09.2008 Communication / PROFIBUS
Siemens AG 6SE7087-6QX70 (Version AK)
SIMOVERT MASTERDRIVES Compendium Motion Control 8.2-97
8.2.9.5 Setpoints / Actual values
Both the setpoints on the drives and the actual values from the drives are
transmitted as PZD (process data). Process data transmission takes
place by means of the Data Exchange Service.
All the abbreviations for the standard telegrams are explained below.
Abbreviation Meaning Length
[16-/32-Bit]
Description
STW1 Control word 1 16 see section 8.2.9.3
ZSW1 Status word 1 16 see section 8.2.9.4
STW2 Control word 2 16 see section 8.2.9.3
ZSW2 Status word 2 16 see section 8.2.9.4
NSOLL_A Speed setpoint A 16
NIST_A Speed actual value A 16
NSOLL_B Speed setpoint B 32
NIST_B Speed actual value B 32
G1_STW Encoder-1 control word 16 see section 8.2.9.9
G1_ZSW Encoder-1 status word 16 see section 8.2.9.9
G1_XIST1
Encoder-1 position
actual value-1
32 see section 8.2.9.9
G1_XIST2
Encoder-1 position
actual value-2
32 see section 8.2.9.9
G2_STW Encoder-2 control word 16 see section 8.2.9.9
G2_ZSW Encoder-2 status word 16 see section 8.2.9.9
G2_XIST1
Encoder-2 position
actual value-1
32 see section 8.2.9.9
G2_XIST2
Encoder-2 position
actual value-2
32 see section 8.2.9.9
XERR Control error 32
KPC
Position controller gain
factor
32
Table 8.2-16 Standard signals– Abbreviations
Standard telegrams, see Subsection 8.2.7.3.
Standard signals
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