Code ER97: IO Link FAILURE(CHn

Gyy) (Note1) (Note3) When this alarm is issued with a machine which has operated normally, possible causes are: (1) The communication cable from group yy-1 to group yy is broken or a connection failure occurs in the cable. (2) The power to an I/O device in group yy or following is off or is turned on too late. (3) A failure occurs in an I/O device in group yy or yy-1. (4) When the power to the CNC is turned off, then on again, the power to an I/O device is kept on. When turning the power to the CNC off, then on again, be sure to turn the power to all I/O devices off, then on. When this alarm is issued during debugging of a sequence program, there are the following possible causes in addition to the above: (5) The number of groups of connected I/O devices is invalid. (6) The I/O module allocation setting is invalid. (7) The parameter setting for the I/O Link assignment data selection function is invalid. (8) The machine signal interface is invalid. When this alarm is issued, details can be checked in the “I/O Device Monitor screen”. This alarm is generated if the number of I/O units is insufficient. This alarm is generated if the number of I/O units, set with the I/O module allocation and I/O link allocation selection functions differs from the number of I/O units actually connected to the CNC. All I/O devices connected to the channel for which this alarm was issued are not linked. The ladder program runs regardless of the occurrence of this alarm.