Bosch Rexroth PRC 7 00-L Serie Bedienungsanleitung Seite 45

R911415883 | PRC 7x00-Lx/Wx-0130
Schedule start:
If the timer found the spot in the internal spot table or if a schedule was directly
selected, the timer will set the output "spot selection valid". When a valid spot
selection is active at the I/O array, the „Spot selection valid" output will become
high, otherwise it will be low.
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 "New
spot selection" input.
As a response, the timer will reset the outputs "Spot selection data valid" and
"spot selection valid".
The actual schedule start is initiated by the input "StartWelding" (Input 0) of the
robot. At the end of the schedule, the timer will either set the "EndOfSequence"
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 "StartWelding" input, the timer will reset the
"EndOfSequence" 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 spot selection function, the welding sequence will not be started.
7.1.6 Primary current regulation activated as default setting
The primary current regulation is activated as default setting.
7.1.7 Electrode status query
On the Outputs belonging to the Electrode status (PRC output No. 1 - 4) the
status over all electrodes is displayed. After setting the Input „StateQueryTip" the
inputs of the spot selection (PRC input No. 24 - 47) are interpreted as electrode
number. The status of the single electrode is displayed on the status outputs.
Changing of the electrode number must be confirmed with a rising edge on the
input "New spot selection". Here-on the status outputs follow the electrode
number.
The inputs "Tips have been dressed" and "electrodes have been chnaged" also
interpret the inputs of the spot selection (PRC input No. 24 - 47) as electrode
number.
7.1.8 Current electrode number
If a valid sequence selected by the spot selection, the control determines
thereafter, which belongs to the electrode number and outputs it to (PRC output
Nr. 16..23).
7.1.9 Component number
This number is added to the data of the welding protocol in order to allow for a
subsequent allocation of the information to a specific component on a specific car
body. The inputs will be interpreted as 8-bit ASCII characters. The ASCII_0
character corresponds to the first character of the name. The inputs are loaded
during the sequence (= start detected).
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