Table 188: Definition of errors
ERRSTAT output integer
Priority 3 Priority 2 Priority 3 Priority 1
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Interfer-
ence
detected
Under-
current
Under-
voltage
Over-
current
Over-
voltage
Frequ-ency
difference
No current No voltage
The ERRSTAT description will be shown in clear text in ICT.
The priority of the signals is set that the group priority 1 overrides the group priority 2 and 3, and
priority 2 overrides priority 3. Note that the ERRSTAT signal can enable several error cases at the
same time.
Following errors is detected and derived in the Error block:
• B0 = Injected voltage signal not found
• B1 = Injected current signal not found
• B2 = Voltage and current signal frequency differs
• B3 = Measured total RMS voltage too high
• B4 = Measured total RMS current too high
• B5 = Injected voltage signal too low
• B6 = Injected current signal too low
• B7 = External interference voltage detected
ERRSTAT = BitToInt[B7,…,B1,B0] The priority of the error conditions that will be flagged out:
• Prio1 = B0, B1
• Prio2 = B3, B4, B5, B6
• Prio3 = B2, B7
RFAULT output signal
The injection equipment provides calculation of the fault resistance:
• If the fault resistance is equal or below 10 kΩ, RFAULT displays the evaluated resistance to
ground in ohm
• If the fault resistance is above 10 kΩ, RFAULT initially displays the code -1000 until the
evaluated resistance to ground reaches a stable value, which is displayed in ohm
• If an error condition is active, RFAULT displays the code -2000
1MRK 502 066-UUS B Section 7
Impedance protection
411
Technical manual
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