VEGA VEGABAR 65 Profibus PA - Manual (Page 47)

? When an additional instrument is connected, the segment fails.
l Max. supply current of the segment coupler exceeded
à Measure the current consumption, reduce size of segment
? Wrong presentation of the measured value in Simatic S5
l Simatic S5 cannot interpret the number format IEEE of the
measured value
à Insert converting component from Siemens
? In Simatic S7 the measured value is always presented as 0
l Only four bytes are consistently loaded in the PLC
à Use function component SFC 14 to load 5 bytes consistently
? Measured value on the indicating and adjustment module does not
correspond to the value in the PLC
l The menu item "Display - Display value" is not set to "PA-Out"
à Check values and correct, if necessary
? No connection between PLC and PA network
l Incorrect adjustment of the bus parameter and the segment
coupler-dependent baud rate
à Check data and correct, if necessary
? Instrument does not appear during connection setup
l Profibus DP cable pole-reversed
à Check cable and correct, if necessary
l Incorrect termination
à Check termination at the beginning and end points of the bus
and terminate, if necessary, according to the specification
l Instrument not connected to the segment, double assignment
of an address
à Check and correct, if necessary
In Ex applications, the regulations for the wiring of intrinsically safe
circuits must be observed.
? E 013
l no measured value available 9)
à Exchange instrument or return instrument for repair
? E 017
l Adjustment span too small
à repeat with modified values
9) Fault message can also appear if the pressure is higher than the nominal
range.
Checking Profibus PA
Fault messages via the
indicating/adjustment
module
VEGABAR 65 • Profibus PA 47
8 Maintenance and fault rectification
28253
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EN
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