Current ("AI_1xC) - Measuring ranges and scaling type (0x382199)

1. Set the measuring range via index 0x80AD:11 "Input type"
(see table "Measuring ranges and scaling type").

2. Select the scaling type via index 0x80AD:12 "Scaler":

Scaling type

Index 0x80AD:12 "Scaler":
0x0000 (0_dec) (pre-set)	Extended Range	This type of scaling allows the nominal measuring range to be exceeded or undershot by approx. 7%. Technical measuring range The technically usable range is -107% to +107% of the respective full scale value. Nominal measuring range For the "Extended Range", the PDO value ±30518 (0x7736) is defined as ±100% for 16 bits.
0x0003 (3_dec)	Legacy Range	Nominal measuring range = Technical measuring range This scaling type indicates the range from -100% to +100%, where +100% = +32767 -100% = -32768.

Index 0x80AD:12 "Scaler":

Value

Name

Meaning

0x0000 (0_dec) (pre-set)

Extended Range

This type of scaling allows the nominal measuring range to be exceeded or undershot by approx. 7%.

Technical measuring range
The technically usable range is -107% to +107% of the respective full scale value.

Nominal measuring range
For the "Extended Range", the PDO value ±30518 (0x7736) is defined as ±100% for 16 bits.

0x0003 (3_dec)

Legacy Range

Nominal measuring range = Technical measuring range
This scaling type indicates the range from -100% to +100%, where
+100% = +32767
-100% = -32768.

As a result, the bit meaning with the (user-selected measuring range) full scale value (FSV) is as follows:

Measuring ranges and scaling type

0x80AD:11 "Input type"	Current - measuring ranges (module "AI_1xC" (ModuleIdent 0x382199))
0x80AD:11 "Input type"	Technical (Extended Range) 0x80AD:12 "Scaler" = 0x0000 (0_dec)	Nominal (Legacy Range) 0x80AD:12 "Scaler" = 0x0003 (3_dec)	Full scale value (FSV)
0x0011 (17_dec)	-21.474 … +21.474 mA	-20 … +20 mA	20 mA
0x0012 (18_dec)	0 … +21.474 mA	0 … +20 mA	20 mA
0x0013 (19_dec)	0 … +21.474 mA	4 … +20 mA	20 mA

The measuring ranges and measuring range monitoring are shown graphically in the following figure.

Current ("AI_1xC) - Measuring ranges and scaling type (0x382199) 2:

Underrange / Overrange: the corresponding bits are set if the measured value is outside the nominal measuring range.

Range error: The error thresholds for the error bit and the error LED can be set in Extended Range mode via index 0x80AD:17 "Low Range Error" and index 0x80AD:18 "High Range Error". The limit values of the technical measuring range are pre-set.

Notice Read the descriptions and notes on the status bits and on setting the error thresholds in the chapter "Measuring range monitoring".