Transcript
Control Interface Slave Function Code 79 (7 9 ) N N+1 N+2 N+3 N+4 S10
Use the control interface slave function code to interface a Harmony controller to a control I/O module. Control I/O modules have four analog inputs, two analog outputs, three digital inputs, and four digital outputs. This function code defines the characteristics of that I/O module and how the system responds to an I/O module failure.
N+5 S11
Outputs
C IS I/O
N+6 N+7 N+8 S15
Blk
Type
N
R
Analog input 1
S16
N+1
R
Analog input 2
S17 S18
N+2
R
Analog input 3
N+3
R
Analog input 4
N+4
R
Analog output 1 feedback
N+5
R
Analog output 2 feedback
N+6
B
Digital input 1
N+7
B
Digital input 2
N+8
B
Digital input 3
N+9
B
I/O module status flag: 0 = good, 1 = bad
N+9
Description
The control system must be carefully evaluated to establish default values that will prevent personal injury and/or property damage in the case of module failure.
WARNING
Specifications Spec
Tune
Default
Type
Range
S1
N
0
I
0 - 63
S2
N
0.000
R
Full
Analog input 1 zero in engineering units
S3
N
0.000
R
Full
Analog input 1 span in engineering units
S4
N
0.000
R
Full
Analog input 2 zero in engineering units
S5
N
0.000
R
Full
Analog input 2 span in engineering units
S6
N
0.000
R
Full
Analog input 3 zero in engineering units
S7
N
0.000
R
Full
Analog input 3 span in engineering units
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Description Control interface I/O module address
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Specifications (continued) Spec
Tune
Default
Type
Range
S8
N
0.000
R
Full
Analog input 4 zero in engineering units
Description
S9
N
0.000
R
Full
Analog input 4 span in engineering units
S10
N
2
I
0 - 2046
Block address of analog output 1
S11
N
2
I
0 - 2046
Block address of analog output 2
S12
N
2
I
0 or 1
Digital input 1 logic sense
S13
N
2
I
0 or 1
Digital input 2 logic sense
S14
N
2
I
0 or 1
Digital input 3 logic sense
S15
N
2
I
0 - 2046
Block address of digital output 1
S16
N
2
I
0 - 2046
Block address of digital output 2
S17
N
2
I
0 - 2046
Block address of digital output 3
S18
N
2
I
0 - 2046
Block address of digital output 4
S19
N
0
I
0 or 1
Failure action (lack of I/O module response or bad analog input reference voltage): XX0 = trip module XX1 = continue to operate I/O module status flag (bad status indication): 0XX = set I/O module status flag output N+9 to bad when the CIS module fails or is in error mode 1XX = set I/O module status flag output N+9 to bad when the I/O module fails or there is a bad quality on one of the module's I/O points
Explanation Outputs This block provides analog and digital I/O on the same board. The final output is an I/O module status flag, which shows the status of the control I/O module. 0 = good 1 = bad Analog output feedbacks (N+4 and N+5) provide feedback to M/A stations (function code 80) that have hardware stations with bypass capabilities. This feedback signal provides an alignment reference for the software logic, before establishing
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control of the process when exiting from bypass or configure mode (bumpless transfer). NOTE: If S19 equals zero, and if there is a bad or unwired input, then the control module is tripped.
Specifications S1 – IOSLV
(Control I/O module address) I/O module address set by the address dipswitch on the I/O module. Available addresses are zero through 63.
S2 to S9
(AIZn and AISPn) Set the zero and span values for four analog inputs. If an analog value goes below the zero value or exceeds the span by more than five percent, it will produce a bad quality output. A specified span other than zero (default) for an unused analog input produces a bad quality signal for that input.
S10 – AO1
Block address of input for analog output one.
S11 – AO2
Block address of input for analog output two.
S12 to S14 - DIn
Set the logic sense for three digital inputs. Digital inputs can be defined for direct or reverse acting logic operations. These are defined as follows: 0 = reverse acting (logic 0 = closed, logic 1 = open) 1 = direct acting (logic 0 = open, logic 1 = closed) 2 = unused input
S15 to S18 - DOn S19 – FAIL
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Block addresses of the inputs for the four digital outputs. Value defines the module response in case of control I/O module failure. Lack of I/O module response or a bad analog input reference voltage will cause a transfer to error mode.
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Specification S19 also determines which failure conditions cause the I/O module status flag output N+9 to go to logic 1 (bad). X X X Failure Action 0 = trip control module 1 = continue operation Reserved for Future Use I/O Module Status Flag 0 = selects the I/O module status flag output N+9 to equal logic 1 (bad quality) when the I/O module is failed or in error mode. 1 = selects the I/O module status flag output N+9 to equal logic 1 (bad quality) when the control I/O module is in error mode or a defined I/O point (AI, AO, DI or DO) is bad quality.
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