Rockwell Automation 1747-PT1, D1747NP002 Hand-Held Terminal - Manual (Page 366)

Chapter 26
PID Instruction
26–22
(L)
O:1.0
0
(U)
O:1.0
0
(RES)
T4:0
(EN)
(DN)
TON
TIMER ON DELAY
Timer
T4:0
Time Base 0.01
Preset 1000
Accum 0
NEQ
NOT EQUAL
Source A
N7:25
0
Source B 0
GRT
GREATER THAN
Source A
T4:0.ACC
0
Source B N7:25
0
MUL
MULTIPLY
Source A
N7:1
0
Source B T4:0.PRE
1000
Dest N7:25
0
DDV
DOUBLE DIVIDE
Source
16383
Dest N7:25
0
CLR
CLEAR
Dest
S:5
0
PID
PID
Control Block
N7:2
Process Variable N7:0
Control Variable N7:1
Control Block Length 23
END
] [
T4:0
DN
] [
N7:2
13
Cycle Time of the Output
Time Proportioning
Control Variable
Clears Minor Error Flag
PID Instruction
Output Contact
Done Bit
Output as a Fraction
of Cycle Time
Example – Time Proportioning Outputs