
B–61863E/15
L. MIGRATION OF LADDER PROGRAMS
BETWEEN DIFFERENT MODELS
APPENDIX
1537
(9)Addition of PMC alarm (PMC–SB7)
The number of groups of I/O Link defined in the sequence program is
compared with the number of groups of actually connected I/O
devices. If the selectable I/O link assignment function is used, the
number of selected I/O groups is compared to the number of groups
of actually connected I/O devices. When the number of groups does
not match, the following PMC alarm occurs.
Alarm message Contents Solution
ER97 IO LINK FAILURE
(CHx yyGROUP)
The allocation of the I/O module in group
yy does not match the actual I/O device
configuration.
1) Check the connection of the cable lead-
ing to the I/O device in group yy.
2) Check that the I/O device was turned on
before the CNC
3) Check the setting data of the I/O link as-
signment function.
4) Check the setting parameter of the se-
lectable I/O link assignment function.
NOTE
All I/O devices connected with the channel on which this
alarm occurs are not linked.
And the sequence program runs regardless of this alarm.
This function is controlled by K906.2.
K906.2 = 0: Connection check of I/O link is effective. (Initial
value)
K906.2 = 1: Connection check of I/O link is not effective. (Same
as 16i/18i/21i–A)
CAUTION
When the I/O devices are linked on the several abnormal
status, for example, a failure of the I/O devices, a failure of
the I/O device’s connection and a change of the setting of
the I/O devices by unintentional operation, there is
possibility that the machine may not work normally. If this
function is effective, it is possible to inspect the abnormality
of the I/O devices in power on. It is recommended that this
setting is set to initial value (0) to troubleshoot the I/O
devices easily.
(10)PMC C Language program
As for the conversion of C language applications from Series
16i/18i/21i–A to Series 16i/18i/21i–B, see the description below.
The C language library”A08B–9201–J701” is applied in version 14
or later. As for the details, refer to ”B–61863–1/06–1”.