Communication / PROFIBUS 09.2008
6SE7087-6QX70 (Version AK) Siemens AG
8.2-18 Compendium Motion Control SIMOVERT MASTERDRIVES
♦ You can operate a SIMATIC OP together with a drive, irrespective of
any automation system which may be present. A simple "point-to-
point" connection with only two nodes is possible.
♦ The "Variable" OP functions can be used for drives. Other functions
cannot be used (e.g. "Messages" or "Recipes").
♦ Access is possible to individual parameter values. Access is not
possible to whole arrays, descriptions or texts.
♦ The parameter values transferred to the OP are the non-standardized
internal values of the drive. You can influence the value displayed on
the OP with "Functions" in Pro Tool (e.g. "Linear conversion").
♦ The diagnostic output on the SIMATIC OP is limited. In the case of
unsuccessful attempts at access, the CB diagnostic parameter,
r732.22. and the following can help you further. See Section
"Diagnosis and Troubleshooting".
8.2.3 Mechanisms for processing parameters via the PROFIBUS
With the PKW mechanism (for PPO types 1, 2 and 5 and when the
acyclical channels, MSAC_C1 and MSAC_C2, are used), you can
perform the following tasks:
♦ Handling and visualizing parameters (read/write)
♦ Transferring and acknowledging parameter change reports (not
realized)
The parameter area always contains at least 4 words.
Parameter ID (PKE) 1
st
word
Bit No.: 15 12 11 10 0
AK SPM PNU
Parameter index (IND) 2
nd
word
Bit No.: 15 8 7 0
The structure and significance depend on the type of data
transfer (see following pages)
Parameter value (PWE)
Parameter value High (PWE1) 3
rd
word
Parameter value Low (PWE2) 4
th
word
AK:
SPM:
PNU:
Task ID or reply ID
Toggle bit for processing the parameter change report
Parameter number
Table 8.2-3 Structure of the parameter area (PKW)
NOTES
Parameter area
(PKW)
To Next Page
Loading...
Need help?
General