
B-64004EN/02 6.PARAMETERS
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NOTE
When Dual Check Safety function is used, this
parameter must be set to “1”. If Dual Check Safety
function is ordered and this parameter is “0”, an alarm
(DS0022) is displayed at power-on. This alarm can be
reset by pushing “CAN” and “RESET” key on MDI at
the same time.
#7 #6 #5 #4 #3 #2 #1 #0
1904 DCN
[Input type] Parameter input
[Data type] Bit axis
NOTE
When this parameter is set, the power must be
turned off before operation is continued.
# 6 DCN The checks of the target axis by Dual Check Safety function are:
0: carried out.
1: not carried out.
NOTE
1 It is not possible to inhibit each check of Dual
Check Safety Function of all axes by the parameter
DCN.
2 Set the DCN bit to 1 for the slave axis under
tandem control or for the tool axis of a simple
electronic gear box or electronic gear box 2-pair.
3 The checks by the dual check safety function are
not carried out on an axis for which the DCN bit is
set to 1. Set the DCN bit to 0 for normal axes.
1945 Safety input signal check timer
NOTE
When this parameter is set, the power must be
turned off before operation is continued.
[Input type] Parameter input
[Data type] Word machine group
[Unit of data] msec
[Valid data range] 0 to 1000
Input/output signals related to Dual Check Safety function (safety
double input/output signals) are transmitted through two paths, “I/O
Link #1 or #2” and “I/O Link#3, #4 or Profibus-DP”. CNC CPU and
PMC CPU exchange the input/output signals with each other at all
time to check each other. If a mismatch between double input/output
signals through two paths lasts greater than the time set in this