FC 36 - Qualified OR (8-Input)

Qualified OR (8-Input)
Function Code 36
S1
S2
S3
S4
S5
S6
S7
S8
The qualified OR function code monitors the status of up to
eight digital inputs and produces an output signal based upon
conditions set by S9 and S10. The output is a logic 1 or 0 and
is based upon the number of inputs being less than, equal to,
or greater than the number specified in S9 and the condition
set by S10.
(3 6 )
Q OR N
Outputs
Blk
Type
N
B
Description
Output equals:
Logic 0 when:
No. of logic 1 inputs < S9
Logic 1 when:
S10 = 0 and no. of logic 1 inputs ³ S9
or
S10 = 1 and no. of logic 1 inputs = S9
Specifications
Spec
Tune
Default
Type
Range
S1
N
0
I
Note 1
Block address of first input
S2
N
0
I
Note 1
Block address of second input
S3
N
0
I
Note 1
Block address of third input
S4
N
0
I
Note 1
Block address of fourth input
S5
N
0
I
Note 1
Block address of fifth input
S6
N
0
I
Note 1
Block address of sixth input
S7
N
0
I
Note 1
Block address of seventh input
S8
N
0
I
Note 1
Block address of eighth input
S9
N
0
I
0-8
Number of inputs that must equal logic 1
S10
N
0
B
0 or 1
Select inputs:
0 = no. of logic 1 inputs ³ S9
1 = no. of logic 1 inputs = S9
NOTES:
1. Maximum values are:
WBPEEUI210504B0
Description
9,998 for the BRC-100, IMMFP11/12
31,998 for the HAC
36 - 1
Applications
Applications
This function can monitor a group of devices to determine if a
certain number of the devices are operational at any given
time. Figure 36-1 illustrates the use of function code 36 to
monitor the number of pumps running and limit demand
when less than two are operational. The output of the qualified
OR block serves as a transfer signal for an analog transfer
block. If less than two pumps are running, the output of the
analog transfer block will be the constant identified in the
manual set constant block, and if two or more pumps are running, the output equals the input from the process.
A
INPUT
FROM
PROCESS
(2)
215
S1
S2
S3
S1 = 50.000
S1
S2
(9)
225
S4 = 0.000
S5 = 0.000
S3
S4
S5
T
QOR
(36)
220
S6
S7
S8
PUMP STATUS
S9 = 2
S10 = 0
T01639A
Figure 36-1. Signal Regulation Based on the Number of Pumps Operational
36 - 2
WBPEEUI210504B0

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