Spectrum Controls 1756sc-OF8H Series A - Manual (Page 129)

Chapter 8: Ladder Program Examples 115
Figure 8.4e (OF8H HART Message Ladder)
Swap Byte Swap Byte Swap Byte Swap Byte Swap Byte
L a d d e r L a d d e r L a d d e r L a d d e r L a d d e r Figure 8.5 demonstrates how to reverse the order of the bytes for a
floating point tag and then convert it to 4 consecutive SINT tags, so that it
can be used in a HART message.
!
Attention: If the HART message being sent or Attention: If the HART message being sent or Attention: If the HART message being sent or Attention: If the HART message being sent or Attention: If the HART message being sent or
received using the pass-through command contains received using the pass-through command contains received using the pass-through command contains received using the pass-through command contains received using the pass-through command contains
floating point values, the order of the bytes must be
floating point values, the order of the bytes must be floating point values, the order of the bytes must be floating point values, the order of the bytes must be floating point values, the order of the bytes must be
r e v e r s e d .
r e v e r s e d . r e v e r s e d . r e v e r s e d . r e v e r s e d .
Figure 8.5 (Converting a FLOAT Value To Its 4 byte HART Equivalent)