IDEC WindSRV - Manual (Page 114)

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most significant bits are ignored.
Read Algorithm Reads from a 16-bit register using the following algorithm:
Result =((Raw_value/4095) * 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) * 4095) + .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.
13AL Signal Conditioning
Description 13-bit binary number.
Input Range 0 - 8191.
Scaling Scales 13-bit binary values to the database block's EGU range.
Read Algorithm Reads from a 16-bit register using the same algorithm as 13BN, and
returns a status indicating whether the value is out of range and in an
alarm state, or OK.
Result=((Raw_value/8191) * 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 same algorithm as 13BN, 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) * 8191) + .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.
13BN Signal Conditioning
Description 13-bit binary number.
Input Range 0 - 8191.
Scaling
Scales 13-bit binary values to the database block's EGU range. Ignores
the most significant 3 bits.
Read Algorithm Reads from a 16-bit register using the following algorithm:
Result =((Raw_value/8191) * 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) * 8191) + .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.