2.12 Process data control
2.12.1 PAD_Steuerung
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2.12 Process data control
This function emulates the process data, which are transmitted via the process data channel, on the communication objects.
The COMPAX process data channel has a width of 2, 4 or 6 bytes; depending on the value in parameter 196. Each byte can be
read and written by COMPAX.
The data read by COMPAX from the process data channel are called process output data (PA data). The data written by
COMPAX into the process data channel are called process input data (PE data).
Through the emulation of COMPAX communication objects to the PE data, the latter are cyclically read on the process data
channel. The PA data which are emulated to a COMPAX communication object cyclically describe this object.
The allocation of process data to certain communication objects is determined by the objects "PE_SELECT" and "PA_SELECT"
(the objects "IN_SELECT" and "OUT_SELECT" are previous names).
Both objects "PED_INI" and "PAD_INI" determine which allocation shall be valid after Power-On (this corresponds to the
settings through the COMPAX - Parameter).
The PA data can be enabled or disabled with the objects "OUT_ENABLE" or "PA_ENABLE".
After Power On the PA data are enabled!
2.12.1 PAD_Steuerung
The process output data can be used to cyclically write to the following COMPAX communication objects.
Object name Description Index
COMPAX -
Parameter
2
Byte see
dec hex
P139 ... P142
Number page
STEUERBYTE Control byte 24526 0x5fce 1 17
STEUERWORT Control word 24640 0x6040 2 19
CPX_STW COMPAX control word/virtual inputs 24530 0x5fd2 2 18
CONTROL Control commands 24553 0x5fe9 1 22
LAGE_ZIEL Target position default 24698 0x607a 4 33
SPEED Traverse speed 24556 0x5fec 2 41
OVERRIDE Reduce traverse speed 24558 0x5fee 1 41
OUTPUT_WORD 16 Dig. Set/reset outputs 24567 0x5ff7 2 51
START_N Execute program record N 24564 0x5ff4 1 60
START_N_GO Program start beginning at record N 24549 0x5fe5 1 61
OBJECT_REQ Read and write objects through PAD 24517 0x5fc5 6276352 6 65
Because the PAD channel has a max. length of 8 bytes, it is not possible to have simultaneous access all the objects listed
here. This means you need to make an appropriate selection.
2
Index * 256 + Sub-index
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