Communication / USS 02.2004
6SE7087-6QX70 (Version AD) Siemens AG
8.1-34 Compendium Motion Control SIMOVERT MASTERDRIVES
USS protocol at the SCB2 board
♦ Settings:
USS protocol with 19.2 kbit/s and 4-word PKW area and 2-word
PZD area
• 4-word PKW area:
With this setting, all parameters whose values are 16-bit (= 1
word) or 32-bit (double word) quantities can be read or written via
the USS protocol.
• 2-word PZD area:
Transfers control word 1 and a setpoint (each of them 16 bit)
from the master to the converter and control word 1 and an
actual value (each of them 16 bit) from the converter to the
master.
♦ Preconditions:
P060 = 1 or 7
♦ Parameterization of the interface on the SCB2 board:
Parameter
number
Parameter Value Comments
P682 SCB protocol 2
Physical bus cable, 2-wire USS
protocol (according to /1/, only USS
operation with 2 wires is defined).
Parameter
number
Parameter Index and value
(index i003 for SCB2)
Comments
P700 SCom/SCB BusAddr i003 = 21 Bus address SCom2 = 21
P701 SCom/SCB Baud rate i003 = 7 19.2 kbit/s
P702 SCom/SCB PKW # i003 = 4 4-word PKW
P703 SCom/SCB PcD # i003 = 2 2-word PZD
P704 SCom/SCB TlgOFF i003 = 0 to 6500
0: No monitoring
>0: Monitoring time in ms
Example 3
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