Siemens SIMOTRAS 6SG7050 Operating Instructions Manual page 321

01.04
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
Select USS protocol
Baud rate
No. of process data (PZD No.)
(applies to Receive and Send)
PZD assignment for control word
and setpoints
(received process data)
No. of PKW
PZD assignment for actual
values
(transmitted process data)
Node address
Telegram failure time
Bus terminator
Bus / point-to-point
communication
2-wire / 4-wire transmission
via RS485 interface
Cable
SIEMENS AG 6SG7000-0BA76
SIMOTRAS HD Operating Instructions
G-SST1
RS232 / RS485
P780 = 2
P783 = 1 to 13, corresponding to
300 to 187500 baud
P781 = 0 to 16
All received process data are
taken to connectors and must be
wired up as required
P782 =
0: No PKW data
3 / 4: 3 / 4 PKW data words
127: Variable data length for
slave → master
Selection of transmitted values
via P784
P786 = 0 to 30
P787 = 0.000 to 65.000s
P785 = 0: bus terminator OFF
1: bus terminator ON
RS232: Only point-to-point
operation possible
RS485: Bus operation possible
2-wire operation is selected
automatically
Connector assignments, see
Sect. 6.6
or Sheet 170 in Sect. 8
G-SST1
RS485
for connection of an OP1S
P780 = 2
P783 = 6 (9600 Bd) or
7 (19200 Bd)
The baud rate setting must be
identical for every node in bus
operation
P781 = 2
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
P782 = 127 variable data length
Word 1: P784.i01=32
(stat. word 1 K0032)
Word 2: P784.i02=0
P786 = 0 to 30
Every node must have its own,
unique address for bus operation
P787 = 0.000s
P785 = 0: bus terminator OFF
1: bus terminator ON
Bus operation possible
2-wire operation is selected
automatically
See operating instructions for
OP1S operator panel
Function descriptions
G-SST2 / G-SST3
RS485
P790 / P800 = 2
P793 / P803 = 1 to 13,
corresponding to 300 to 187500
baud
P791 / P801 = 0 to 16
All received process data are
taken to connectors and must be
wired up as required
P792 / P802 =
0: No PKW data
3 / 4: 3 / 4 PKW data words
127: Variable data length for
slave → master
Selection of transmitted values
via P794 / P804
P796 / P806 = 0 to 30
P797 / P807 = 0.000 to 65.000s
P795 / P805 =
0: bus terminator OFF
1: bus terminator ON
Bus operation possible
2-wire operation is selected
automatically
Connector assignments, see
Sect. 6.6
or Sheets G171, G172 in Sect. 8
9-23