S+S Regeltechnik THERMASGARD Série Notice D'instruction page 31

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EtherCAT P | Configuration (pressure)
MODULE PRESSURE ( SDO ) continued
Object DataType
0x80n1
USINT
BIT6
BIT3
0x80n2 REAL
0x90n0 STRING (20)
0x90n1 STRING (8)
0x90n2
UINT
USINT
UINT
Sample time for sampling interval ( 0x80n1 )
Value
0 Default
1...5 50, 100, 150, 200, 250 ms
6...12 300, 400, 500, 600, 700, 800, 900 ms
13...19 1.0, 1.5, 2.0, 2.5, 3.0, 4.5, 5.0 s
Description MODULE PRESSURE
The current differential pressure value with its historical minimum and maximum values is queried by the TxPDOs Pressure Value and
Pressure History (equivalent to the data objects 0x60n0 and 0x60n1).
The TxPDO Pressure Service is subdivided into the Maintenance object (maintenance information) and Pressure Status (measured
value information). In the Maintenance object (equivalent to the data object 0x60n2), dynamic ageing is displayed depending on the
working point of the sensor as a recommended number of remaining operation hours until the next recalibration. (Rem.: This value is
informative and is reset via the service interface). The Pressure Status object (equivalent to the data object 0x60n3) provides
information about the validity status of the measured value. During normal operation, this register switches between 0 and 1 for each
measured value determined. In case of over/underflow of measuring range or error detection, the corresponding code number is
displayed (see table).
The RxPDO Noise Reduction (equivalent to the data object 0x70n0) uses the definition of the Middle Value and associated Tolerance
Band to enable a smooth display of the measured value in the specified tolerance band. This function is switched on by means of
Enable. If the measured value is within the tolerance band, the middle value is used as an output value.
The configuration object Pressure Display ( 0x80n0 ) sets the display behaviour of the bar graph and LCD. In this case, the value range
of the bar graph can be defined using the start point Bar Graph Minimum Value and the end point Bar Graph Maximum Value, and its
colour (standard white) edited. Refer to the bar graph module for the colours Level OK, Level WARN and Level ERR. If it is not
available, green, yellow and red are used as specified colours. A system-specific display text (7 characters) for the lower line can also
be specified.
In the Pressure Adjust object, a pressure zero-point comparison can be performed manually. On devices not fitted with an auto-zero
valve, the pressure connections must be connected to one another by a section of hose. The AutoZero bit is then set to start the
comparison process, which lasts for approx. 20 seconds. The AutoZero bit must then be reset.
The Measurement Configuration ( 0x80n1 ) object defines the setting for recording the measured value. The sample interval, the filter
midpoints and the time interval for the historical data are specified here. Depending on the measurement requirement, data filtering
can be set very precisely. The settling time is derived by multiplying the sample time with the number of filter points. The viewing
period for recording the minimum/maximum value and an optional offset configuration for the measured value correction can be defined
here.
The Pressure Description ( 0x90n0 ) object contains the module description in text form, the Pressure Unit ( 0x90n1 ) object displays
the measurand unit and the Pressure Configuration ( 0x90n2 ) object provides information about the set measurement configurations
in the corresponding time units.
Name
Measurement Configuration
Sampling Intervall
Filtering Number
History Time Intervall
Pressure Offset
Pressure Description
Pressure Unit
Pressure Configuration
Sample Time (ms)
Filtering Number (n)
History Time (min)
Description
0: Default
1- 5: 50–250 ms in 50 ms steps
6–12: 300–900 ms in 100 ms steps
13–19: 1–5 s in 500 ms steps
Number of filter values
0: 0.5 h
1: 1 h
2: 6 h
3: 12 h
4: 24 h
5–7: –
Manual Offset
'Device Differential Pressure' information text
Unit information text
Sample time in ms
Filter number of entries
Min/max interval time in min
Steps
Default value of sensor
50-250 ms @ 50 ms steps
300-900 ms @ 100 ms steps
1-5 s @ 500 ms steps
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