4 Analog Input function block PROline Prosonic Flow 93 FOUNDATION Fieldbus
162 Endress+Hauser
The MODE_BLK parameter group, (see Page 177), is used to select the operating
mode of the Analog Input function block.
If the MAN (manual) operating mode is selected then the output value OUT,
(see Page 177), can be specified directly.
The output value OUT is compared with warning and alarm limits, (e.g. HI_LIM,
LO_LO_LIM, etc.), that can be entered via various parameters. If one of these limit
values is violated then a limit value process alarm, (e.g. HI_ALM, LO_LO_ALM, etc.), is
triggered.
The most important functions and parameters of the Analog Input function block are
listed below. An overview of all the parameters available is provided on Page 167 ff.
4.2 Selecting the operating mode
The operating mode is set by means of the MODE_BLK parameter group,
(see Page 177). The Analog Input function block supports the following operating
modes:
• AUTO
• MAN
• OOS
Note!
The OOS operating mode is also displayed via the BLOCK_ERR parameter,
(see Page 170). In the OOS operating mode, you can access all the write parameters
without restriction if write protection is not enabled.
4.3 Selecting the process variable
Prosonic Flow 93 FOUNDATION Fieldbus has eight Analog Input function blocks. The
Transducer Block process variables that are to be processed are assigned via the
CHANNEL parameter, (see Page 171).
• CHANNEL = 2 → Volume flow channel 1
• CHANNEL = 21 → Sound velocity channel 1
• CHANNEL = 23 → Flow velocity channel 1
• CHANNEL = 30 → Signal strength channel 1
• CHANNEL = 20 → Volume flow channel 2
• CHANNEL = 22 → Sound velocity channel 2
• CHANNEL = 24 → Flow velocity channel 2
• CHANNEL = 31 → Signal strength channel 2
• CHANNEL = 7 → Totalizer 1
• CHANNEL = 8 → Totalizer 2
• CHANNEL = 9 → Totalizer 3
• CHANNEL = 25 → Average volume flow
• CHANNEL = 26 → Volume flow sum
• CHANNEL = 27 → Volume flow difference
• CHANNEL = 28 → Average sound velocity
• CHANNEL = 29 → Totali z er 1