Retransmitting Inputs To Outputs; Schedule; Dressing Tool; Sheet Thickness Management - Bosch Rexroth PSI 6xCx.727 Typspezifische Anleitung

R911336188 | PSI 6xCx.727
New spot selection:
Program start:
If one of the limits is exceeded, a warning is output. This warning will remain
active until the next tip dressing / tip change cycle or until the actual %I values are
reset at the user interface.
7.1.4

Retransmitting inputs to outputs

The following inputs are retransmitted to outputs:
• discrete inputs E_01..08  serial outputs 3.8..15
• serial inputs 3.8..3.12  discrete outputs A_01..05
7.1.5

Schedule

Program start is subdivided into two parts: New spot selection and Program start.
Both parts use a handshake.
The robot initially selects a new spot number at the corresponding timer inputs.
Afterwards, it sets the "Valid spot selection" input.
The spot selection has 24 Bits.
This input requests the timer to read out the new spot number, to prepare the
corresponding welding program and to set the program-dependent and electrode
dependent timer outputs accordingly. If the timer found the spot in the internal
spot table the timer will set the output "Spot selection data valid".
If no valid spot number has been specified, the base pressure of program 0 will
be output.
Spot numbers lower than 256 will be interpreted as program numbers by the
timer.
Once the robot has detected the "Spot selection data valid" output, it can evaluate
the corresponding outputs of the weld timer. Furthermore, it must reset the "Valid
spot selection" input. As a response, the timer will reset the output "Spot selection
taken over".
The actual program start is initiated by the input "Start" of the robot. At the end of
the schedule, the timer will either set the "Weld complete" output, if the schedule
was o.k., or the "Welding fault" output will be set if the schedule was not o.k., or
the "Timer ready" output will be reset if a general fault was present.
When the robot resets the "Start" input, the timer will reset the "Weld complete"
output. The fault has to be corrected and reset in the event of an incorrect
schedule.
If the spot number selected during start differs from the one specified together
with the program selection function, the welding sequence will not be started.
7.1.6

Dressing tool

The timer has additional counters that count each tip dress performed on each
electrode. If a counter exceeds a programmed prewarning value, the „ Tip Dress
Cutter Warning" output will be set. When the programmed maximum value is
reached, the „ Tip Dress Cutter at End of Life" output will be set. The function is
switched off if the value „0" is specified as maximum value.
If the counter for dressing tool has reached maximum value, the timer cannot
schedule a weld cycle.
7.1.7

Sheet thickness management

For each weld program parameters for the "sheet thickness" and "sheet thickness
tolerance" can be stored in the timer.
The outputs "sheet thickness x" and "sheet thickness tolerance" are set at every
program selection.
Bosch Rexroth AG 41/47
Features