status results when any of the following fail conditions exist.
Input Fail Condition
RTD Open circuit or short circuit is detected
1 to 5 VDC Input less than 125 mV
4 to 20 mA Input less than 0.5 mA
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Scanner 3100 Modbus Protocol Section 2