Output 4; Output 0 - Festo CPX-4AE-4AA-H Operating Instructions Manual

Commissioning
Digital output value
-6912
< -6912
Tab. 39: Range of values in case of fixed data format (output 4 ... 20 mA)
7.5.7 Output 4 ... 20 mA - scalable data format
– Value range -32768 ... 0 ... 32767
– Scalable data format -32768 ... 0 ... 32767
– Scaling above the lower and upper critical limit
– Use of the critical limits for diagnostics
– Current value output 0 ... 22 mA (for sufficiently scaled data range)
– Current value output in case of overflow (> 22 mA): 22 mA
– Current value output in case of underflow (< 0 mA): 0 mA
– Conversion of the digital output value to the analogue setpoint value (current value output)
Current value = 4 + 16 x (digital output value - lower critical limit) / (upper critical limit - lower critical
limit)
Digital output value
> 32767
-32768 ... 0 ... 32767
< -32768
Tab. 40: Range of values for scalable data format (output 4 ... 20 mA)
7.5.8 Output 0 ... 20 mA - fixed data format
– Value range 0 ... 20 mA
– Data format not scalable
– Current value output in case of overflow (> 22 mA): 22 mA
– Current value output in case of underflow (< 0 mA): 0 mA
– Conversion of the digital output value to the analogue setpoint value (current value output)
Current value = 20 x digital output value / 27648
Digital output value
> 30413
30413
27649 ... 30413
0 ... 27648
0
< 0
Tab. 41: Range of values in case of fixed data format (output 0 ... 20 mA)
Festo — CPX-4AE-4AA-H — 2021-06b
Current value output
0 mA
0 mA
Current value output
22 mA
4 ... 20 mA
0 mA
Current value output
22 mA
22 mA
> 20 mA
0 ... 20 mA
0 mA
0 mA
Meaning
End of output range
Underflow
Meaning
Overflow
Nominal range, freely scalable
Underflow
Meaning
Overflow
End of output range
Overdrive range
Nominal range
End of output range
Underflow
43