3 608 870 A47 Tightening Technology | Bosch Rexroth AG 227/263
Nexo cordless Wi-Fi nutrunner | 3 608 870 A47/2017-05
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 tight-
ening 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 Cnt-
NOK) 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 9–76: 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 se-
quence.
Counter set The Counter value option allows setting a total of 255 OK/NOK counters. A
maximum value for OK tightening jobs and a maximum value for NOK tight-
ening jobs are defined for each counter.
–Click Add or Remove to add or delete a counter value, respectively.
– OK/NOK
Set the counting direction, i.e. whether counting is to be ascending or de-
scending.
– 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 dis-
abled.
This setting also has an effect on changing to a different counter (chang-
ing 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 CntCanceledwill always
be output when a different counter is selected.
– Disable program no. 99 after
This option allows defining whether program no. 99 ("Loosen") is to be
disabled after an OK tightening job or after an NOK tightening job. Within
one counter set, 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.
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