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Operation
NOTE:
The upper display will
always return to the
process value after 1
minute without key
strokes.
Figure 32 -
The Operation Menu
75
SP2
Pb1
Pb2
18
WATLOW Series 945 User's Manual
Operation Menu
In the Operation menu, the 945 operates as a digital set point control. All outputs
are turned OFF when set point is set to OFF.
= Parameter may not appear
depending on control configuration
= Only appears if your unit has communications.
See the Series 945 data communications
manual for more information.
[Control Set Point or
75
Remote Set Point ]
(
)
Set point 2
SP2
(
)
Proportional band 1
Pb1
(
)
Proportional band 2
Pb2
rE1/It1
(
)
Reset 1/Integral 1
(
)
rE2/It2
Reset 2/Integral 2
(
)
rA1/dE1
Rate 1/Derivative 1
(
)
Rate 2/Derivative 2
rA2dE2
Operation Parameters
Set Point 1 or Remote Set Point 1: Sets the operating set point for the control
outputs. Appears if L-r = L, see Page 20. If L-r = R, this parameter represents the
remote set point. Range: OFF / rL to rH
Set Point 2: Sets the operating set point for Output 2 when control mode is ht/ht or
CL/CL. Appears when Ot1 and Ot2 are the same, and functions as an ON/OFF
control. Range: rL to rH
Proportional Band: Expressed in degrees, process units or % of span, within which
a controller proportioning function is active for Output 1 or 2. When PbX = 0, it
functions as an ON/OFF control. The switching differential is then determined by the
corresponding HYSX parameter. Pb1 is always visible. Pb2 will not appear if your unit
does not have Output 2, Ot2 = no, or Ot2 is the same value as Ot1. Also dependant
on the dFL parameter in the Calibration menu.
If dFL = US: Range: 0 to 999°F/0 to 555°C/0 to 999 Units; 0.0 to 9.9°F/0.0 to 5.5°C/
0.0 to 9.9 Units Defaults: Pb1 = 25°F/2.5°F
If dFL = SI: Range: 0 to 999.9% of span Defaults: Pb1 = 3.0%
M
Mode Key
Default: Dependent on input range
Default: Same as primary set point.
(
)
Cycle time 1
Ct1
Cycle time 2
(
)
Ct2
(
)
Dead band
db
(
)
A1LO
Alarm 1low
A1HI
(
)
Alarm 1 high
A2LO
(
)
Alarm 2 low
(
)
A2HI
Alarm 2 high
(
)
Calibration offset
CAL
(
)
AUt
Auto-tune
CLUP (
)
Control limit update
(
)
L - r
Local-remote
Pb2 = 0
Pb2 = 0.0%
Setup, Chapter 4
- Quick Links:
- How to Tune and Operate
Hide quick links:
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