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Description
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(Original Document)
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Description
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(Original Document)
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Name in LL984 Editor
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Function Block Name
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|---|---|
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name of legacy 984 instruction
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name in other tools and editors like:
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Input Pin
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Name
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Data Type
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Address Range
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Meaning
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|---|---|---|---|---|
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Top
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ENABLE
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–
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ON = enables process control function
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|
Node
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Node Type
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Name
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Data Type
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Address Range
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Meaning
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|---|---|---|---|---|---|
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Middle
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IN/OUT
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PAR
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ARRAY[1...36] OF UINT
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%MW
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see Parameter PAR below
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Bottom
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IN
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LEN
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UINT
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36
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length of parameter block (can not be changed)
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Output Pin
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Name
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Data Type
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Address Range
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Meaning
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|---|---|---|---|---|
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Top
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OUT
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BOOL
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–
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ON = operation successful
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Bottom
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ERR
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BOOL
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–
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ON = operation not successful
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|
-
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Word
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Content
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Format
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|---|---|---|---|
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General Parameters
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1, 2
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live input, x
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REAL (Floating Point)
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3
|
output status, high and low limits exceeded
output status
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WORD
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4
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output status, detected error in negative integral time or high/low limit setting
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WORD
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5
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reserved
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WORD
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6
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input status (standard input bits, manual, halt, reverse, direct)
input status
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WORD
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Inputs
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7, 8
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set point, SP
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REAL (Floating Point)
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9, 10
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manual output
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REAL (Floating Point)
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11, 12
|
calculated control difference (calculated error value), XD
|
REAL (Floating Point)
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Outputs
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13
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previous operating mode (not used)
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UINT
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14, 15
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time delta T (in ms) since last solve
|
UDINT
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16, 17
|
previous system deviation, XD_1
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REAL (Floating Point)
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18, 19
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integral part of output YI
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REAL (Floating Point)
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20, 21
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previous input, X_1 (not used)
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REAL (Floating Point)
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22
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previous operating status (not used)
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UINT
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Timing Information
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23, 24
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10 ms clock at time n
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UDINT
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25, 26
|
solution interval (in ms) (not used)
|
UDINT
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Input Parameters
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27, 28
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proportional rate, KP
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REAL (Floating Point)
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29, 30
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reset time, TI (in sec)
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REAL (Floating Point)
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31, 32
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high limit on output Y
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REAL (Floating Point)
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33, 34
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low limit on output Y
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REAL (Floating Point)
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Output
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35, 36
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manipulated output variable, Y
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REAL (Floating Point)
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Control Expert-IEC bits
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Function
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|---|---|
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0...7
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standard output bits (flags)
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8...12
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not used
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13
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1 = high limit exceeded
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14
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1 = low limit exceeded
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15
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error detected
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Control Expert-IEC bits
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Function
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|||||
|---|---|---|---|---|---|---|
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0...4
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detected error conditions
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|||||
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Bit 4
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Bit 3
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Bit 2
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Bit 1
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Bit 0
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Description
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1
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0
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1
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1
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0
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negative integral time constant
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1
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0
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1
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0
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1
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high/low limit error detected (low > high)
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1
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0
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1
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0
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0
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KP is negative
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5...15
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not used
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|||||
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Control Expert-IEC bits
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Function
|
|---|---|
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0
|
1 = reverse action for loop output
0 = direct action for loop output
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1...8
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not used
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9
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1 = halt mode
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10
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1 = manual mode
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11
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not used
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12...15
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standard input bits (flags)
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