FMC Corporation - Talstar 80 - Handbuch (Seite 57)

Proline Promass 80 PROFIBUS PA Commissioning
57
SETTOT_TOTAL module
The module combination SETTOT_TOTAL (slot 5) consists of the functions SETTOT and TOTAL.
With this module combination:
• The totalizer can be controlled via the automation system (SETTOT).
• The totalizer value is transmitted including the status (TOTAL)
SETTOT function
In the SETTOT function, the totalizer can be controlled via control variables.
The following control variables are supported:
• 0 = Totalize (factory setting)
• 1 = Reset totalizer (the totalizer value is reset to 0)
• 2 = Accept totalizer preset
!
Note!
After the totalizer value has been reset to 0 or set to the preset value, the totalizing continues
automatically. The control variable does not have to be changed to 0 again to restart totalizing.
Stopping totalizing is controlled in the SETTOT_MODETOT_TOTAL module via the MODETOT
function.
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TOTAL function
For a description of the TOTAL function, refer to TOTAL module
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Data structure of the SETTOT_TOTAL module combination
SETTOT_MODETOT_TOTAL module
The module combination SETTOT_MODETOT_TOTAL (slot 5) consists of the functions SETTOT,
MODETOT and TOTAL.
With this module combination:
• The totalizer can be controlled via the automation system (SETTOT).
• The totalizer can be configured via the automation system (MODETOT).
• The totalizer value is transmitted including the status (TOTAL)
SETTOT function
For a description of the SETTOT function, refer to SETOT_TOTAL module.
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MODETOT function
In the MODETOT function, the totalizer can be configured via control variables.
The following settings are possible:
• 0 = Balance (factory setting), calculates the positive and negative flow portions
• 1 = calculates the positive flow portions
• 2 = calculates the negative flow portions
• 3 = Totalizing is stopped
!
Note!
For the calculation of the positive and negative flow components (control variable 0) or the negative
flow components only (control variable 2) to be carried out correctly, the option BIDIRECTIONAL
must be active in the MEASURING MODE function.
Output data Input data
SETTOT TOTAL
Byte 1 Byte 1 Byte 2 Byte 3 Byte 4 Byte 5
Control Totalizer value (IEEE 754 floating point number) Status