System integration Deltabar PMD75B PROFINET with Ethernet-APL
42 Endress+Hauser
8.3 Cyclic data transmission
8.3.1 Overview of the modules
The following graphic shows which modules are available to the device for cyclic data
exchange. Cyclic data exchange is performed with an automation system.
Device
Direction
Data flow
Control system
Modules Slot
Analog input (Pressure) 1 →
PROFINET
Analog input (Scaled variable) 20 →
Analog input (Sensor temperature) 21 →
Analog input (Sensor pressure) 22 →
Analog input (Electronics temperature) 23 →
Analog input (Median of pressure signal) 24 →
Analog input (Noise of pressure signal) 25 →
Binary input (Heartbeat Technology) 80 →
Binary input (SSD: Statistical Sensor Diagnostics) 81 →
Binary output (Heartbeat Technology) 210 ←
BinaryInput Sensordiagnostics Slot 81
Bit Function Description
0 Process alert pressure Process alert pressure detected.
1 Process alert scaled variable Process alert scaled variable detected.
2 Process alert temperature Process alert temperature detected.
3 Low signal noise detected Low signal noise detected
4 High signal noise detected High signal noise detected
5 Min signal noise detected Min signal noise detected
6 Out of range signal detected Out of range signal detected
7 - -
8.3.2 Description of the modules
The data structure is described from the perspective of the automation system:
• Input data: are sent from the device to the automation system
• Output data: are sent from the automation system to the device
Analog Input module
Transmission of input variables from the device to the automation system:
Analog Input modules cyclically transmit the selected input variables, including the status,
from the device to the automation system. The input variable is depicted in the first four
bytes in the form of a floating point number as per the IEEE 754 standard. The fifth byte
contains status information pertaining to the input variable. The "Pressure" Analog Input
module in Slot 1 is contained in the pressure PA PROFILE GSD. The other Analog Input
modules can only be used with the manufacturer GSD.
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