CTI Products RCD Standard - Remote Comparator Display - Manual (Page 98)

MCN Remote Comparator Display Appendix A
CTI Products, Inc. Changing Status Message Text
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The ALM-CTRL category contains two sub-categories. One sub-category is made
up of alarm status messages and the other is made up of control status messages.
Notice in the ALM-CTRL category that bit 6 (I/O bit 3, “DIS”) of the input value
field (40 hex binary weight) is 0 for the alarm sub-category and 1 for the control
sub-category.
Again, the sub-categories are created by using one or more of the input status
signals from Table 2 to create a sub-category index. In the example in Figure 38,
only one input status signal is used as the sub-category selector, the FAIL status
signal, which is the 40 hex binary weight input. For each receiver that is assigned
to the alarm sub-category, the FAIL status signal must be left floating, since the
sub-category selector is a logic 0. For each receiver that is assigned to the control
sub-category, the FAIL status signal must be tied to ground, since the sub-
category selector is a logic 1.
The following tables show how many sub-categories can be created in a single
category by reserving various input status signals for the selector.