01.04 Function descriptions
SIEMENS AG 6SG7000-0BA76 9-23
SIMOTRAS HD Operating Instructions
Diagnostic parameters r789, r799 or r809 provide information about the chronological distribution of
errored and error-free telegrams, as well as the nature of any communication errors that have
occurred.
A watchdog can be set in P787, P797 or P807 which can initiate a shutdown on faults (F011, F012 or
F013) in the case of timeout. By connecting binectors B2031, B6031 or B9031 to the fault message
triggers (using P788=2031 / P798=6031 / P808=9031), it is possible to acknowledge these fault
messages even if the fault is active continuously, thereby ensuring that the drive can still be operated
manually after the USS interface has failed.
Important !
The serial interfaces for the USS protocol are parameterized with the same parameters used to
configure the peer-to-peer protocol, although the setting ranges are different in some cases (see Notes
for relevant parameters in Parameter List, Section 11).
USS protocol: Brief start-up guide for 6SG70 converters
G-SST1
RS232 / RS485
G-SST1
RS485
for connection of an OP1S
G-SST2 / G-SST3
RS485
Select USS protocol P780 = 2 P780 = 2 P790 / P800 = 2
Baud rate P783 = 1 to 13, corresponding to
300 to 187500 baud
P783 = 6 (9600 Bd) or
7 (19200 Bd)
The baud rate setting must be
identical for every node in bus
operation
P793 / P803 = 1 to 13,
corresponding to 300 to 187500
baud
No. of process data (PZD No.)
(applies to Receive and Send)
P781 = 0 to 16 P781 = 2 P791 / P801 = 0 to 16
PZD assignment for control word
and setpoints
(received process data)
All received process data are
taken to connectors and must be
wired up as required
If the control bits from the OP1S
are to be used:
Word 1 (connector K2001):
Meaning of control bit
from OP1S, see Sec. 7.2.2
Word 2 (connector K2002):
Not used
All received process data are
taken to connectors and must be
wired up as required
No. of PKW P782 =
0: No PKW data
3 / 4: 3 / 4 PKW data words
127: Variable data length for
slave
→ master
P782 = 127 variable data length P792 / P802 =
0: No PKW data
3 / 4: 3 / 4 PKW data words
127: Variable data length for
slave
→ master
PZD assignment for actual
values
(transmitted process data)
Selection of transmitted values
via P784
Word 1: P784.i01=32
(stat. word 1 K0032)
Word 2: P784.i02=0
Selection of transmitted values
via P794 / P804
Node address P786 = 0 to 30 P786 = 0 to 30
Every node must have its own,
unique address for bus operation
P796 / P806 = 0 to 30
Telegram failure time P787 = 0.000 to 65.000s P787 = 0.000s P797 / P807 = 0.000 to 65.000s
Bus terminator P785 = 0: bus terminator OFF
1: bus terminator ON
P785 = 0: bus terminator OFF
1: bus terminator ON
P795 / P805 =
0: bus terminator OFF
1: bus terminator ON
Bus / point-to-point
communication
RS232: Only point-to-point
operation possible
RS485: Bus operation possible
Bus operation possible Bus operation possible
2-wire / 4-wire transmission
via RS485 interface
2-wire operation is selected
automatically
2-wire operation is selected
automatically
2-wire operation is selected
automatically
Cable Connector assignments, see
Sect. 6.6
or Sheet 170 in Sect. 8
See operating instructions for
OP1S operator panel
Connector assignments, see
Sect. 6.6
or Sheets G171, G172 in Sect. 8
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