Omron NB Screen & NX1P2 PLC Real Number issue

[srsicard3]

I am working on a project using a NB screen and NX1P2 PLC.
I am having a really hard time getting a real number to properly translate through to the PLC.
For example, i have 1.25 entered in a numeric entry box on the screen, the decimal format of the DWORD in the PLC shows up as 1067450368. I have tried different ways of converting including DWORD_TO_REAL, but i am unable to get the 1.25 or even an INT/DINT of 125 to show in the PLC.

Is there a trick for entering REAL numbers on an NB screen and taking that data into the PLC?

NB Screen Setup:
Numeric Data -
Storage Format: Float
Data Length: DWORD
Integer: 2
Decimal: 2

Variable Table -
Memory Type: Word
Area: H
Address: 110
Data Format: BIN

NX1P2 Setup:
Global Variable
Data Type: DWORD
AT: %H110

 

[lostcontrol]

You may need to do a byte/word swap in the plc for this as not sure the NB could deal with it.

 

[drbitboy]

The byte order is fine.

You want to COPy the 32-bits from the DWORD tag into a REAL tag. If the NB cannot do that, then do the following:

• dworig is the intial DWORD tag from the HMI, with a value of e.g. 1067450368
• dwtmp is another DWORD tag.
• reel is the result REAL tag
• if dworig is 0, or -217483568, then reel is 0.0 or -0.0, respectively, and you are done. If not, then continue
• Do a bit-wise AND of dworig with 8388607 (0x007FFFFF) and put the result into dwtmp (2097152).
• Add 8388608 to dwtmp, MOVe (not COPy) the resulting value result into reel (10485760.0).
• If dworig is negative, then make multiply reel by -1.0 and put the result back into reel (10485760.0; dworig is not negqative)
• Divide reel by 8388608.0, put the resulting value into reel(1.25).
  • N.B. you are not done; it only appears that you are done because the value is in the range [1.0,2.0).
• Do a bit-wise AND of dworig with 2139095040 (0x7f800000), put the result in dwtmp (1065353216)
• Divide dwtmp by 8388608, put the result in dwtmp (127)
• if dwtmp is 127, then you are done.
• If dwtmp is less than 127, then subtract dwtmp from 127 and put the result in dwtmp, and the OP below will be divide
• if dwtmp greater than 127, then subtract 127 from dwtmp and put the result in dwtmp, and the OP below will be multiply.
• if
  • bit 0 of dwtmp is 1, then OP (divide or multiply) the value of reel by 2.0 and put the result in reel.
  • bit 1 of dwtmp is 1, then OP the value of reel by 4.0 and put the result in reel.
  • bit 2 ... by 16.0 ...
  • bit 3 ... by 256.0 ...
  • bit 4 ... by 65536.0 ...
  • bit 5 ... by 4294967296.0 ...
  • bit 6 ... by 1.8446744E+19 ...

 

[drbitboy]

Never mind all that: use the CopyNumTo instruction instead.