Endress+Hauser iTEMP TMT 165 FOUNDATION Fieldbus Betriebsanleitung Seite 100

6 Commissioning
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100
Caution!
Note that with the type of linearisation 'Direct' the configuration of the parameter
group OUT_SCALE must agree with the configuration of the parameter group
XD_SCALE. Otherwise the block operating mode cannot be set to AUTO. Such
incorrect configuration is indicated via the parameter BLOCK_ERROR (Block Con-
figuration Error).
21. Use the following parameters to define the limit values for alarm and warning mes-
sages:
– HI_HI_LIM → limit value for the upper alarm
– HI_LIM → limit value for the upper warning
– LO_LIM → limit value for the lower warning
– LO_LO_LIM → limit value for the lower alarm
The limit values entered must be within the value range specified in the parameter
group OUT_SCALE.
22. In addition to the actual limit values you must also specify the action taken if a limit
value is exceeded using so-called 'alarm priorities' (parameters HI_HI_PRI, HI_PRI,
LO_PR, LO_LO_PRI)
Reporting to the fieldbus host system only takes place if the alarm priority is higher
than 2.
23. System configuration/connection of function blocks:
A concluding 'overall system configuration' is essential so that the operating mode
of the Analogue Input Function Block can be set to AUTO and so that the field
device is integrated into the system application.
To do this, configuration software such as the NI-FBUS Configurator from National
Instruments is used to connect the function blocks to the desired control strategy –
generally graphically – and then the sequence of the individual process control
functions is specified.
24. After specifying the active LAS, download all the data and parameters into the field
device.
25. Set the operating mode in the parameter group MODE_BLK (parameter TARGET)
to AUTO. However, this is only possible if two conditions are met:
– The function blocks are correctly connected with each other.
– The Resource Block is in operating mode AUTO.
FOUNDATION Fieldbus temperature transmitter
Endress+Hauser