01/2007
8.9 DP slave: SINAMICSS120
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© Siemens AG 2007 All Rights Reserved
SINUMERIK 840Di sl Manual (HBIsl) – 01/2007 Edition
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DP master
The DP master periodically transfers the isochronous process data to/from DP
slaves S120 based on the configuration set in SIMATIC STEP 7 HW Config:
PROFIBUS address: 10
Object I/O address Message frame
1 4100 102
2 4140 102
3 4180 102
Transferring process data to DP slave S120
The process data for the machine axes are read from the configured I/O ad-
dresses by the DP master and transferred to the DP slave S120 in the
PROFIBUS message frame according to the configured object sequence.
Reading process data from DP slave S120
The process data for the machine axes are read from the PROFIBUS message
frame by the DP master in the configured object sequence and transferred to
the corresponding I/O addresses.
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DP slave S120
DP slave S120 interprets the PROFIBUS message frames received from the
DP master based on the STARTER configuration:
PROFIBUS address: 10
Object Drive object No. Message frame type
1 Drive_1 3 SIEMENS message frame 102
2 Drive_2 4 SIEMENS message frame 102
3 Drive_3 5 SIEMENS message frame 102
4 Infeed 2 Free message frame configuration with BICO
5 Control Unit 1 Free message frame configuration with BICO
Transferring process data to the drive object
The process data (message frame type) are read from the PROFIBUS message
frame by DP slave S120 in the configured object sequence (object) and trans-
ferred to the corresponding drive object according to the drive object number.
Example:
The process data for the first object is read to the PROFIBUS message frame
according to message frame 102. The process data is transferred to the drive
object: ”Drive_1”, drive object No. 3.
Reading process data from the drive object
The process data (message frame type) are read from the corresponding drive
object by DP slave S120 in the configured object sequence (object) based on
the drive object number and transferred to the PROFIBUS message frame.
8 PROFIBUS DP Communication
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