166
Bosch Rexroth AG
| Tightening Technology
3 608 870 A47
Nexo cordless Wi-Fi nutrunner
| 3 608 870 A47/2019-10
7.7.2
Particularities with VW-XML results output
The VW corporate requirement specifications "Controlled tightening systems" defines five tightening
processes. This section describes the necessary parameterizations of the relevant tightening programs
as well as their control functions in the NEXO-OS in order to satisfy the requirements of VW-XML.
Comparison of designations of the tightening category
The following configuration data of the nutrunner (under
Settings
Configuration
)
are
implemented in the VW-XML results protocol:
7.7.3
Tightening process
The Nexo cordless Wi-Fi nutrunner does not offer pre-configured tightening program steps for the
tightening processes defined in the VW corporate requirement specifications (see chapter 2.3.2.3 in the
VW corporate requirement specifications). In order to detect the AD process or AW process in the output
VW-XML, the relevant tightening programs must satisfy certain requirements and have special
characteristics.
Tightening process torque (AD process)
Table
shows how the AD tightening process has to be parameterized in the Nexo cordless Wi-Fi
nutrunner.
Table 7–61:
Assignment of the tightening step categories for VW-XML in the Nexo firmware
VW corporate requirement
specifications
Nexo category of the tightening step
Start-up step AS
0: None
1: Tightening
11: Start
Pre-tightening step VS
2: Preliminary torque
Final tightening step ES
3: Final torque
Loosening step LS
4: Loosen
Finding step FS
6: Function A
Waiting step WS
7: Function B
Final tightening step ES
5: Rework
8: Function C
9: Function D
10: Function E
Parameter
Implementation VW-XML
Code
<PRC_SST><PAR><FAS><GRP><TYP>
Serial number
<PRC_SST><PAR><FAS><GRP><SNR>
Channel name
<PRC_SST><PAR><FAS><GRP><SBZ>
Table 7–62:
Parameterization of the AD process
Function in NEXO-OS
Parameter in NEXO-OS
Parameter in VW
corporate requirement
specifications
Comments
1. Target function
Torque
Torque set value [T
A
]
2. Target function
Angle
Angle upper limit
(switching) [A
O
]
Speed
Speed set value [n]
Torque threshold
Torque threshold value [T
T
]
Torque min. value
monitoring
T–
Lower tolerance torque [T–]
Torque max. value
monitoring
T+
Upper tolerance torque [T+]
Angle min. value monitoring A–
Lower tolerance angle [A–]
