Hitachi SJ Series, User Manual

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12-22-1
Chapter 12 Inverter Function
12.22 How to detect break and
out-of-range errors at analog inputs
12.22.1 Detecting break and out-of-range
errors at main body terminals
• I want to detect break errors at analog inputs.
• I want to maintain a constant speed even when a
break or short-circuit error occurs.
• Assign the output terminal functions 050 [Ai1Dc],
051 [Ai2Dc], and 052 [Ai3Dc] analog break signals
to one of [CC-01] to [CC-17] that corresponds to
the output terminal and output the signals.
• The signals will be output when the input values of
the analog inputs [Ai1], [Ai2], and [Ai3] are within
the range from the lower limit level to the upper
limit level of the window comparators. The analog
inputs can be monitored at any value, so that this
function can be used for detecting breaks, for
example.
Parameter
• When the signal [WCAi1], [WCAi2], or [WCAi3] is
output, the value adopted to the analog input can
be fixed to any value. Specify the value using the
break operation level [Ai1], [Ai2], or [Ai3].
• When the analog hold function [AHD] is enabled,
the input being held has higher priority.
• A hysteresis width can be specified to the upper
and lower limit levels of the window comparator.
• A level and a hysteresis width can be specified to
each of the analog inputs [Ai1], [Ai2], and [Ai3]
individually.
Item Parameter Data Description
Output terminal function
selection 11-15
[CC-01]~[CC-05]
050
051
052 The signals 050 [Ai1Dc], 051 [Ai2Dc],
and 052 [Ai3Dc] will be output to the
output terminal assigned.
Relay output terminal function
selection 16A-16C
[CC-06]
Relay output terminal function
selection AL1-AL0/AL2-AL0
[CC-07]
Output terminal function
selection 11-15
[CC-01]~[CC-05]
056
057
058
The signals
056 [WC
Ai
1], 057
[WC
Ai
2], and
058 [WC
Ai
3]
will be output to the
output terminal assigned.
Relay output terminal function
selection 16A-16C
[CC-06]
Relay output terminal function
selection AL1-AL0/AL2-AL0
[CC-07]
Window comparator
Ai1/Ai2/Ai3 upper limit level
Ai1:[CE-40]
Ai2:[CE-43]
0~100(%)
Specify the upper limits of the analog
inputs. The setting ranges are limited to
the lower limits or greater.
Ai3:[CE-46] -100~100(%)
Window comparator
Ai1/Ai2/Ai3 lower limit level
Ai1:[CE-41]
Ai2:[CE-44]
0~100(%)
Specify the lower limits of the analog
inputs. The setting ranges are limited to
the upper limits or smaller.
Ai3:[CE-47] -100~100(%)
Window comparator
Ai1/Ai2/Ai3 hysteresis width
Ai1:[CE-42]
Ai2:[CE-45]
Ai3:[CE-48]
0~10(%)
The maxim hysteresis widths are limited
to (upper limit level - lower limit level)/2.
Ai1/Ai2/Ai3 abnormal condition
analog operation level
Ai1:[CE-50]
Ai2:[CE-52]
0~100(%)
Specify the input values when the input
become within the ranges according to
their operation level selection.
Ai3:[CE-54] -100~100(%)
Ai1/Ai2/Ai3 abnormal condition
analog operation level
selection Ai1:[CE-51]
Ai2:[CE-53]
Ai3:[CE-55]
00 Disabled
01
When the enabled WC signal is in
operation (within the range)
02
When the enabled WC signal is out of
operation (beyond the range)
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