Toshiba GR200 Series - (iii)-3 NOR interlock operator

6F2S1914 (0.49)
GRL200 (Soft 033 & 037)
- 831 -
For example, when the interlock operator “OR” has two input signals (0–NG, 0–OK), it
has to generate a signal (0–NG) using the equations (4.7-13) and (4.7-14). This is because the
quality “NG (i.e., 1)” and the quality “OK (i.e., 0)” are entered into the OR operator; the OR
operator produces one (1) which is defined as “NG” in ‘Quality’. A note regarding the values
used for Quality can be found immediately below Table 4.7-3
NOR interlock operator
When quality information (Quality) is applied to the interlock operator “NOR”, the “NOR”
operator outputs the quality information intact. That is, the “NOR” interlock operator outputs
quality information, which is not influenced by device status (stVal). Table 4.7-6 shows an
input-signal (A) and the output signal for the “NOR” interlock operator.
Table 4.7-6 Output signals (stVal–Quality) of NOT
Output (stVal–Quality)
Input A
(stVal–Quality)
0–OK
1–OK
0–NG
1–NG
1–OK
0–OK
1–NG
0–NG
Figure 4.7-7 depicts the logic symbol for the interlock operator “NOT” with input signals
and an output signal, which can be represented by equations (4.7-15) and (4.7-16).
stVal
Quality
stVal
Quality
Output
Input(A)
Input(B)
stVal
Quality
NOT(!)
Figure 4.7-7 Interlock operator (NOT) and In/Output signals
stVal=!stVa(A)
(4.7-15)
Quality=Quality(A)
(4.7-16)