Siemens SINAMICS G120X - Telegram for a Read Request from P7841[2]

Parameter contents
Parameter contents can be parameter values or connector parameters. You require two words
for connector parameters. You can find more information on interconnecting connector
parameters in the operating instructions of the Control Unit in the section "Interconnecting
signals in the converter".
Enter the parameter value in the parameter channel right-justified as follows:
● 8-bit values: Low word, bits
0 … 7,
bits 8 … 15 are zero.
● 16-bit values: Low word, bits 0 … 15,
● 32-bit values: Low word and high word
Enter a connector parameter right-justified as follows:
● Number of the connector parameter: High word
● Drive object of the connector parameter: Low word, bits 10 … 15
● The index or bit field number of the connector parameter: Low word, bits 0 … 9
Telegram examples, length of the parameter channel = 4
Read request: Read out serial number of the Power Module (p7841[2])
To obtain the value of the indexed parameter p7841, you must fill the telegram of the parameter
channel with the following data:
● PKE, bit 12 … 15 (AK): = 6 (request parameter value (field))
● PKE, bit 0 … 10 (PNU): = 1841 (parameter number without offset)
Parameter number = PNU + offset (page index)
(7841 = 1841 + 6000)
● IND, bit 8 … 15 (page index): = 90 hex (offset 6000 corresponds to 90 hex)
● IND, bit 0 … 7 (subindex): = 2 (index of parameter)
● Because you want to read the parameter value, words 3 and 4 in the parameter channel for
requesting the parameter value are irrelevant. They should be assigned a value of 0, for
example.
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Figure 6-24 Telegram for a read request from p7841[2]
Write request: Changing the automatic restart mode (p1210)
Parameter p1210 defines the automatic restart mode:
● PKE, bit 12 … 15 (AK): = 7 (change parameter value (field, word))
● PKE, bit 0 … 10 (PNU): = 4BA hex (1210 = 4BA hex, no offset, as 1210 < 1999)
● IND, bit 8 … 15 (page index): = 0 hex (offset 0 corresponds to 0 hex)
● IND, bit 0 … 7 (subindex): = 0 hex (parameter is not indexed)
Advanced commissioning
6.3 Drive control
SINAMICS G120X converter
Operating Instructions, 06/2019, FW V1.01, A5E44751209B AC 273