Endress+Hauser iTEMP TMT85, Руководство по эксплуатации

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Operation via FOUNDATION Fieldbus TM
iTEMP TMT85
74 Hauser
used to specify which process variable is read in and processed in the downstream Analog
Input function block.
Block Process variable Channel parameter (AI Block) Channel
Transducer Block “Sensor 1” Primary Value Primary Value 1 1
Sensor Value Sensor Value 1 3
Device temperature value Device temperature 5
Transducer Block “Sensor 2” Primary Value Primary Value 2 2
Sensor Value Sensor Value 2 4
Device temperature value Device temperature 6
14.3.2 Selecting the operating mode
The operating mode is set via the MODE_BLK parameter group (→  75).
The Transducer Block supports the following operating modes:
• AUTO (automatic mode)
• OOS (out of service)
• MAN (manual mode)
The OOS block status is also shown via the BLOCK_ERR parameter (→  75).
14.3.3 Alarm detection and processing
The Transducer Block does not generate any process alarms. The status of the process
variables is evaluated in the downstream Analog Input function blocks. If the Analog Input
function block receives an input value that cannot be evaluated from the Transducer Block,
a process alarm is generated. This process alarm is displayed in the BLOCK_ERR parameter
of the Analog Input function block (BLOCK_ERR = Input Failure).
The BLOCK_ERR parameter of the Transducer Block (→ →  75) displays the device
error that produced the input value that could not be evaluated and thus triggered the
process alarm in the Analog Input function block.
14.3.4 Accessing the device-specific parameters
To access the manufacturer-specific parameters, the hardware write protection must be
disabled, see →  26.
14.3.5 Selecting the units
The system units selected in the Transducer Blocks do not have any effect on the desired
units which should be transmitted via the FOUNDATION Fieldbus interface. This setting is
made separately via the corresponding AI Block in the XD_SCALE parameter group. The
unit selected in the Transducer Blocks is only used for the onsite display and for displaying
the measured values within the Transducer Block in the relevant configuration program. A
detailed description of the Analog Input (AI) function block is provided in the
FOUNDATION Fieldbus™ Function Block Manual on the CD-ROM provided (BA00062S/
04).