Emerson E300 Series - Page 377

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Diagnostics Optimization CT MODBUS RTU Technical Data
E300 Design Guide 377
Issue Number: 1
The threshold detector functions are always active even if the source and destination are not routed to valid parameters. If the source is not a valid
parameter then the source value is taken as 0. The update rate for each of the threshold detector functions is always 4 ms.
The following description is for threshold detector 1, but threshold detector 2 operates in the same way. The level of the parameter defined by
Threshold Detector 1 Source (K24) is converted to a percentage and compared to Threshold Detector 1 Level (K25) with hysteresis to give Threshold
Detector 1 Output (K23) as follows:
Lower threshold = Threshold Detector 1 Level (K25) - Threshold Detector 1 Hysteresis (K26)
Upper threshold = Threshold Detector 1 Level (K25) + Threshold Detector 1 Hysteresis (K26)
The output value can then be inverted with Threshold Detector 1 Output Invert (K27) before being routed to the destination defined by Threshold
Detector 1 Destination (K28).
See Threshold Detector 1 Output (K23).
See Threshold Detector 1 Output (K23).
See Threshold Detector 1 Output (K23).
K23 Threshold Detector 1 Output
Mode Open-Loop, RFC-A, RFC-S
Minimum 0 Maximum 1
Default Units
Type 1 Bit Volatile Update Rate 4 ms read
Display Format Standard Decimal Places 0
Coding RO, ND, NC, PT
Source Threshold Detector 1 Output (K23)
Source 0
Lower threshold ≤ Source No change of state
Source ≥ Upper threshold 1
K24 Threshold Detector 1 Source
Mode Open-Loop, RFC-A, RFC-S
Minimum A00 Maximum AB99
Default A00 Units
Type 16 Bit User Save Update Rate Drive reset read
Display Format Menu Param Alpha Numeric Decimal Places 3
Coding RW, PT, BU
K25 Threshold Detector 1 Level
Mode Open-Loop, RFC-A, RFC-S
Minimum 0.00 Maximum 100.00
Default 0.00 Units %
Type 16 Bit User Save Update Rate 4 ms read
Display Format Standard Decimal Places 2
Coding RW
K26 Threshold Detector 1 Hysteresis
Mode Open-Loop, RFC-A, RFC-S
Minimum 0.00 Maximum 25.00
Default 0.00 Units %
Type 16 Bit User Save Update Rate 4 ms read
Display Format Standard Decimal Places 2
Coding RW