Bosch Rexroth Tightening System 350 - Page 627

3 608 878 300 Tightening Technology | Bosch Rexroth AG 627/641
System 350 | 3 608 878 300/2019-03
7.8.2.1 Commissioning
Tightening channel
configuration
The flat output drive without safety catch is configured in the open flat output drive channel configuration.
See Channel configuration of open flat output drives (page 555).
For configuration, activate the option Open flat key program-controlled. After sending, the system is
restarted.
Calculation and specification of the Precise motor screw reduction ratio:
For positioning accuracy, the total motor screw reduction ratio (I
G
) should be entered with 12 decimal
places.
PLC signals Referencing and open position of flat output drives without safety catch is realized via the PLC output
signals GO_Rdy and GO_Open. See Output signals (page 140).
As of version V2.500 of the Rexroth Tightening System 350, the PLC input signal GO_SetRef is available
for the reference point of the open position. Refer to Input signals (page 126).
Tightening programs For opening and referencing the flat output drive, new target functions were added to the extended
tightening step in the tightening program. Refer to the "Project planning" documentation of the Rexroth
Tightening System 350:
• Target function GO Ref
The open position of the flat output drive of the nutrunner is calibrated in the teach-in process.
• Target function GO Open
The nutrunner is rotating in tightening direction until the open position of the flat output drive is
reached. This requires referencing of the flat output drive.
7.8.2.2 Open position referencing
After switching on the system, referencing of the flat output drive in open position is required. Without
referencing, the "open" function GO Open of the flat output drive is canceled with error 1245.
Referencing is required:
• On controller reset / switching on
• After removal and connection of hand-held nutrunners
• If the open position cannot be set precisely on opening
The partner controller sets the reference run program via the program selection (see sectionOutput
signals).
Application of the new tightening functions GO_Ref and GO_Open without activation of the Program-
controlled flat key opening option leads to error 1213 "Sequence control error".