Watlow SD Series - Page 30

Watlow Series SD • 28 • Chapter 5 Setup
Display Parameter Name
Description
Settings Range
(Integer values for Modbus in
parenthesis.)
Default Modbus*
(less 40,001
offset)
Read/Write
Appears if:
[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. op-
erating
range
(J type):
{``tc}
-328:
{`rtd}
-999:
[`MA},
[uolt]
and
[`Mu].
*240, 241
R/W
(thermo-
couple)
*244, 245
R/W
(RTD)
*248, 249
R/W
(mA, V
or mV)
Always active.
[SP;hi]
[SP.hi]
Set Point High Limit
Set the high range for the set
point.
[rg;Lo] to max. operat-
ing range (of sensor): if
{`sen} is set to {``tc}
[SP;Lo] +0.100 to 1472: if
{`sen} is set to {`rtd}
[SP;Lo] +0.001 to 9999: if
{`sen} is set to [`MA],
[uolt] or [`Mu]. (Set
precision with [P;dEC],
Process Decimal Places)
Max. op-
erating
range
(J type):
{``tc}
1472:
{`rtd]
999:
[`MA],
[uolt]
and
[`Mu].
*242, 243
R/W
(thermo-
couple)
*246, 247
R/W
(RTD)
*250, 251
R/W
(mA, V
or mV)
Always active.
[Ftr;E]
[Ftr.E]
Input Filter
Select filtering action.
[`OFF] (0) (no filtering)
[DiSP] (1) (filter only the
display value)
[CntL] (2) (filter the con-
trol input values)
[both] (3)
[`OFF] ( 0)
89 R/W Always active.
[FLtr]
[FLtr]
Filter Value
Set the input filter value.
0.0 to 60.0 seconds (0000
to 60000)
0.0 *87, 88
R/W
[Ftr;E] is not set to
[`OFF].
[Ot`1]
[Ot 1]
Output 1 Function
Set Output 1 function.
[`OFF] Off (0)
[Pr;AL] Process Alarm (1)
[dE;;AL] Deviation Alarm (2)
[hEAt] Heat Control (3)
[CooL] Cool Control (4)
[E;out] Event (5) ***
[rmt] Retransmit (6)
[hEAt] (3)
143 R/W
Always
active.
Active only if Output 1
is a process output (SD_
_ - _ F _ _ - _ _ _ _)
[Ctr1]
[Ctr1]
Control Method 1
Set output 1 control type. This
parameter is only used with PID
control, but can be set anytime.
[`Ftb] Fixed Time Base
(0)
[Urtb] Variable Time
Base (1)
[`Ftb] (0)
144 R/W
[Ot`1] is set to [hEAt]
or [CooL] and output
type is SD_ _-_ C _ _-_
_ _ _ or SD_ _-_ K _ _-_
_ _ _.
[Ftb1]
[Ftb1]
Fixed Time Base 1 (Cycle
Time)
Set the time base for Fixed Time
Base Control.
1.0 to 60.0 seconds if Out-
put 1 is a mechanical
relay (1000 to 60000)
0.1 to 60.0 seconds if Out-
put 1 is not a mechani-
cal relay (100 to 60000)
20.0: mech.
relay
5.0: solid-
state
relay
1.0:
switched
dc
*145, 146
R/W
[Ot`1] is set to [hEAt]
or [CooL], [Ctr1] is set
to [`Ftb] and Output 1
is not a process output.
(not SD_ _ - _ F _ _ - _
_ _ _ )
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-_ _ _ _- _ _ _ _ ).