CTI Products RCD Standard - Remote Comparator Display User Manual
Page 100
MCN Remote Comparator Display
Appendix A
CTI Products, Inc.
Changing Status Message Text
68-10856-210
94
Creating 4 sub-categories
Table 10 shows how four sub-categories can be created by reserving the FAIL and
the DISABLE input status signals (binary weight 40 hex and 20 hex) for the
selector. Up to 4 status messages can be defined for each sub-category, with the
VOTE and RECEIVE input status signals selecting between the status messages
in each sub-category.
Input
Value
Field
Sub-
category
Sub-Category
Selector I/O Bits
FAIL DISABLE
Active Status Signals
00
0
0 0
-
01
0
0 0
VOTE
04
0
0 0
RECEIVE
05
0
0 0
RECEIVE + VOTE
10
1
0 1
-
11
1
0 1
VOTE
14
1
0 1
RECEIVE
15
1
0 1
RECEIVE + VOTE
40
2
1 0
-
41
2
1 0
VOTE
44
2
1 0
RECEIVE
45
2
1 0
RECEIVE + VOTE
50
3
1 1
-
51
3
1 1
VOTE
54
3
1 1
RECEIVE
55
3
1 1
RECEIVE + VOTE
Table 10 - 4 Sub-categories / 4 States Each
Note: In Table 10, any bit or input status signal shown as a 1 is an active input
signal and any bit shown as a 0 is an inactive input signal. For the MCN system,
all I/O signals are active low, so any active input status signal is low at the CIB or
IOB I/O connector and any inactive input status signal is high at the CIB or IOB
I/O connector.