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Profibus Interface
optoNCDT ILR 1183
7.5
Cyclical Data Exchange – Output (Master -> Slave)
The most significant bit in a preset value (bit 32) defines the validity of that preset.
Octet
Bit
Type
Output
1…4
signed 32
Preset value
Standard mode: MSB = 0 (bit 31)
Preset mode: MSB = 1 (bit 31)
The “Preset“ value is available for setting a current output value to a desired value. This is achieved with the
help of an internal offset M
offset
. By setting of bit 31, this offset value can be changed. The following assign-
ments are valid:
M
DataEx
value transported to the Profibus in cyclical data exchange mode
M
Laser
reading determined by the laser
M
offset
intern calculated offset value
M
Preset
value transferred with “Preset“ function
- Cyclical calculation of: M
DataEx
= M
Laser
+ M
offset
- The value for M
offset
is not permanently stored in the sensor, that means, it will be lost on turning power off.
The offset value can also be stored as a parameter in Octet 32 ... 35.
- If bit 31 of M
Preset
is set, M
Offset
will be calculated in such a manner that the following equation is met:
M
Preset
= M
Laser
+ M
offset
The new offset value can be read in the diagnostic data as Octet 30 ... 33.
Содержание optoNCDT ILR 1183
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