Interlock Welding Schedule Inside The Cabinet; Contact-Disconnector Control; Water Stop Valve; Flow Protection - Bosch PRC 7 00-L /W 402 Serie Typspezifische Anleitung

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7.2.13 Interlock welding schedule inside the cabinet

Not to overload the supply, it must be ensured, that inside of a cabinet only one
timer is in welding schedule.
Before a welding schedule, the input "Interlock welding schedule" will be checked,
whether the other timer execute just now a welding schedule. In this case, it will
be waited until the input is no longer be set.
Subsequent the timer start the welding schedule and set the output "Interlock
welding schedule", so long as the timer execute the welding schedule.
To intercept the case, that both timers start a welding schedule simultaneously,
the input "Interlock welding schedule" will be checked alsoe during the welding
schedule. If the input is set, then will the welding schedule be cancelled with error
message.
Note: This interlock affect only the actual welding schedule, not the closing of the
gun. A simultaneously closing of guns at both timers is possible.
7.2.14

Contact-disconnector control

Before each welding schedule, the contact-disconnector, over which the primary
current is switched for the gun position, from which the schedule was started, is
closed.
The contact-disconnector for the other gun position will be opened
simultaneously.
The weld time may only begin, as soon as the contact-disconnectors have
switched safe.
The contact-disconnector will only be opened after start at the other gun position
or after expiry of a delay time of one hour.

7.2.15 Water stop valve

The set input „ Water stop valve on" is condition for this that the output "Water
stop valve on" can be set to enable the cooling water flow.
If the input is reset then the output is at low-level and cannot be set.
The output "Water stop valve on" will be at the beginning of each welding
schedule at the corresponding gun position switched on. After one hour the output
will be again switched off, if no new start has happened.

7.2.16 Flow protection

Within the whole welding schedule (not only during the weld time) the flow
protection will be evaluated.
If the input is not set, then the welding schedule will be cancelled with an error
message.
7.2.17 Status lamps of the HIP
• Welding fault
Will be set if the schedule would be finished with a welding process error.
Will be reset after reset of the fault.
R911381739 | PRC 7x00-Lx/Wx-402