VEGA VEGASCAN 850 Profibus DP signal output - Manual (Page 10)

10 Profibus DP signal output VEGASCAN 850
Grouping of measured values acc. to PC/DCS output number
Block no. PC/DCS output no.
1 1...8
2 9...16
3 17...24
4 25...32
5 33...40
6 41...48
7 49...56
8 57...60
Example:
Enquiry telegram to VEGASCAN 850 (2 bytes):
0xCC 0x01 Block no. 1 is enquired
Answer telegram from VEGASCAN 850 (50 Byte):
0xCC 0x00 0x01 0xYY 0x00 0x00 0xHH 0xLL 0x02 0xYY 0x00 0x00 0xHH ...
Control word PC/DCS value no. 1 PC/DCS value no. 2
0xYY = Index-Byte
0xHH = High-Byte measured value
0xLL = Low-Byte measured value
Data image in VEGASCAN 850
5.1 Measured value image
VEGASCAN 850 can administrate up to 60
measurement loops. For transfer of the meas-
ured values of a measurement loop,
VEGASCAN provides up to 60 PC/DCS out-
puts. One or several PC/DCS outputs with
individual index can be assigned to each of
these measurement loops. The configuration
of VEGASCAN is made with the VEGA ad-
justment software VVO (see chapter "2 PC/
DCS output in VEGASCAN“).
Measured value image in mode 50E2A
In this operating mode the PC/DCS values
are imaged in blocks (VEGASCAN) depend-
ing on the PC/DCS output number.
The assignment of the individual PC/DCS
values in blocks is shown as diagram. For
readout of the measured values from
VEGASCAN, the Profibus master has to send
a control command to VEGASCAN.
2 Byte
output range
Byte 1 Byte 2
Control
command
Block no.
0xCC
0x01
...0x08
Measured value enquiry of the Profibus master
Control command 0xCC:
When enquiring with this control command,
the PC/DCS values will be grouped in as-
cending sequence acc. to the PC/DCS out-
put number. The measured value image is
always sorted acc. to the PC/DCS output
number.
Enquiry of measured values:
DP master: Control command:0xCC
Block no.:
0x01...0x08
5 Data image in VEGASCAN 850