Watlow Series SD PID Profiling Controller - Manual (Page 27)

Wa t l o w S e r i e s S D • 2 5 • C h a p t e r 4 H o m e
Note: Some values will be rounded off to fit in the four-character display. Full values can be read with Modbus. All temperature
parameters 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.
** Static set point version only (SD_C-_ _ _ _- _ _ _ _ ).
4
Chapter 4: Home Page
Press the Infinity Key ˆ at any time to go to the Home Page.
Depending upon the controller’s status, you will see some combination of the parameters listed below. Normally,
you will see the Process Value in the upper display and the Set Point in the lower display. See Home Page Over-
view in the Keys and Displays chapter.
After 60 seconds with no key presses, the controller reverts to the Home Page.
Display Parameter Name
Description
Settings Range
(Integer values for Mod-
bus in parenthesis.)
Default Modbus*
(less 40,001
offset)
Read/Write
Appears if:
Measured
Value Process Value
Displays the current process value in the
upper (left in 1/32 DIN) display.
-1999 to 9999 degrees
or units (-1999000 to
9999000)
NA *20, 21 R There is no input er-
ror and
[Ftr;E] is set
to [`Off] or [CntL].
Set Value Closed Loop Set Point
Show the current closed loop control set
point in the lower (right in 1/32 DIN)
display.
Set Point Low Limit
[SP;Lo] to Set Point
High Limit
[SP;hi]
[`OFF] Stop controlling
to SP (-200000001)
75 *27, 28
R/W Control mode is
[auto] and there is
no input error.
Measured
Value Filtered Process Value
Displays the current filtered process value
in the upper (left in 1/32 DIN) display.
-1999 to 9999 degrees
or units (-1999000 to
9999000)
NA *22, 23 R There is no input er-
ror and
[Ftr;E] is set
to [Disp] or [both].
Set Value Open Loop Output Power
Show the current open loop (manual) con-
trol set point in the lower (right in 1/32
DIN) display.
The % indicator light is on when the con-
troller is in open loop (manual control).
-100.0 to 0.0% if any out-
put is set to cool;
0.0 to 100.0% if any
output is set to heat
(-10000 to 0000, 0000
to 10000. Two decimal
places implied for Mod-
bus.)
0.0% 26 R/W Control mode is
[Man]. If there is
no input error and
[Ftr;e] is set to
[`Off] or [Cont].
[``rP] Current Ramp Set Point**
The current working control set point for
the ramp that is in process appears in the
lower (right in 1/32 DIN) display after
this prompt appears.
-1999 to 9999
(-1999000 to 9999000)
NA *254, 255
R Static set point ver-
sion only and ramp to
set point active.
(SD _C - _ _ _ _ - _ _ _ _ )
[rp;tg] Ramp Target Set Point
The target set point for the ramp that is
in process appears in the lower (right in
1/32 DIN) display abter this prompt ap-
pears.
Set Point Low Limit
[SP;Lo] to Set Point
High Limit
[SP;hi]
NA Same as
closed loop
set point. Static set point ver-
sion only and ramp to
set point active.
(SD _C - _ _ _ _ - _ _ _ _ )
[Er;In] Input Error
Indicate an input error state.
None (0)
[----] Error (1) NA 24 R There is an analog in-
put error
[A1;Lo] Alarm Low 1 Status
Indicate a low alarm at output 1.
None (0)
Alarm (1) NA 29 R There is an Alarm 1
low side alarm.
[A1;hi] Alarm High 1 Status
Indicate a high alarm at output 1.
None (0)
Alarm (1) NA 30 R There is an Alarm 1
high side alarm
[A2;Lo] Alarm Low 2 Status
Indicate a low alarm at output 2.
None (0)
Alarm (1) NA 31 R There is an Alarm 2
low side alarm.
[A2;hi] Alarm High 2 Status
Indicate a high alarm at output 2.
None (0)
Alarm (1) NA 32 R There is an Alarm 2
high side alarm
[A3;Lo] Alarm Low 3 Status
Indicate a low alarm at output 3.
None (0)
Alarm (1)
NA 33 R There is an Alarm 3
low side alarm
[A3;hi] Alarm High 3 Status
Indicate a high alarm at output 3.
None (0)
Alarm (1) NA 34 R There is an Alarm 3
high side alarm.