
3.SAFETY FUNCTIONS B-64004EN/02
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8. SPS1 to SPS32 (SPS33 to SPS64 in case of 2 or more path) Safety Position Switch
(output)
These signals show whether the machine position of each axis is
stayed within the range specified by the parameters or not.
9. Programmable Safety I/O signals (input/output)
The 8 bytes (64 bit) programmable safe I/Os can be freely defined as
the different address from the above basic safe signals. Each byte of 8
byte programmable safe I/Os can be assigned on either address of X/Y
or R or D by parameter. Each byte of the programmable safe I/O
between the PMC and DCS PMC is cross-checked by the CNC and
PMC. The combinations of cross-checking these signals are defined
by using Safety parameters as follows.
Signal type Combination No. DCS PMC PMC
1 No.11950 No.11970
2 No.11951 No.11971
3 No.11952 No.11972
4 No.11953 No.11973
5 No.11954 No.11974
6 No.11955 No.11975
7 No.11956 No.11976
input
8 No.11957 No.11977
1 No.11960 No.11980
2 No.11961 No.11981
3 No.11962 No.11982
4 No.11963 No.11983
5 No.11964 No.11984
6 No.11965 No.11985
7 No.11966 No.11986
output
8 No.11967 No.11987
Signals other than safe-related I/O
The following signals are not safe-related signals (are not checked in
redundant mode) but are important signals in the dual check safety
system. The machine tool builder must create an appropriate Ladder
program with these signals.
IMPORTANT
The error of ladder program cannot be checked by
safety function itself. Please make sure to check
safety function (see Chapter 7).
10. ORQ Guard Open Request signal (input)
When this signal is input, the CNC set the Guard Open Inhibit signal
(*OPIHB) to “1” (Guard open accept). The PMC ladder program of a
machine tool builder confirms the safety machine position and the
safety speed. If both machine position and speed are judged within
safe range according to the result of confirmation, the guard unlock
signal is set to 1 (guard unlock enabled). The machine tool builder