Siemens 6RA7086-6KS22 Operating Instructions Manual page 385

05.05
Brief start-up guide for 6RA70 converters
Select peer-to-peer 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)
Telegram failure time
Bus termination
2-wire / 4-wire transmission
via RS485 interface
Cable
Examples of peer-to-peer links
Drive 1
(Activate bus terminating
resistors when a data feed-
back loop is used)
6RA70
Rx
+
-
+
59 58
Peer link type "Series connection"
Each drive receives its own individual setpoint from the drive connected upstream (classic setpoint cascade)
1)
The interface cable shields must be connected directly on the converter with the lowest possible
impedance to converter or cubicle earth (e.g. via a clamp).
2)
Twisted cable, e.g. LIYCY 2x0.5 sqmm; with longer cables, an equipotential bonding conductor
must be used to ensure that the difference in frame potentials between nodes stays below 7 V.
3)
Optional data feedback loop via which drive 1 can monitor operation of the entire peer chain.
SIEMENS AG 6RX1700-0AD76
SIMOREG DC Master Operating Instructions
P790 = 5
P793 = 1 to 13 corresponding to 300 to 187500
baud
P791 = 1 to 5
All received process data are taken to connectors
and must be wired up as required
No parameters can be transferred
Selection of transmitted values via P794
(indices .01 to .05)
P797 = 0.000 to 65.000s
P795 = 0: Bus term. OFF
1: Bus term. ON
(depending on type of link)
"4-wire" operation is automatically selected
Terminal assignments, see Section 6.8 or Sheet
G173 in Section 8
Drive 2
(Bus terminating
resistors activated)
6RA70
Tx Rx
+
- -
+ +
57 56 59 58
2)
Data feedback loop 3)
G-SST2
RS485
Drive 3
(Bus terminating
resistors activated)
6RA70
Tx Rx
- -
+
57 56 59
G-SST3
RS485
P800 = 5
P803 = 1 to 13 corresponding to 300 to 187500
baud
P801 = 1 to 5
All received process data are taken to connectors
and must be wired up as required
No parameters can be transferred
Selection of transmitted values via P804
(indices .01 to .05)
P807 = 0.000 to 65.000s
P805 = 0: Bus term. OFF
1: Bus term. ON
(depending on type of link)
"4-wire" operation is automatically selected
Terminal assignments, see Section 6.8 or Sheet
G174 in Section 8
Tx
+
-
+ +
58 57 56
Function descriptions
Drive n
n=any number
(Bus terminating
resistors activated)
6RA70
Rx Tx
+
- -
+ +
59 58 57 56
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