User guide
Watlow Series SD Limit ■ 25 ■ Chapter 5 Setup
Display Parameter Name
Description
Settings Range
(Integer values for Modbus
in parentheses.)
Default Modbus*
(less 40,001
offset)
Read/Write
Appears if:
Note: Some values will be rounded off to fit in the four-character display. Full values can be read with Modbus. All temperature parame-
ters are in °F through Modbus.
* 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.
[Sc;Lo]
[Sc.Lo]
Process Scale Low
Set the low scale for process inputs.
1.00 to 20.00 mA: if
[`Sen]
is set to
[`mA]
(1000 to 20000)
0.50 to 10.00V: if
[`Sen]
is
set to
[uoLt]
(500 to 10000)
10.00 to 50.00 mV: if
[`Sen]
is set to
[~mu]
(10000 to 50000)
4.00 mA
1.00V
10.00 mV
*73, 74
R/W (mA)
*77, 78
R/W (V)
*331, 332
R/W (mV)
[`Sen]
is set to
[`mA]
,
[`Sen]
is set to
[uolt].
[`Sen]
is set to
[`mu].
[Sc;hi]
[Sc.hi]
Process Scale High
Set the high scale for process inputs.
1.00 to 20.00 mA: if
[`Sen]
is set to
[`mA]
(1000 to 20000)
0.50 to 10.00V: if
[`Sen]
is
set to
[uoLt]
(500 to 10000)
10.00 to 50.00 mV: if
[`Sen]
is set to
[~mu]
(10000 to 50000)
10.00 to 20.00 mA
(1000 to 2000)
5.00 to 10.00 V
(500 to 1000)
25.00 to 50.00 mV
(2500 to 5000)
(two decimal places implied
for Modbus)
20.00 mA
5.00V
50.00 mV
*75, 76
R/W (mA)
*79, 80
R/W (V)
*333, 334
R/W (mV)
[`Sen]
is set to
[`mA]
,
[`Sen]
is set to
[uolt]
.
[`Sen]
is set to
[`mu]
[rg;Lo]
[rg.Lo]
Units Scale Low
Set the low range for process input units.
-1999 to 9999
(-1999000 to 9999000)
(Set precision with
[P;dEC]
,
Process Decimal Places.)
-1999
*81, 82
R/W
[`Sen]
is set to
[`mA]
or
[uolt]
.
[rg;hi]
[rg.hi]
Units Scale High
Set the high range for process input units.
1.00 to 10.00 mA
(100 to 1000)
0.50 to 5.00 V
(050 to 500)
5.00 to 25.00 mV
(500 to 2500)
(two decimal places implied
for Modbus)
-1999 to 9999
(-1999000 to 9999000)
(Set precision with
[P;dEC]
,
Process Decimal Places.)
9999
*83, 84
R/W
[`Sen]
is set to
[`mA]
or
[uolt]
.
[SP;Lo]
[SP.Lo]
Set Point Low Limit
Set the low range for the set point.
Min. operating range (of
sensor) to
[SP;Hi]
-0.100: if
{`sen}
is set to
{``tc}
-328 to
[SP;hi]
-0.100: if
{`sen] is set to {`rtd}
-1999 to
[SP;hi]
-0.001: if
{``sen}
is set to
[`MA]
,
[uolt],
or
[`Mu].
(Set precision with
[P;dEC]
,
Process Decimal Places.)
Min. operat-
ing range (J
type):
{``tc}
-328:
{`rtd}
-999:
[`MA]
,
[uolt],
and
[`Mu].
*231, 232
R/W (ther-
mocouple)
*235, 236
R/W (RTD)
*239, 240
R/W (mA, V,
or mV)
Always active.
20.00 mA
10.00 V
50.00 mV
[P1;LE]
[P1.LE]
Process Input Low Error
Set the low process value that will cause
an error to occur for the process input.
1.00 mA
0.50 V
5.00 mV
325 R/W
(mA)
327 R/W
(V)
329 R/W
(mV)
[`Sen]
is set to
[`mA]
.
[`Sen]
is set to
[uolt]
.
[`Sen]
is set to
[`mu]
.
[P1HE]
[P1.HE]
Process Input High Error
Set the high process value that will cause
an error to occur for the process input.
326 R/W
(mA)
328 R/W
(V)
330 R/W
(mV)
[`Sen]
is set to
[`mA]
.
[`Sen]
is set to
[uolt]
.
[`Sen]
is set to
[`mu]
.