IDEC WindSRV - Manual (Page 116)

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Write Algorithm Writes to a 16-bit register with alarming using the same algorithm as
15BN, and returns a status indicating whether the value is out of range
and in an alarm state, or OK.
Result=(((InputData - Lo_egu)/Span_egu) * 32767) + .5.
Write Algorithm Variables Lo_egu - the low engineering value.
Span_egu - the span of the engineering values.
InputData - the database block's current value.
Result - the value sent to the process hardware.
15BN Signal Conditioning
Description 15-bit binary number.
Input Range 0 - 32767.
Scaling
Scales 15-bit binary values to the database block's EGU range. Ignores
the most significant bit.
Read Algorithm Reads from a 16-bit register using the following algorithm:
Result =((Raw_value/32767) * Span_egu) + Lo_egu.
Read Algorithm Variables Lo_egu - the database block's low engineering value.
Span_egu - the span of the engineering values.
Raw_value - the value stored in the field device's register.
Result - the scaled value stored in the database block.
Write Algorithm Writes to a 16-bit register using the following algorithm:
Result =(((InputData - Lo_egu)/Span_egu) * 32767) + .5.
Write Algorithm Variables Lo_egu - the low engineering value.
Span_egu - the span of the engineering values.
InputData - the database block's current value.
Result - the value sent to the process hardware.
20P Signal Conditioning
Description 6400 – 32000 Clamp.
Input Range 6400 – 32000.
Scaling Scales binary values to the database block's EGU range. Clamps value
to 6400 – 32000 range.
Read Algorithm Reads from a 16-bit register using the following algorithm:
Result =(((Raw_value - 6400)/25600) * Span_egu) + Lo_egu.
Read Algorithm Variables Lo_egu - the database block's low engineering value.
Span_egu - the span of the engineering values.
Raw_value - the value stored in the field device's register.
Result - the scaled value stored in the database block.
Write Algorithm Writes to a 16-bit register using the following algorithm:
Result =(((InputData - Lo_egu)/Span_egu) * 25600) + 6400.5.
Write Algorithm Variables Lo_egu - the low engineering value.
Span_egu - the span of the engineering values.
InputData - the database block's current value.
Result - the value sent to the process hardware.
TNON Signal Conditioning
Description 0 – 32000 Clamp.
Input Range 0 – 32000.
Scaling Scales binary values to the database block's EGU range. Clamps value
to 0 – 32000 range.
Read Algorithm Reads from a 16-bit register using the following algorithm: