
5.I/O SIGNALS B-64004EN/02
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Guard Open Inhibit signal (output)
*OPIHB <PMC: Fn191#0><DCS PMC: F(019+m)#0> (for each machine group)
CNC returns these signals as answer when CNC detects that Guard
Open Request signal (ORQ) is set to “1”.
[Classification] Output signal (Not checked doubly)
[Function] When CNC receives Guard Open Request signal (ORQ) =1, CNC
returns these signal as answer. CNC outputs Guard Open Inhibit
signal (*OPIHB) through both PMC and DCS PMC.
0: Inhibit guard open
1: Permit guard open
[Operation] A machine tool builder can release a guard lock by his ladder program
when Guard Open Inhibit signal (*OPIHB) =1, Monitoring Result
signal (RSVx/RSPs) =1 and the condition of machine side is
confirmed to be safe.
IMPORTANT
The mistake of the ladder program cannot be
checked. So be sure to perform the confirmation of
the safety function. (refer to the chapter 7)
Monitoring Result signal (output)
RSVx <PMC:Fn750#0 to #7><DCS PMC:F(002+m)#0 to #7> (for each axis)
RSPx <PMC:Fn751#0 to #3><DCS PMC:F(003+m)#0 to #3> (for each spindle)
These signals show the result of monitoring safety speed, safety
machine position and safety position error.
By checking these signals, a machine tool builder can judge whether a
machine is in safe state or not. When a machine is judged to be in safe
state, it is necessary to turn on the signal for releasing a guard lock
and outputs a signal actually to open a protective door.
[Classification] Output signal (Output to both PMC but not checked doubly)
[Function] These signals show the result of monitoring of the Dual Check Safety
Function.
These signals notify that an abnormal condition is detected in safety
monitoring function of the Dual Check Safety Function, such as safety
speed check, safety machine position check and safety position error
check.
In the following case, these signals are turned to “0”.
0: In dangerous condition (Abnormal condition is detected by
safety function.)
In the following case, these signals are turned to “1”.
1: In safe condition (Abnormal condition is not detected.)
[Operation] Each CPU notifies PMC of the result of safety monitoring through
these signal.
A machine tool builder can release a guard lock by his ladder program
when Guard Open Inhibit signal (*OPIHB) =1, these Monitoring
Result signal (RSVx/RSPx) =1 and the condition of machine side is
confirmed to be safe.