Siemens SINAMICS V90 Operating Instructions Manual page 213

FC16 - Write multiple registers
When a message with FC = 0x10 is received, then 5 + N bytes of data are expected, that is,
FC16 has 5 + N bytes of data:
● Two bytes for the starting address
● Two bytes for the number of registers
● One byte for the byte count
● N bytes for the register values
Byte 1 Byte 2 Byte 3
Address FC Start
(0x10) address
(most
signifi-
cant
byte)
Operating steps
Description
①
Configure the RS485 bus address by parameter
p29004.
②
Select the communication protocol by parameter
p29007.
③
Select the command and setpoint source by parame-
ter p29008.
④
Set the transmission baud rate by parameter p29009.
⑤
Set control mode for the drive by p29003.
⑥
Save the parameters and restart the drive.
⑦
Configure the PLC parameters.
SINAMICS V90, SIMOTICS S-1FL6
Operating Instructions, 09/2015, A5E36037884
Byte 4 Byte 5 Byte 6
Start Number Number
address of regis- of regis-
(least ters ters
signifi- (most (least
cant signifi- signifi-
byte) cant cant
byte) byte)
You can configure the slaver address from 1 to 31.
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Note:
Keep the PLC baud rate the same as the drive setting.
Set even parity check for the PLC.
7.7 Communicating with the PLC
Byte 7 Byte 7 +
n
Number nth
of bytes value
(most
signifi-
cant
byte)
Comment
p29007 = 0: No protocol
p29007 = 1: USS protocol
p29007 = 2: Modbus protocol
p29008 = 1: Setpoint and control word from Modbus PZD
p29008 = 2: No control word.
5: 4800 baud
6: 9600 baud
7: 19200 baud
8: 38400 baud
9: 57600 baud
10: 76800 baud
11: 93750 baud
12: 115200 baud
13: 187500 baud
Control functions
Byte 8 + Byte 9 + Byte 10 +
n n n
nth CRC CRC
value
(least
signifi-
cant
byte)
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