Closed-loop thyristor current control
System- and communication configuring D7-SYS - SIMADYN D 5-27
Edition 06.2002
YHW Fault message → remedy
Bit 1 Logical 0
Bit 2 ∅
Fuse monitoring (Sitor)
→ check whether a fuse has failed
Bit 3 ∅
Temperature monitoring (Sitor)
→ check for overtemperature
Bit 4 ∅
Undervoltage (Sitor)
→ check the line supply values and connector SOL.UNM
Bit 5 ∅
External pulse inhibit if a voltage is not available at the input
→ ITDC-X5:10 > 15 V
=
ˆ
pulse enable
Bit 6 ∅
Logical 0
=
ˆ
Bit 7 ∅
Hardware Watchdog ITDC
Causes: Defective module,
→ replace the module
Task overflow in the PMx
→ modify the configured software
Bit 8 Total pulse inhibit (display: ITDC-X5:15)
Cause: Voltage missing, SW pulse inhibit, HW-ITDC fault
→ remove the fault statuses
Bit 9-16 Logical 0
∅ = suppressed with MNE=1
Table 5-4 HW faults from the ITDC
If the group inhibit fault word is set (SOL.MNE=1), this permanently
deletes the defined bits in fault words SOL.YF1\2.
An alarm message is transformed from YW1 or YW2 into fault message
YF1 or YF2 by setting bits 1-16 at SOL.HM1 or SOL.HM2.
The closed-loop thyristor current control is switched-out by a fault
message in fault word YF1 or YF2.
Significance of
fault bits ITDC
HMH → YHW
Group inhibit, fault
word YF1/YF2
Fault words
YW1 ,YW2
YF1 , YF2
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