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Commissioning
5.5
Basic function principles/functional description
WARNING: Danger for persons through electric shock!
For voltages greater than 25 V AC (42 V peak) or 60 V DC the fuse opening must be covered by an
additional terminal or the EL9011 end terminal. Risk of electric shock!
The fuse may only be changed if the Bus Terminal is in a safe, de-energized state.
ATTENTION: Risk of damage to the device!
The 10 A branch is not fuse-protected. The device may be damaged if the current in the 10 A section
exceeds 10 A.
5.5.1
Measuring ranges and output
New measurement readings are available when the toggle bit (index 0x6000:10 [} 158]) changes its state (0-
>1, 1->0). In the event of an error (usually measuring range exceeded) the respective error bits [} 168] are
set. New measurement values are provided approx. every 0.5 seconds. The filter time is reset if the
measuring range is changed via Autorange or by the user during the filter period. If the value fluctuates too
much in Autorange mode, it may not be possible to determine a new measured value. As a remedy the filter
can be deactivated.
The terminal has an extended measuring range, if a larger measuring range is available (Example: 30 V
range, extended measuring range is 300 V). In Autorange mode the extended measuring range is used as a
hysteresis range. In the extended measuring range overflow and underflow bits and the error bit are set at
115% of the normal measuring range.
RMS value in the AC measuring range
In AC mode only the RMS value of AC voltage is shown (no DC component).
Error bits
Error bits are "Underrange" (index 0x6000:01 [} 158]) and "Overrange" (index 0x6000:02 [} 158]),
"Data invalid" (index 0x6000:04 [} 158]) and "TxPDO State" (index 0x6000:0F [} 158]). The Error bit
(index 0x6000:07 [} 158]) is set together with these bits. In some cases several bits may be set
simultaneously in the event of an error (e.g. "Overrange" and "Data invalid"). See also section "Error
handling and diagnostics [} 168]".
Error compensation
Since the terminal integrates the input value over an interval of 20 ms (16.66 ms in 60 Hz mode),
superimposed interferences of the input values from the supply network can largely be
compensated.
5.5.2
Selecting a measuring range
Selecting a measuring range (index 0x8000:0D [} 155], 0x8000:11 [} 155])
The measuring range can optionally be selected via the process data (default) or via CoE. If the SAI Range
Output process data are used, the measuring range is selected from these data. To select the measuring
range via CoE, deselect the process record 0x1600 [} 160] (TwinCAT System Manager -> Process Data tab,
Sync Manager: 2, PDO assignment, then press the Reload button or F4 to accept the setting). Otherwise the
CoE entries are write-protected. Selecting the measuring range via CoE or the process data has the same
effect; "Mode" (index 0x8000:0D [} 155]) selects the measurement type, "Range" (index 0x8000:11 [} 155])
selects the measuring range:
144
WARNING
NOTICE
Version: 3.0
EL3681
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