Hitachi SJ Series User Manual page 427

Chapter 12
12.22.2 Detecting break and out-of-range
errors at expansion option terminals
Ｑ
• I want to detect break errors at analog inputs when
an expansion option is used.
• I want to maintain a constant speed even when a
break or short-circuit error occurs.
Ａ
• Assign the output terminal functions 053 [Ai4Dc],
054 [Ai5Dc], and 055 [Ai6Dc] 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 [Ai4] (Vi4,Ii4), [Ai5] (Vi5,Ii5), and
[Ai6] (Vi6,Ii6) 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
Item
Output terminal function
selection 11-15
Relay output terminal function
selection 16A-16C
Relay output terminal function
selection AL1-AL0/AL2-AL0
Output terminal function
selection 11-15
Relay output terminal function
selection 16A-16C
Relay output terminal function
selection AL1-AL0/AL2-AL0
Window comparator
Ai4/Ai5/Ai6 upper limit level
Window comparator
Ai4/Ai5/Ai6 lower limit level
Window comparator
Ai4/Ai5/Ai6 hysteresis width
Ai4/Ai5/Ai6 abnormal condition
analog operation level
Ai4/Ai5/Ai6 abnormal condition
analog operation level
selection
Parameter
[CC-01]~[CC-05]
[CC-06]
[CC-07]
[CC-01]~[CC-05]
[CC-06]
[CC-07]
Ai4:[oE-35]
Ai5:[oE-38]
Ai6:[oE-41] -100~100(%)
Ai4:[oE-36]
Ai5:[oE-39]
Ai6:[oE-42] -100~100(%)
Ai4:[oE-37]
Ai5:[oE-40]
Ai6:[oE-43]
Ai4:[oE-44]
Ai5:[oE-46]
Ai6:[oE-48] -100~100(%)
Ai4:[oE-45]
Ai5:[oE-47]
Ai6:[oE-49]
12-22-4
！
• When the signal [WCAi4], [WCAi5], or [WCAi6] is
output, the value adopted to the analog input can
be fixed to any value. Specify the value using the
break operation level [Ai4], [Ai5], or [Ai6].
• 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 [Ai4] (Vi4,Ii4), [Ai5]
(Vi5,Ii5), and [Ai6] (Vi6,Ii6) individually.
• For details, refer to the instruction manual
provided together with the optional device.
Data
053 The signals 053 [Ai4Dc], 054 [Ai5Dc],
054 and 055 [Ai6Dc] will be output to the
055 output terminal assigned.
059 The signals 059 [WCAi4], 060 [WCAi5],
060 and 061 [WCAi6] will be output to the
061 output terminal assigned.
Specify the upper limits of the analog
0~100(%)
inputs. The setting ranges are limited to
the lower limits or greater.
Specify the lower limits of the analog
0~100(%)
inputs. The setting ranges are limited to
the upper limits or smaller.
The maxim hysteresis widths are limited
0~10(%)
to (upper limit level - lower limit level)/2.
Specify the input values when the input
0~100(%)
become within the ranges according to
their operation level selection.
00 Disabled
When the enabled WC signal is in
01
operation (within the range)
When the enabled WC signal is out of
02
operation (beyond the range)
Inverter Function
Description