Endress+Hauser Proline Promag L 400 - Page 73

Proline Promag L 400 PROFIBUS DP System integration
Endress+Hauser 73
Input data of TOTAL
Byte 1 Byte 2 Byte 3 Byte 4 Byte 5
Measured value: floating point number (IEEE 754) Status
AO module (Analog Output)
Transmit a compensation value from the PROFIBUS master (Class 1) to the measuring
device.
Via the AO module, a compensation value along with the status is cyclically transmitted
from the PROFIBUS master (Class 1) to the measuring device. The compensation value 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 standardized status information pertaining to the
compensation value.
One Analog Output block is available (slot 8).
Assigned compensation values
A compensation value is permanently assigned to the individual Analog Output blocks.
CHANNEL Function block Compensation value
731 AO 1 External density
The selection is made via: "Expert" menu → Sensor → External compensation
Data structure
Output data of Analog Output
Byte 1 Byte 2 Byte 3 Byte 4 Byte 5
Measured value: floating point number (IEEE 754) Status
DI module (Discrete Input)
Transmit discrete input values from the measuring device to the PROFIBUS master (Class
1). Discrete input values are used by the measuring device to transmit the state of device
functions to the PROFIBUS master (Class 1).
The DI module cyclically transmits the discrete input value, along with the status, to the
PROFIBUS master (Class 1). The discrete input value is depicted in the first byte. The
second byte contains standardized status information pertaining to the input value.
Two Discrete Input blocks are available (slot 9 to 10).
Selection: device function
The device function can be specified using the CHANNEL parameter.
CHANNEL Device function Factory setting: state (meaning)
894 Empty pipe detection
• 0 (device function not active)
• 1 (device function active)
895 Low flow cut off
1430 Status verification
1)
1) Only available with the "Heartbeat Verification" application package