Interrupt, error, and system messages
7.5 Diagnostics with STEP 7
ET 200eco PN
94 Operating Instructions, 08/2016, A5E01250250-AJ
Error classes for I/O devices
Error classes and remedies
The following tables show the error types for the I/O devices.
Error type for I/O devices, digital inputs/outputs, analog inputs/outputs
Table 7- 8 Overview Error types
00001
B
1
D
Short-circuit
• Short-circuit to M at the sensor supply
line
• Short-circuit at the output line
• Load impedance too low
• Correct the process wiring
• Check the sensor or actuator
00100
B
4
D
Thermal over-
load
• I/O device is overheating • Check the process wiring
• Check the ambient temperature
00110
B
6
D
Wire break
• Signal line to a sensor or actuator
interrupted
• Sensor or actuator failure
• Load impedance too high
• Correct the process wiring
• Replace the sensor or actuator
• Use a sensor with lower impedance
• Use an actuator with lower load im-
pedance
00111
B
7
D
Violation of
upper limit
• The value is above the overrange • Correct the I/O device to sensor tun-
ing
• Modify measuring range by means of
parameter assignment
01000
B
8
D
Violation of
lower limit
• Value is below the underrange • Correct the I/O device to sensor tun-
ing
• Modify measuring range by means of
parameter assignment
01001
B
9
D
Error
• Internal I/O device error has occurred
(diagnostic message on channel 0
applies to the whole I/O device).
• Replacement of I/O device
10000
B
16
D
Parameter as-
signment errors
• I/O device is incorrectly parameter-
ized
• Correct the parameter assignment
10001
B
17
D
1L+ or 2L+ is
missing
• Supply voltages missing or too low
• Load voltage supply missing or too
low
• Check the supply voltages
• Check the load voltage supply
• Correct the process wiring
10101
B
21
D
Reference
channel fault
• Measurement cable for compensation
interrupted
• Data record DS2 incorrect
• Timeout for "Dynamic ref. Temp."
• Correct the process wiring
• Check the data record DS2.
• Send DS2
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