IR20PTCRead
D = Device(ANINP)
R = Reading functions
The IR20PTCRead function reads the temperature value for a three point PT100 differential reading mode.
IMPLEMENTATION
IR20PTCRead (PTA_V1, PTA_V2, PTA_V3, glResistance, gbError)
Parameters:
| IN/OUT | VARIABLE TYPE | EXAMPLE NAME | DIM | |
|---|---|---|---|---|
| IN | INTDEVICE ANINP | PTA_V1 | - | Mnemonic nameof ANINP device used for the entry V1 |
| IN | INTDEVICE ANINP | PTA_V2 | - | Mnemonic nameof ANINP device used for the entry V2 |
| IN | INTDEVICE ANINP | PTA_V3 | - | Mnemonic nameof ANINP device used for the entry V3 |
| OUT | GLOBAL | glResistance | L | It is the resistance read value expressed in hundredths of Ohm. |
| OUT | GLOBAL | gbError | B | Variable containing the error code: 0 = no error 3 = disconnected input |
Error
Once invoked the function if there are any errors the error variable having the following values:
0 - No errors
3 - Disconnected input
Example
... ; PT100 resistance reading IR20PTCRead (PTA_V1, PTA_V2, PTA_V3, resistance, gbError) ...
Note
-
The function initializes some parameters related to 3 ANINP devices passed to the function, as follows:
PTA_V1:offset = 0 PTA_V1:scaleA = 1 PTA_V1:scaleB = 1 PTA_V1:scaleC = 0 PTA_V2:offset = 0 PTA_V2:scaleA = 1 PTA_V2:scaleB = 1 PTA_V2:scaleC = 0 PTA_V3:offset = 0 PTA_V3:scaleA = 1 PTA_V3:scaleB = 1 PTA_V3:scaleC = 0