Yaskawa YASNAC PC NC Maintenance Manual - Manual (Page 63)

PC NC Maintenance Manual Chapter 4: Troubleshooting
4-42
F5:CPU is defective.
Error Contents Internal RAM check error (at initialization).
Cause and measures
.. : Control card fault
Error Contents WDT time-out
Cause and measures
VS-626M5 Alarm List (digital operator)
In VS-626M5, the security function operates according to the error content
when a fault and an error phenomenon are generated during a drive opera-
tion, while the drive is stopped. This error content is displayed by an error
number (AL code) in a digital operator. Moreover, in M5A type is dis-
played to the seven segment LED by the number of two digits.
The fault code is the signal output in the 6CN-26 ~ 29 pins of the M5A
type; 1 is indicated ON (close) and 0 is OFF (opening). (The figure of four
digits shows the state of 29, 28, 27, and 26 pins from the left)
The rank of A, B, and S meanings are as follows.
A: Major fault. The current is intercepted and the drive is stopped simulta-
neously with the detection of an error. The motor coasts to a stop. An
error reset is accepted.
B: Minor fault. The drive continues.
S: Major fault. The current is intercepted and the drive is stopped simulta-
neously with the detection of an error. The motor coasts to a stop. An
error reset is not accepted. Turn OFF the control power supply to
release an error display.
Cause Measures
CPU fault Exchange unit (exchange control card)
Cause Measures
Control card fault Exchange unit exchange (exchange control card)