Function descriptions 02.00
9-26 SIEMENS AG 6RX1700-0AD76
SIMOREG DC Master Operating Instructions
Diagnostics and monitoring functions for peer-to-peer link
All transmitted and received useful data words can be checked (directly at the internal software
transfer point from/to peer driver) by means of display parameters r812 / r813 or r814 / r815.
Diagnostic parameters 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 P797 or P807 which can initiate a shutdown on faults (F012 or F013) in the
case of timeout. By connecting binectors B6031 or B9031 to the fault message triggers (using
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 peer-to-peer
interface has failed.
Important !
The serial interfaces for the peer-to-peer protocol are parameterized with the same parameters used to
configure the USS protocol, although the setting ranges are different in some cases (see Notes for
relevant parameters in Parameter List, Section 11).
Peer-to-peer communication, 4-wire operation
Serial linking of converter to converter (partners of equal status).
The signal flow can pass through the drives, for example, in a series connection. In this case, each
drive forwards the data after processing only to the next drive (classic setpoint cascade).
Brief start-up guide for 6RA70 converters
G-SST2
RS485
G-SST3
RS485
Select peer-to-peer protocol P790 = 5 P800 = 5
Baud rate P793 = 1 to 13 corresponding to 300 to 187500
baud
P803 = 1 to 13 corresponding to 300 to 187500
baud
No. of process data (PZD No.)
(applies to Receive and Send)
P791 = 1 to 5 P801 = 1 to 5
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
All received process data are taken to connectors
and must be wired up as required
No. of PKW No parameters can be transferred No parameters can be transferred
PZD assignment for actual
values
(transmitted process data)
Selection of transmitted values via P794
(indices .01 to .05)
Selection of transmitted values via P804
(indices .01 to .05)
Telegram failure time P797 = 0.000 to 65.000s P807 = 0.000 to 65.000s
Bus termination P795 = 0: Bus term. OFF
1: Bus term. ON
(depending on type of link)
P805 = 0: Bus term. OFF
1: Bus term. ON
(depending on type of link)
2-wire / 4-wire transmission
via RS485 interface
"4-wire" operation is automatically selected "4-wire" operation is automatically selected
Cable Terminal assignments, see Section 6.8 or Sheet
G173 in Section 8
Terminal assignments, see Section 6.8 or Sheet
G174 in Section 8
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