Watlow SD Series User Manual page 33

Pid controller/pid profiling controller
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Parameter Name
Description
[Ctr3]
Control Method 3
[Ctr3]
Set Output 3 control type. This
parameter is only used with PID
control, but can be set anytime.
[Ftb3]
Fixed Time Base 3 (Cycle
[Ftb3]
Time)
Set the time base for Fixed Time
Base Control.
[PL`3]
Power Limit 3
Set the maximum power output
[ PL3]
for a control output.
[PsL3]
Output Power Scale Low 3
[PSL3]
Set the low end of the range
within which the output will
scale.
[PSh3]
Output Power Scale High 3
[PSh3]
Set the high end of the range
within which the output will
scale
[nLF3]
Output Non-linear Function 3
[nLF3]
Select a non-linear output curve
to match the response of your
system.
[AO3; U ]
Analog Output 3 Units
[AO3.U]
Set the analog process output
units.
[O3; L o]
Output 3 Low Scale
[O3.lo]
Set the low scale for the process
output.
[O3; h i]
Output 3 High Scale
[O3.hi]
Set the high scale for the process
output.
[r3; S o]
Output 3 Retransmit Source
[r3.So]
Set the control variable that the
retransmit signal represents.
Note: Some values will be rounded off to fit in the four-character display. Full values can be read with Modbus. All temperature pa-
rameters through Modbus are in °F, by default. Writing to register 18 will toggle between °F and °C.
* Low register numbers contain the two higher bytes; high register numbers contain the two lower bytes of the four-byte integer.
Decimal precision is implied at three decimal places unless otherwise noted.
** Static set point version only (SD_C-_ _ _ _- _ _ _ _ ).
*** Profiling version only (SD_R-_ _ _ _- _ _ _ _ ).
Watl o w S eri es SD
Settings
Range
(Integer values for Modbus in
parenthesis.)
[`Ftb] Fixed Time Base
(0)
[Urtb] Variable Time
Base (1)
1.0 to 60.0 seconds if Out-
put 3 is a mechanical
relay (1000 to 60000)
0.1 to 60.0 seconds if Out-
put 3 is not a mechani-
cal relay (100 to 60000)
0.0 to 100.0% (000 to
10000)
(Two decimal places im-
plied for Modbus.)
0.0 to 100.0% (000 to
10000)
(Two decimal places im-
plied for Modbus.)
0.0 to 100.0% (000 to
10000)
(Two decimal places im-
plied for Modbus.)
[`OFF] Off (0)
[Cru1] curve 1 (1)
[Cru2] curve 2 (2)
[`mA] milliamperes (0)
[uolt] volts (1)
0.00 to 20.00 mA if output
is set to mA (0000 to
20000)
0.00 to 10.00V if output
is set to volts (0000 to
10000)
0.00 to 20.00 mA if output
is set to mA (0000 to
20000)
0.00 to 10.00V if output
is set to volts (0000 to
10000)
[Proc] Process Value (0)
[~~SP] Set Point (1)
31
Default
Modbus*
(less 40,001
offset)
Read/Write
[`Ftb] (0)
179 R/W
[Ot`3] is set to [hEAt]
or [CooL] and output
type is SD_ _-_ _ _ C -_
_ _ _ or SD_ _-_ _ _ K -_
_ _ _.
20.0 (mech.
*180, 181
[Ot`3] is set to [hEAt]
relay)
R/W
or [CooL], and [Ctr3]
is set to [`Ftb], and
5.0 (solid-
Output 3 is not a process
state
output. (not SD_ _ - _ _ _
relay)
F - _ _ _ _ )
1.0
(switched
dc)
100.0%
195 R/W
[Ot`3] is set to [hEAt]
or [CooL].
0%
196 R/W
[Ot`3] is set to [hEAt]
or [CooL], [Ctr3] is set
to [`Ftb] and Output 3
is not a process output.
(not SD_ _ - _ _ _ F -_
_ _ _ )
100.0%
197 R/W
[Ot`3] is set to [hEAt]
or [CooL], [Ctr3] is set
to [`Ftb] and Output 3
is not a process output
(not SD_ _ - _ _ _ F -_ _
_ _ ).
[`OFF] (0)
[Ot`3] is set to [hEAt]
198 R/W
or [CooL].
[`mA] (0)
182 R/W
Output 3 is a process
output. (SD_ _ - _ _ _ F
- _ _ _ _ )
4.00 mA
*183, 184
Output 3 is a process
0.00V
R/W
output. (SD_ _ - _ _ _ F
(mA)
- _ _ _ _ )
*187, 188
R/W (V)
20.00 mA
*185, 186
Output 3 is a process
10.00V
R/W
output. (SD_ _ - _ _ _ F
(mA)
- _ _ _ _ )
*189, 190
R/W (V)
[Proc] (0)
315 R/W
Output 3 is a process
output (SD_ _ - _ _ _ F
- _ _ _ _ ) and [Ot`3] is
set to [rmt].
Appears if:
Chapt er 5 Se tup

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