VEGA RS232_Ethernet connection - Manual (Page 15)

15
6 PC/DCS values
RS232/Ethernet connection • VEGAMET 391/624/625, VEGASCAN 693, PLICSRADIO C62
30325-EN-130701
6 PC/DCS values
6.1 General information
PC/DCS outputs are used as digital outputs for transmission of meas-
ured value information. The data can be transmitted to a superordi-
nate PC, DCS or processing system via the RS232/Ethernet interface.
The values can be sent e.g. as e-mail or read out via Modbus TCP in
case of an existing Ethernet interface. The HTML pages of the signal
conditioning instrument also show the measured values of the PC/
DCS outputs. The adjustment of the data format and the reference
value is carried out with PACTware and the corresponding DTM. In
the parameter adjustment page "PC/DCS" the reference value and
the data format are selected; in addition, the option "In case of error:
transmit error code instead of measured value" can be activated.
With the reference value you determine which measured value is
used as input signal for the PC/DCS output. The following reference
values are available depending on the instrument:
•
Sensor value
•
Percent
•
Lin. percent
•
Scaled
•
Totalizer
With "Data format", the format of the PC/DCS value is determined.
Here you determine how many decimal positions will be transmitted.
This setting is important, e.g. with Modbus-TCP (filing of the meas-
ured value as 2 Byte short). The PC/DCS value is then transmitted in
the integer format, i.e. the value must be within the range of -32767
and +32767.
Example: The sensor value of a pressure transmitter should be
transmitted as PC/DCS value. The meauring range of the sensor is
between -0.5 bar and +0.5 bar, the value should be transmitted with
two positions after the decimal point. The following settings must
be carried out: The sensor value must be selected as "Basic meas.
value" and the selection #.## as "Data format". With these settings,
the sensor value -0.5 bar is transmitted as PC/DCS value -0.5 bar.
If " In case of error: send error code instead of measured value " is ac-
tivated, the number of the error code is sent instead of the measured
value. These numbers correspond to the numbers of the instrument
status.
Example: With error E008, value 8 is transmitted instead of the meas-
ured value.
Reference value
Data format
Fault