Table of Contents
Advertisement
Fault
No.
Cause as a function of fault value
(r047.001, r949.001 or r949.009 with acknowledged error)
F042
Tachometer fault
(active in operating states of – –, I, II)
A check is performed every 20ms to ensure that
If the check result is incorrect for 4 times in succession, the fault message is activated.
The following rule applies:
100% actual speed
100% actual EMF
The ideal DC voltage average value at
The monitoring function is effective only if the EMF > a % of
"a" is a percentage that can be set in parameter P357 (default setting 10%).
The monitoring function is effective only if the armature current is > 2% of the converter rated DC current set in r072.002.
Possible fault causes
♦ Open circuit in tachometer or pulse encoder cable.
♦ Tachometer of pulse encoder cable incorrectly connected.
♦ Pulse encoder supply has failed.
♦ Polarity for actual speed value (P743) is incorrectly set.
♦ Armature circuit data (P110 und P111) are incorrectly set (execute current controller optimization run).
♦ Tachometer or pulse encoder defective
♦ Pulse encoder supply voltage is incorrectly set (P140)
♦ The field polarity is not reversed by the external hardware when the field is reversed.
Fault value:
1
Open circuit in tachometer or pulse encoder cable
2
Polarity of tachometer or pulse encoder is incorrect
9-12
Description
Actual
speed
Actual
EMF
= maximum speed
= ideal average DC voltage at
3
α
∗
P078.001
= 0 is
P078.001
Further information (r047.002 to r047.016)
(K0179)
is > +5%
(K0287)
α
≥ 0, i.e. when the thyristor bridge is fully gated
∗
2
π
∗
3
2
∗
π
r047 Index 002 to 016:
i002 Actual speed value (K0179) in case of fault
i003 Actual EMF value (K0287) in case of fault
SIMOREG DC Master Base Drive Panel Operating Instructions
Siemens Energy & Automation
Advertisement
Table of Contents
