Channel Diagnosis - Siemens TX-I/O User Manual

Current output
(4 mA...20 mA)
Siemens
Building Technologies
SIMATIC value
Decimal Hex
20736 5100
1 1
0 0
-1 FFFF
-141
-32767...-142
-32768
SIMATIC value
Decimal Hex
32767 7FFF
32512 7F00
32511 7EFF
27649 6C01
27648 6C00
20736 5100
1 1
0 0
-1 FFFF
-20736 E500
-27648 E4FF
-32512 8100
-32513 80FF

4.11.8 Channel Diagnosis

Alarm type Cause / solution
Invalid Check the module configuration and parameterization
No_Output Operating voltage too low -> check the power
Over_Range Sensor shows a higher value than the rated range > check the output process
value
Under_Range Sensor shows a lower value than the rated range > check the output process
value
Short_Loop The connection between the sensor and module shows a value that indicates a
short-circuit > check the sensor and cable connection between the sensor
and module
Open_Loop The connection between the sensor and module shows a value that indicates an
interruption (open loop) > check the sensor and cable connection between
the module and field device
Unreliable The operating voltage ACDC 24 V is below a specific value (AC or DC) > check the
operating voltage value (power supply)
TX-I/O PROFINET BIM V1.0
Parameters
Analog value Description
7.5 V
361.7 µV
0 V
361.7 µV
Underflow, not supported
Output value limited to 0 V
-54 mV
Underflow, not supported
0.00V Output value limited to 0 V
Channel diagnosis: Under_Range
Analog value Description
0.00 mA Overflow, operating voltage off
22.81 mA
Overshoot range
20 mA
15 mA
Measurement range
4mA  578.7 nA
4 mA
Underflow range
Not supported, output value limited to
0 mA
0 mA
Underflow, no voltage/no current
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CM110564en_02
23.09.2010