Sentek LMC-J-0040-1 Bedienungsanleitung PDF herunterladen (Seite 19)

IMJ00503 V3E.DOC Page 19 of 40 19.02.2009

4.5.9.4. Configuration Data

For input and output data, the following configurations are available:

mandantory

class 1 D1 hex 2 words inputs consistency

class 2 F1 hex 2 words of input data, 2 words of output data for preset

value, consistency

optional

class 1 D0 hex Not implemented in LMCJ0043

class 2 F0 hex Not implemented in LMCJ0043

4.5.9.5. Cyclical Data Exchange – Input (Slave > Master)

The LMC J 0050 3 outputs position data which are mathematically signed. The SF (scale factor)

parameter can be used to invert a given mathematical sign. Resolution is also defined via SF.

Octets in a telegram are arranged in a Profibus compliant manner (big endian), i.e. the MSB

always comes first and the LSB is always the last one.

Octet Bit Type Output

1….4 signed 32 Position datas from Encoder

4.5.9.6. 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

Normal 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 assignments are valid:

DataEx

value transported to the Profibus in cyclical data exchange mode

Laser

reading determined by the laser

offset

intern calculated offset value

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 LMC J 0043, i.e. 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.

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 ... 38 39

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