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Function Parameter Index Reference
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RS232 Communications Reference Manual
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5.47 PID Function Block
Description
The PID label stands for Proportional, Integral, Derivative (3-mode) control action.
This block is part of
the Loops category. It looks like this graphically on the Control Builder.
INPUT - PV
Remote Set Point Signal (Eng. unit or %)
OTHER INPUTS
CONTROL OUTPUT
Feed Forward value in %
Output Track value in %
Output Track Command (ON/OFF)
Remote Bias Value for Ratio PID
Switch Inputs
(from SWO on LPSW function block
)
External Mode request
(from MDSW block)
Back Calculation Input
(for Cascade control)
Working Set Point in EU
Alarm 1 Digital Signal
Alarm 2 Digital Signal
Autotune Indicator (ON = Autotune in progress)
A/M Output & Setpoint Mode indication
(to MDFL block)
Back Calculation Output
(for Cascade control)
OTHER OUTPUTS
Dynamic Parameters:
Table 5-59 PID Dynamic Parameters
Parameter
Index
Type
Use
R/W
Description
status
0
REAL
C
R
block status (see section 5.2 for code list)
lsp
1
REAL
C
R/W
local set point (eu)
lsp2
2
REAL
C
R/W
local set point 2 (eu)
rem_mode
3
BOOL
C
R/W
remote set point mode request {OFF, ON}
man_mode
4
BOOL
C
R/W
manual output mode request {OFF, ON}
man_out
5
REAL
C
R/W
manual output value –5 to 105 (%)
tune_req
6
BOOL
C
R/W
limit cycle auto-tuning request {OFF, ON}
rsp_eu
7
REAL
C
R
remote set point in eu for monitoring
deviation
8
REAL
C
R
Deviation in eu for monitoring
pv
9
REAL
C
R
Process Variable in eu for monitoring
WSP
10
REAL
O
R
Working setpoint display in eu for
monitoring
OUT
11
REAL
O
R
control output –5 to 105 (%)
MODE
12
REAL
O
R
actual mode encoded
ALl
13
BOOL
O
R
Alarm 1
AL2
14
BOOL
O
R
Alarm 2
Summary of Contents for RS-232
Page 12: ...Overview 2 RS232 Communications Reference Manual 8 99 ...
Page 24: ...Protocol Description 14 RS232 Communications Reference Manual 8 99 ...
Page 36: ...PC Communication Driver 26 RS232 Communications Reference Manual 8 99 ...
Page 143: ...Function Parameter Index Reference 8 99 RS232 Communications Reference Manual 133 ...
Page 150: ...Index 140 RS232 Communications Reference Manual 8 99 ...
Page 151: ......