Watlow SD Series User Manual page 39

Pid controller/pid profiling controller
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Display
Parameter name
Description
[It; h t]
Integral Heat
[It.ht]
Set the PID integral in min-
utes per repeat for the heat
outputs.
[rA; h t]
Rate Heat
[rA.ht]
Set the PID rate time in min-
utes for the heat output.
[dE; h t]
Derivative Heat
[dE.ht]
Set the PID derivative time in
minutes for the heat outputs.
[dB; h t]
Dead Band Heat
[db.ht]
An offset of the heating pro-
portional band from the set
point.
[h; h yS]
Heat Hysteresis
[h.hyS]
Set the control switching hys-
teresis for on-off control. This
determines how far into the
"on" region the input needs to
move before the output actu-
ally turns on.
[CL; m ]
Cool Control Method
[CL.M]
Set the Cool Control Method
[Pb; C L]
Proportional Band Cool
[Pb.CL]
Set the proportional band for
the cool outputs.
[rE; C L]
Reset Cool
[rE.CL]
Set the PID reset in repeats
per minute for the cool out-
put.
[It; C L]
Integral Cool
Set the PID integral in min-
[It.CL]
utes per repeat for the cool
outputs.
[rA; C L]
Rate Cool
[rA.CL]
Set the PID rate time in min-
utes for the cool outputs.
Note: Parameters appear in the Operations Page only if activated from the programming page. See page 22 for Operations Page defaults.
Note: Some values will be rounded off to fit in the four-character display. Full values can be read with Modbus. All temperature param-
eters through Modbus are in °F, by default.
* 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-_ _ _ _- _ _ _ _ ).
**** This value multiplied by 100 equals the percent power.
Watl o w S eri es SD
Settings
Range
0.00 to 99.99 minutes/per
repeat (0000 to 99990)
0.00: disabled
0.00 to 9.99 minutes (0000
to 9990)
0.00: disabled
0.00 to 9.99 minutes (0000
to 9990)
0.00: disabled
0 to 999 (0000 to 999000)
1 to 999 degrees, if [`Sen]
is set to [``tc] or
[`rtd] (1000 to 999000)
0.000 to 999.999 units, if
[`Sen] is set to [`ma]
or [uolt] (0000 to
999999)
[`OFF] off (0)
[`PId] PID (1)
[on; o F] on-off (2)
1 to 999°F if [`Sen] is
set to [``tc] or [`rtd]
(1000 to 999000)
0.000 to 999.0 if [`Sen] is
set to [`ma] or [uolt]
(0000 to 999000)
0.00 to 99.99 repeats per
minute (0000 to 99990)
0.00: disabled
0.00 to 99.99 minutes per
repeat (0000 to 99990)
0.00: disabled
0.00 to 9.99 minutes (0000
to 99990)
0.00: disabled
37
Default
Modbus*
(less 40,001 offset)
Read/Write
0.00
*224, 225 R/W
0.00
*228, 229 R/W
0.00
.*228, 229 R/W
0
*279, 280 R/W
1.0 1.000
*232, 233 R/W
*234, 235 R/W
[`OFF]
214 R/W
(0)
25 25.000
*218, 219 R/W
*222, 223 R/W
0.00
*226, 227 R/W
(Modbus value
is integral,
which is the in-
verse of reset.)
0.00
*226, 227 R/W
0.00
*230, 231 R/W
Appears if"
At least one output is
set to [hEAt], [ht; m ]
is set to [`PId],
and [Unit] is set to
[``SI].
At least one output is
set to [hEAt], [ht; m ]
is set to [`PId],
and [Unit] is set to
[``US].
At least one output is
set to [hEAt], [ht; m ]
is set to [`PId],
and [Unit] is set to
[``SI]
At least one output
is set to [hEAt] and
[ht; m ] is set to PID.
At least one output
is set to [hEAt],
and [ht; m ] is set to
[on; o F].
At least one output is
set to [CooL].
At least one output
is set to [Cool],
and [CL; m ] is set to
[`PId].
At least one output is
set to [CooL], [Cl; m ]
is set to [`PId],
and [Unit] is set to
[``US].
At least one output is
set to [CooL], [CL; m ]
is set to [`PId],
and [Unit] is set to
[``SI].
At least one output is
set to [CooL], [Cl; m ]
is set to [`PId],
and [Unit] is set to
[``US].
Chapter 6 O per a ti ons

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