Function - Bosch Rexroth PSI 6 Serie Betriebsanleitung

1070080028 / 08 | PSI 6xxx
13.3.1

Function

The entire master‐slave combination is exclusively controlled via the
master.
As is the case with an application without "master‐slave mode", it is only
the master that communicates with the higher-order PLC or the robot
via its I/O assembly (e.g. I/O DISK1) and that is coupled to a higher-or­
der control/programming unit via a programming bus interface (e.g.
PROFIBUS), if necessary.
The slaves are connected sequentially to the master via 9-pin connec­
tion lines (X6).
These are used by the master to activate the power sections of the sla­
ves synchronously with its own power section and to reset error states,
if occurring in the individual slaves, after they have been eliminated.
The slaves use the connection lines, for instance, to signal "ready" and
the particular actual value of the primary current to the master.
Each individual unit activates a single welding transformer or (via the
primary-side parallel circuit) several welding transformers (with identi­
cal electric data!).
The secondary-side parallel circuit of all transformers provides the pos­
sibility of increasing the welding capacity accordingly.
" Only welding transformers with identical electric data may be con­
nected in parallel.
Only use connection lines of the same length for all parallel transfor­
"
mers in the primary circuit.
Only use connection lines of the same length for all parallel transfor­
"
mers in the secondary circuit. If possible, connect the individual cur­
rent branches in parallel shortly before the electrodes.
Bosch Rexroth AG 421 / 460
Extension and conversion