2-6 Electric Drives
and Controls
Bosch Rexroth AG PSI 6500.xxx 1070087059 / 02
Fundamentals on the Master-Slave Mode
. For fundamental explanations on the PHA and CCR regulation mo-
des, please refer to the “Control and I/O Level, Technical Informa-
tion” documentation of the particular unit types (PSx 6xxx.100, PSx
6xxx.190 and PSx 6xxx.000).
2.3 Diagnosis
Using the master-slave connection (X6, X7), a slave informs its master
only globally about an error state, not about the precise error cause. In
this case, the master disables its “ready” state (as the slave beforehand).
In order to eliminate slave errors that cannot be reset by a simple “error
reset” at the master (see note below), the precise error cause must be
known and, if necessary, the error must be manually acknowledged di-
rectly at the slave (in case of non-self-acknowledging errors; see note
below).
For that reason,
D you can connect (X1) a laptop with installed user interface (“BOS” or
“LT IB” with the type PSI 6500.000), for instance, to the slave, read the
slave error via the user interface, eliminate and, if necessary, ack-
nowledge the error,
or
D you can connect all slaves to a higher-order welding processor (PC
with BOS user interface) via a programming bus interface, in addition
to the master. This centrally provides the possibility of displaying and
resetting the error for all units that are connected.
. ”An “error reset” at the master can be achieved
- via the user interface or
- via the Reset button on the front panel.
. “Self-acknowledging” means that errors are automatically cleared
by the control after the error cause has been eliminated. In this
case, a manual “error reset” is not required.
Examples: - E/Stop circuit open /no 24V =
- Power voltage off / too low
At the moment, the following messages or errors are defined for a slave:
Ok Hardware fault
Driver fault Battery low
Cooling temperature too high Restore active
Power voltage off / too low Memory deleted
No 24V= supply Slave fault
Overcurrent or earth fault
E/Stop open / no 24V=
24V off / too low
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