KROHNE H250 M40 PROFIBUS PA - Manual (Page 22)

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COMMISSIONING / OPERATION
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H250 M40 ESK4
www.krohne.com 03/2014 - 4002251801 - AD H250/M40 PROFIBUS R01 en
• Uncertain: Uncertain: Uncertain: Uncertain: function block output value can be used but the accuracy can not be guaranteed
(e.g. function block outputs value has been frozen or A/D converter is saturated or out of
range)
• Bad: Bad: Bad: Bad: function block output value is bad - don’t use it for process control!
The "Quality-Substatus" and "Limit" bits will be used for further diagnostics or limit checking.
4.6.2 Output data
Output data is transferred from the master to the ESK4-PA transmitter to control the totalizers.
Behaviour and coding is described by the following tables.
Module types (defined in GSD):
Coding of SetTot
INFORMATION!
The status should be monitored because a number will be transmitted even if the status of the
measurement value is bad or uncertain. This is the only way to check the quality of the
transmitted measurement values.
Total cyclic transfer of the totalizer value with status to the master (no output data)
SetTot + Total cyclic transfer of the totalizer value with status to the master +
cyclic control data from master to the slave via the parameter SetTot
ModeTot + Total cyclic transfer of the totalizer value with status to the master +
cyclic control data from master to the slave via the parameter ModeTot
SetTot +
ModeTot + Total
cyclic transfer of the totalizer value with status to the master +
cyclic control data from master to the slave via the parameters SetTot and ModeTot
(in this order)
SetTot cyclic control data from master to the slave via the parameter SetTot
ModeTot cyclic control data from master to the slave via the parameter ModeTot
SetTot + ModeTot cyclic control data from master to the slave via the parameters SetTot and ModeTot
(in this order)
SetTot = 0 Totalizer is totalizing
SetTot = 1 Totalizer is reset to 0.0 and remains at this value until SetTot is reset to 0. If the
value of SetTot changes from “1” to “0” the totalizer starts counting from 0.0.
SetTot = 2 Totalizer is set to the value defined by PresetTot. PresetTot can be written via an
acyclic service (totalizer in slot 2: Slot 2, Index 32; totalizer in slot 3: Slot 3, Index
32). If the value of SetTot changes from “2” to “0” the totalizer starts counting from
the current value defined by PresetTot.
Other values are not accepted for SetTot. Values are ignored; totalizer remains in its last valid setting.
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