Hach-Lange SC 200 Profibus network card User Manual - Manual (Page 10)

When the manual configuration is selected, the telegram data structure
can be configured by the user (refer to
Setup the network on page 8).
Table 2 Profibus data telegram structure
Byte number Data Data type
1–2 Classified error Integer (2 bytes)
3–4 Classified status Integer (2 bytes)
5–8 Measurement 1 Floating (4 bytes)
9–12 Measurement 2 Floating (4 bytes)
13–16 Measurement 3 Floating (4 bytes)
Display values
The Profibus data block structure (
Profibus message data block
structure ) can replace sc probes without changes in the PLC configuration.
The primary value is always the measured value.
The secondary value, if not available, is filled with zero.
The tertiary value, if not available, is filled with zero.
Figure 2 Profibus message data block structure
Process data controller block
The data block for the sc controller is similar to the data block for sensors.
The structure of the sc controller data block is independent of the number
of connected sensors:
• sc controller_ERROR
• sc controller_STATUS
• Primary value
• Secondary value
• Tertiary value
Block 3 sc controller ERROR and Block 3 sc controller STATUS show the
data definitions for error and status 1 in the sc controller.
Table 3 Block 3 sc controller ERROR
Bit Error Note
0 Sensor 1 communication
error A communication error has occurred
between the sc controller and sensor 1, the
sensor could be disconnected.
1 Sensor 2 communication
error A communication error has occurred
between the sc controller and sensor 2, the
sensor could be disconnected.
2–15 Not used
Table 4 Block 3 sc controller STATUS
Bit Status1 Note
0 Sensor 1 installed First sensor has been installed to the sc controller. This
bit is set even if the sensor is disconnected after
installation.
1 Sensor 2 installed Second sensor has been installed to the sc controller.
This bit is set even if the sensor is disconnected after
installation.
2 Relay A on
3 Relay B on
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