Okuma Alarm-D 4217 Communication procedure NAK/WACK
NAK or WACK is received more than designated times during communication procedures.
Code
1->NAK is received for consecutive RC6 + 1 times in phase 2.
(transmitting station)
2->WACK is received for consecutive RC2 + 1 times in phase 2.
(transmitting station)
3->NAK is received for consecutive RC6+ 1 times in phase 3.
(transmitting station)
4->WACK is received for consecutive RC2 + 1 times in phase 3.
(transmitting station)
Probable Faulty Locations
The reception busy status is not cleared at the host computer side, or the text from the CNC cannot be received correctly.
Measures to Take
Check the cause that the host computer is in the busy state or the test cannot be received correctly.
Then, reset the communication by setting “1” at parameter.
(optional parameter bit No.29 bit3)
Related Specifications
DNC-C