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## Analog Output Conversions

 Analog J and S l data field

l - {[(DesiredD - Z) / (F - Z)] * 4095} Convert to 3 hex digits

 Where: l is the 3 hex digit value to be entered into the instruction DesiredD is the actual value desired in decimal based on the module units. For example, if you want a module to read 2.5 Volts, then DesiredD = 2.5. F is the full scale value of the module and Z is the zero scale of the module. These are shown for the standard modules in the table below.

duTec Module F Z Units
OV5

5

0

Volts

OV10

10

0

Volts

OI420

20

4

mAmps

 Example: 3.6 Volts output by an OV10 Module l = [(3.6 - 0) / (10 - 0)] * 4095 = 0.36 * 4095 = 1474.2 = 5C2H is the value entered in the l data field

 Analog K l data field

ResponseD = [(l / 4095) * (F - Z) + Z]

 Where: Response is actual value read by the input in engineering units. l is the 3 digit hex value converted to decimal. F is the full scale value of the module, and Z is the zero scale of the module. These are shown for the standard modules in the table below.

duTec Module F Z Units
OV5

5

0

Volts

OV10

10

0

Volts

OI420

20

4

mAmps

 Example: 78FH is returned from an OI420 Module 78FH = 1935D ResponseD = (1935 / 4095) * (20 - 4) + 4 = 0.473 * 16 + 4 = 7.56 + 4 = 11.56 mA

 Analog V p and q data field

p or q = [(DesiredD - Z) / (F - Z)] * 4095 Convert to 3 hex digits

 Where: p or q is the 3 hex digit value entered into the instruction. DesiredD is the amplitude desired in engineering units. F is the full scale value of the module and Z is the zero scale of the module. These are shown for the standard modules in the table below.

duTec Module F Z Units
OV5

5

0

Volts

OV10

10

0

Volts

OI420

20

4

mAmps

 Example: 18mA is the desired maximum amplitude and 7 is the desired minimum amplitude for an OI420 (4-20mA) Module p = [(18 - 4) / (20 - 4)] * 4095 = {14 / 16} * 4095 = 0.875 * 4095 = 3583.125 = DFFH q = [(7 - 4) / (20 - 4)] * 4095 = [3 / 16] * 4095 = 0.1875 * 4095 = 767.81 = 2FFH

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