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COMP interlock operator
When quality information (Quality) is applied to the interlock operator "COMP", the "COMP"
operator outputs the original quality information intact. That is, the "COMP" interlock
operator outputs quality information, which is not influenced by device status (stVal). Table
4.4-6 shows two input-signals (A and B) and the output signal for the "COMP" interlock
operator.
Table 4.4-6 Output signals (stVal–Quality) of COMP
Figure 4.4-8 depicts the logic symbol for the interlock operator "COMP" with input signals
and an output signal, which can be represented by equations (4.4-17) and (4.4-18).
stVal=stVa(A) COMP stVa(B)
Quality=Quality(A) †
†Note: Input signal (B) does not have quality information because its signal is a
threshold value.
Input(A)
Input(B)
Figure 4.4-8 Interlock operator (COMP) and Input/Output signals
Device status output by control functions transposed
As shown in Figure 4.4-3, a node inputs a value (stVal). The user should be aware that the
node cannot directly read the value of device status generated by the control functions. This is
because each control function generates the device status in a different format. Thus, for the
ILK operation, the device status generated should be transposed to the stVal so that the node
can read the device status. The right-hand column of Table 4.4-7 shows the transposed "stVal"
in each node.
0–OK
0–NG 1–NG
Input A
(stVal–Quality)
1–OK
1–NG 0–NG
COMP
stVal
Quality
stVal
- 589 -
Input B (stVal)†
0
1
1–OK
0–OK
0–NG
0–OK
1–OK
1–NG
stVal
Output
Quality
6F2T0207 (0.01)
(4.4-17)
(4.4-18)
GRE200 (5,6)
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