COMMISSIONING / OPERATION
4
23
H250 M40 ESK4
www.krohne.com
03/2014 - 4002251801 - AD H250/M40 PROFIBUS R01 en
Coding of ModeTot
4.7 Diagnosis
The ESK4-PA transmitter performs internal self-tests. The results are provided as detailed
diagnosis information according to PA Profile 3.02. This diagnosis information is available via
several parameters and can be read by an engineering tool (e.g. DD/DTM). In addition the
diagnosis information is transferred via cyclic services towards the control system (e.g. PLC).
Diagnosis is bitwise coded. Therefore it is possible to report more than one indication
simultaneously. The GSD file contains a text for each diagnosis bit in order to provide a text
message in the control system. The references are defined by the UNIT_DIAG_BIT(i) entries.
They show which bit is set to indicate a special diagnosis event.
The amount and content of the diagnosis information depends on the device configuration. The
active Ident. Number and the selected status and diagnosis mode will influence diagnosis
propagation. The following tables show the diagnosis events which are reported for different
settings. The bit number is equal to the counting within the GSD file. It represents the position in
the device-related diagnostic field of the Slave_Diag service.
ModeTot = 0
True arithmetic integration of the incoming rate
values.
ModeTot = 1
Totalization of positive incoming rate values only.
ModeTot = 2
Totalization of negative incoming rate values only.
ModeTot = 3
Totalizer is stopped, no totalization is done.
ModeTot = 248
All incoming rates will be handled as positive values;
i.e. negative input values will be multiplied with "-
1.0".
ModeTot = 249
All incoming rates will be handled as negative
values; i.e. positive input values will be multiplied
with "-1.0".
Other values are not accepted for ModeTot. Values are ignored; totalizer remains in its last valid setting.
INFORMATION!
Take care that SetTot and ModeTot are level sensitive parameters; e.g. if SetTot is changed from
‘
0
’
to
‘
1
’
the totalizer is reset and stopped. It will not start counting before SetTot is reset to
‘
0
’
via
the control system or an engineering tool. It is not reset by the ESK4-PA transmitter itself.
AD_H250_M40_PB_PA_R01_en_4002251801_PRT.book Page 23 Friday, March 21, 2014 1:14 PM
