The values that you can set for hardware interrupts (high/low limit) must not exceed the
respective rated measuring range.
The following tables list the valid hardware interrupt limits. The limit values depend on the
selected measuring type and range.
Table B- 4 Limits of hardware interrupts for voltage and currentThis chapter shows the analog values for all measuring ranges supported by the AI 8xU/I HS
analog module.
Measured value resolution
Each analog value is written left aligned to the tags. The bits marked with "x" are set to "0".
Table C- 1 Resolution of the analog valuesThe following tables set out the digitalized representation of the input ranges by bipolar and
unipolar range. The resolution is 16 bits.The following tables list the decimal and hexadecimal values (codes) of the possible voltage
measuring ranges.
Table C- 4 Voltage measuring range ±10 V and ±5 VRepresentation of analog values in the current measuring ranges
The following tables list the decimal and hexadecimal values (codes) of the possible current
measuring ranges.
Table C- 6 Current measuring range ±20 mAError events initiate a diagnostics entry and trigger a diagnostics interrupt if configured
accordingly.
Table C- 8 Measured values for wire break diagnostic
Format Parameter assignment Measured values Explanation
• "Wire break" diagnostics enabled
• "Overflow/Underflow" diagnostics
enabled or disabled
("Wire break" diagnostics takes priority
over "Overflow/Underflow" diagnostics)
32767 7FFFH "Wire break" or "Open circuit" diagnostic
alarm
• "Wire break" diagnostics disabled
• "Overflow/Underflow" diagnostics
enabled
-32767 8000 H • Measured value after leaving the undershoot
range
• Diagnostic alarm "Low limit violated"
• "Wire break" diagnostics disabled
• "Overflow/Underflow" diagnostics
disabled
-32767 8000 H Measured value after leaving the undershoot
rangeThis manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent
damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert
symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are
graded according to the degree of danger.
DANGER
indicates that death or severe personal injury will result if proper precautions are not taken.
WARNING
indicates that death or severe personal injury may result if proper precautions are not taken.
CAUTION
indicates that minor personal injury can result if proper precautions are not taken.
NOTICE
indicates that property damage can result if proper precautions are not taken.
If more than one degree of danger is present, the warning notice representing the highest degree of danger will
be used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to
property damage.
Qualified Personnel
The product/system described in this documentation may be operated only by personnel qualified for the specific
task in accordance with the relevant documentation, in particular its warning notices and safety instructions.
Qualified personnel are those who, based on their training and experience, are capable of identifying risks and
avoiding potential hazards when working with these products/systems.
Proper use of products
Note the following:
WARNING
products may only be used for the applications described in the catalog and in the relevant technical
documentation. If products and components from other manufacturers are used, these must be recommended
or approved by . Proper transport, storage, installation, assembly, commissioning, operation and
maintenance are required to ensure that the products operate safely and without any problems. The permissible
ambient conditions must be complied with. The information in the relevant documentation must be observed.
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