3 608 870 A47
Tightening Technology |
Bosch Rexroth AG 237
Nexo cordless Wi-Fi nutrunner
| 3 608 870 A47/2019-10
9.8.8
OK/NOK counter
Settings
OK/NOK counter
Use this menu item to define the settings for the OK/NOK counters. The counters for OK and NOK
tightening are used to assess a sequence of tightening jobs. Each tightening job is counted according to
its evaluation. If a counter reaches its specified maximum value, a control signal is output (CntOK or
CntNOK) and, if desired, the tightening channel is blocked.
As of Nexo firmware version 1300, the operating mode (manual mode or automatic mode) of the Nexo
cordless Wi-Fi nutrunner can be selected. For both operating modes, separate OK/NOK counters can
be configured. The processing via OpenProtocol (MID 0019, MID 0020 and MID 0021) is only possible
for the OK/NOK counter of the
Automatic
operating mode.
Table 9–84:
OK/NOK counter tab
Element
Description
Operating mode
Selection of the operating state.
Select PLC signals
Use
Select PLC signals
to select the counters:
– Prg0 ... Prg7
The counters are selected using the control signals used to select the
tightening program. Thus, a counter with the same number is assigned to
each tightening program, i.e. the sequence consists of tightening jobs
with the same tightening program.
– CntSel0 ... CntSel7
The counters are selected using these control signals. This selection is
implemented independently of the tightening program e.g. by the partner
controller. Thus, different tightening programs can be used within the
sequence.
Counter set
The
Counter value
option allows setting a total of 255 OK/NOK counters. A
maximum value for OK tightenings and a maximum value for NOK tightenings
is defined for each counter.
– Click
Add
or
Remove
button to add or delete a counter value,
respectively.
–
OK
/
NOK
Set the counting direction, i.e. whether counting is to be ascending or
descending.
– Disable when OK/NOK number is reached
The appropriate control signal is output (CntOK or CntNOK) when the
maximum number of the current counter is reached. Here, you can define
whether the nutrunner is to be disabled once the maximum number is
reached or whether the loosening program no. 99 is to be enabled or
disabled.
This setting also has an effect on changing to a different counter
(changing the control signals
Prog0 … Prog7
or
CntSel0 … CntSel7
). If
a counter is active (the counter is configured and has counted at least one
tightening job), but none of the maximum values for OK or NOK tightening
jobs have been reached, the PLC output signal
CntCanceled
will always
be output when a different counter is selected.
– Conditional blocking of the loosen program
Setting whether the loosen program no. 99 can be used after an OK
tightening (
after OK result
), after a NOK tightening (
after NOK result
)
and/or should be locked before starting the tightening (from version 1400
of the Nexo firmware:
before starting the execution
). Within one counter
value, program no. 99 (Loosen) can be disabled for one or more OK or
NOK tightening jobs.
If the configured number of OK tightening jobs (
Max OK
) and NOK tightening jobs (
Max NOK
) has been
reached within a counter value, the settings under
Disable program no. 99 after
are no longer effective.
In this case, the setting under
Disable when OK/NOK number is reached
become effective.
