Toshiba GR200 Series - (iii)-2 OR interlock operator

6F2S1914 (0.49)
GRL200 (Soft 033 & 037)
- 830 -
used for ‘Quality’ can be found immediately below Table 4.7-3.
stVal
Quality
stVal
Quality
AND (• )
Output
Input(A)
Input(B)
stVal
Quality
Figure 4.7-5 Logic of interlock operator (AND) and Input/Output signals
OR interlock operator
When quality information (Quality) is applied to the interlock operator “OR”, the quality
information is affected by device status (stVal). Table 4.7-5 shows two-input-signals (A, B) and
the output signal for “OR”
Table 4.7-5 Output signals (stVal–Quality) of OR
Input B (stVal–Quality)
0–OK
0–NG
1–OK
1–NG
Input A
(stVal–Quality)
0–OK
0–OK
–
–
–
0–NG
0–NG
0–NG
–
–
1–OK
1–OK
1–OK
1–OK
–
1–NG
1–NG
1–NG
1–OK
1–NG
As shown in Table 4.7-5, if ‘0’ represents the status value “stVal” for all input signals, and
if the quality information of “NG” is given for an input signal, then the output signal “Quality”
is represented as “NG”. On the other hand, if all input signals “stVal” are represented by “1”,
and if the quality information for the input signals “stVal(1)” is given, then the representation
“OK” can be weighted for the output signal “Quality” . Note that quality information (OK) for
input signals with “stVal(1)” get priority if there are two or more input signals, which are
represented as “stVal(1)”.
Figure 4.7-6 shows the logic symbol for the interlock operator “OR” with input signals and an
output signal, which can be represented by equations (4.7-13) and (4.7-14).
stVal
Quality
stVal
Quality
OR (+)
Output
Input(A)
Input(B)
stVal
Quality
Figure 4.7-6 Interlock operator (OR) and Input/Output signals
stVal=stVa(A)+stVa(B)
(4.7-13)
Quality=!((stVal(A)•!Quality(A))•(stVa(B)•!Quality(B))+
!(stVal(A)+Quality(A)+stVal(B)+Quality(B)))
(4.7-14)