Siemens SIMOREG DC Master 6RA7028-6DS22 - Page 319

02.00 Function descriptions
SIEMENS AG 6RX1700-0AD76 9-27
SIMOREG DC Master Operating Instructions
Examples of peer-to-peer links
Rx Tx
2)
+
56575859
--
++
6RA70
Rx Tx
+
56575859
--
++
6RA70
Rx Tx
+
56575859
--
++
6RA70
Rx Tx
+
56575859
--
++
6RA70
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.
Drive 1
(Activate bus terminating
resistors when a data feed-
back loop is used)
Drive 2
(Bus terminating
resistors activated)
Drive 3
(Bus terminating
resistors activated)
Drive n
n=any number
(Bus terminating
resistors activated)
Data feedback loop 3)
2)1)
Rx Tx
+
56575859
--
++
6RA70
Rx Tx
+
56
57
58
59
-
-
+
+
6RA70
Rx Tx
+
56
575859
-
-
++
6RA70
Rx Tx
+
56
57
58
59
-
-
++
6RA70
Peer link type "Parallel connection"
Up to 31 drives receive identical setpoints from drive 1
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 7V.
Drive 1 Drive 2
(
Bus terminating
resistors deactivated
)
Drive 3
(
Bus terminating
resistors deactivated
)
Drive n
(n <= 32)
(
Bus terminating
resistors activated
)