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8-7
Over Range/Under Range Detection
8-7-1
Function Applications and Overview
This function detects when the analog input signal exceeds the range for which conversion is possible.
8-7-2
Details on the Function
The operations of the over range/under range detection are described below.
• If the input signal exceeds the upper limit of the input conversion range, the converted value is fixed
at the upper limit. If this state continues for 100 ms, the Ch
£
Over Range bit in the Ch
£
Status of
I/O data turns ON and a Unit Over Range for Ch
£
event occurs. (Refer to (a) in the figure below.)
• If the input signal falls below the lower limit of the input conversion range, the converted value is
fixed at the lower limit. If this state continues for 100 ms, the Ch
£
Under Range bit in the Ch
£
Status of I/O data turns ON and a Unit Under Range for Ch
£
event occurs. (Refer to (b) in the fig-
ure below.)
• When the input signal returns to the input conversion range, the fixing is canceled and the values
become the converted values.
When the cause of the error is removed and the error is reset, the Ch
£
Over Range and Ch
£
Un-
der Range bits of the Ch
£
Status of I/O data turn OFF. (Refer to (c) in the figure below.)
• Refer to
7-1 Specifications of I/O Data
on page 7 - 2 for details on I/O data. Refer to
Codes and Corrections for Errors
on page 9 - 6 for details on events.
1
100 ms
100 ms
0
1
0
Upper limit of input
conversion range
Analog input signal
Converted
value
Error is reset
Lower limit of input
conversion range
Ch
*
Over Range bit
Ch
*
Under Range bit
(a)
(b)
(c)
8 Functions
8 - 31
NX-series Analog I/O Units User’s Manual for High-speed Analog Input Units (W592)
8-7
Over Range/Under Range Detection
8
8-7-1
Function Applications and Overview
Содержание Sysmac NX-series
Страница 4: ...Introduction 2 NX series Analog I O Units User s Manual for High speed Analog Input Units W592...
Страница 42: ...Sections in this Manual 40 NX series Analog I O Units User s Manual for High speed Analog Input Units W592...
Страница 100: ...4 Installation and Wiring 4 32 NX series Analog I O Units User s Manual for High speed Analog Input Units W592...
Страница 142: ...7 I O Data and List of Settings 7 24 NX series Analog I O Units User s Manual for High speed Analog Input Units W592...
Страница 238: ...10 Inspection and Maintenance 10 6 NX series Analog I O Units User s Manual for High speed Analog Input Units W592...
Страница 300: ...Appendices A 62 NX series Analog I O Units User s Manual for High speed Analog Input Units W592...
Страница 301: ...I Index I 1 NX series Analog I O Units User s Manual for High speed Analog Input Units W592 I...
Страница 303: ...W Wiring Terminal 4 7 Index I 3 NX series Analog I O Units User s Manual for High speed Analog Input Units W592 I...
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