Bosch Rexroth PST 6 0 Series, Operating Instructions Manual

Page: 185 / 330

1070080029 / 05 Bosch Rexroth AG Electric Drives
and Controls
PST 6xx0 | | 185 /330
Safety instructions
WARNING
Inappropriate or missing evaluation of error messages
Possibility of reduction of personal/plant safety, function disturban­
ces!
"
Many messages can be configured freely in the WT depending on
your requirements, either as ”warning” (no inhibition) or ”error”
(with inhibition).
However, messages with error characteristic always have to be
configured as ”error” and thus lead to inhibition of the connected
timer!
" Use the available message signals to design the process of your
application as safely as possible.
The timer provides a large variety of message signals to feed in
error signals from the process and output errors to the process
(PLC, robot) (e.g. via discrete and/or serial inputs/outputs).
" Wit respect to fault analysis, please also refer to the information in
Section „Troubleshooting“.
Defective or incomplete connection of I/O signals
Possibility of reduction of safety of persons/systems, function
disturbances/restrictions!
" Any user, line supplier, welding machine manufacturer and wel­
ding gun provider is obligated to connect all output signals that
cause movements (such as solenoid and prelift) in compliance
with the applicable safety regulations (e.g. ISO 13849) and to en­
sure that risks to personnel are safely avoided!
" Please note that electronic outputs are considered "unsafe" in ac­
cordance with the safety regulations. For this reason, e.g. the gun
control must be additionally protected by relays.
"
Also note the information concerning the effects of the I/O signals
available and concerning the status and error messages.
" Make sure upon commissioning at the latest that all I/O signals
have been properly wired and are correctly transmitted.
"
Use e.g. ”two-handed start”, guards, light barriers, etc. to
minimize the risk of injury at the system.
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