Watlow Series SD • 41 • Chapter 7 Operations for TRU-TUNE+™
Display Parameter name
Description
Settings Range Default Modbus*
(less 40,001 offset)
Read/Write
Appears if"
[dE;hc]
[dE.hc]
Derivative
Set the PID derivative time in
seconds for all outputs.
0.00 to 3,600 seconds
(0000 to 3600)
0.00: disabled
0.00 *345, 346 R/W
TRU-TUNE+
™ ver-
sion only. (SD_E - _ _
_ _ - _ _ _ _ ). [ht;m]
and/or [CL;m] is set
to [`PId].
[dB;hc]
[db.hc]
Dead Band
Set an offset of the propor-
tional band from the set point.
0 to 999 (0000 to 999000) 0 *347, 348 R/W
TRU-TUNE+
™ ver-
sion only. (SD_E - _ _
_ _ - _ _ _ _ ). [ht;m]
and/or [CL;m] is set
to [`PId].
[h;hyS]
[h.hyS]
Heat Hysteresis
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.
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)
1.0 1.000 *232, 233 R/W
*234, 235 R/W
At least one output
is set to [hEAt],
and [ht;m] is set to
[on;oF].
[CL;m]
[CL.M]
Cool Control Method
Set the Cool Control Method
[`OFF] off (0)
[`PId] PID (1)
[on;oF] on-off (2)
[`OFF]
(0)
214 R/W At least one output is
set to [CooL].
[Pb;CL]
[Pb.CL]
Proportional Band Cool
Set the proportional band for
the cool outputs.
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)
25 25.000 *337, 338 R/W
*341, 342 R/W
At least one output
is set to [Cool],
and [CL;m] is set to
[`PId].
[C;hyS]
[C.hyS]
Cool Hysteresis
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.
1 to 999°F if [`Sen] is
set to [``tc] or [`rtd]
(1000 to 999000)
0.000 to 999.9 if [`Sen] is
set to [`ma] or [uolt]
(0000 to 999000)
1
1.000
*236, 237 R/W
*238, 239 R/W
At least one output
is set to [CooL]
and [CL;m] is set to
[on;oF].
[ProP]
[ProP]
Proportional Term
View the active proportional
term for PID diagnostics.
0.000 to 1.000****
(0000 to 1000)
NA 258 R Any output is set to
[heat] or [Cool].
[``it]
[ it]
Integral Term
View the active integral term
for PID diagnostics.
0.000 to 1.000****
(0000 to 1000)
NA 259 R Any output is set to
[heat] or [Cool].
[``dE]
[ dE]
Derivative Term
View the active derivative
term for PID diagnostics.
0.000 to 1.000****
(0000 to 1000)
NA 260 R Any output is set to
[heat] or [Cool].
[A1;hi]
[A1.hi]
Alarm 1 High
Set the high alarm set point.
Deviation: 0 to 9999 (0000
to 9999000)
Process: range of sensor, if
[`SEN] is set to [``tc]
or [`rtd]
-1999 to 9999 if [`SEN] is
set to [`Ma] or [uolt].
(-1999000 to 9999000)
999 (dev)
1500 (pro)
*100, 101 R/W
(dev)
*104, 105 R/W
(pro)
[Ot`1] is set to
[dE;AL] or [Pr;AL].
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.
**** This value multiplied by 100 equals the percent power.
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