PR5230 Instrument Manual
Fieldbus Interface
Sartorius
EN-167
9.2
Description of the I/O Area (Read / Write Window)
9.2.1
Input Area
Data transmission from the master to the PR5230 (slave) is via the input area.
Weight or data requests are transmitted to the slave by the master.
The master has write access; the slave has read access.
Byte Name
Description
0
Write_Value (MSB)
e.g. limit value
1 :::
"
2 :::
"
3 Write_Value
(LSB)
"
4
Read_Value_Select
e.g. gross weight
5 Write_Value_Select
Write:
Limit 1 On
6
free
Res M3 Res M2 Res M1 free
Set M3 Set M2 Set M1
Free/digital outputs
7 Get
FixTare
Set
FixTare
Res
Power
Res Test Set
Test
Res
Tare
Set
Tare
Set Zero
Control byte,
response to
0->1
transition
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 3
Bit 1
Bit 0
The
control byte
activates the corresponding action in the instrument with a set bit.
After execution of the operation, the bit should be reset.
Variable
Function
Write_Value
The weight value is transmitted as a binary 32-bit value with plus or minus sign
Data type:
DINT
Read_Value_Select For selecting the value sent by the instrument
Write_Value_Select For selecting the function to be executed by the instrument
GetFixTare
Reset marker 1…3.
SetFixTare
Set marker 1…3.
ResPower
The gross weight is copied into the fixtare memory.
ResTest
Taring is performed using the value stored in the fixtare memory.
SetTest The
Power_Fail
bit in the output area is deleted.
ResTare
The test operating mode is finished.
SetTare
The test operating mode is started. Now the test value can be read out by reading the
gross weight.
SetZero
Tare is reset.
Res M1…3
Marker 1…3 is reset
Set M1…3
Marker 1…3 is set
