Siemens SINAMICS G120P - Telegram Examples, Length of the Parameter Channel = 4

Communication via RS485
5.3 Communication via USS
Fieldbuses
120 Function Manual, 04/2018, FW V4.7 SP10, A5E34229197B AE
5.3.4.1
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 ≙ 90 hex)
●
IND, bit 0 … 7 (subindex): = 2
(Index of the 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.
Figure 5-4 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)
●
PWE1, bit 0 … 15: = 0 hex
●
PWE2, bit 0 … 15: = 1A hex
(26 = 1A hex)
Figure 5-5 Telegram, to activate the automatic restart with p1210 = 26