User guide

Watlow EZ-ZONE
®
PM PID Controller • 40 • Chapter 5 Operations Page
Operations Page
Display
Parameter Name
Description
Range Default
Modbus Rela-
tive Address
CIP
Class
Instance
Attribute
hex (dec)
Pro-
fibus
Index
Param-
eter ID
Data
Type
&
Read/
Write
[`id;S]
[ id.S]
Control Loop (1)
Idle Set Point
Set a closed loop set point
that can be triggered by
an event state.
Low Set Point to High
Set Point (Setup
Page)
75.0°F
or
units
24.0°C
Instance 1
Map 1 Map 2
2176 2656
0x6B (107)
1
9
50 7009 float
RWES
[`h;Pb]
[ h.Pb]
Control Loop (1)
Heat Proportional Band
Set the PID proportional
band for the heat outputs.
0.001 to 9,999.000°F or
units
0.001 to 5,555.000°C
25.0°F
or
units
14.0°C
Instance 1
Map 1 Map 2
1890 2370
0x97 (151)
1
6
65 8009 float
RWES
[`h;hy]
[ h.hy]
Control Loop (1)
Heat Hysteresis
Set the control switching
hysteresis for on-off con-
trol. This determines how
far into the “on” region
the process value needs
to move before the output
turns on.
0.001 to 9,999.000°F or
units
0.001 to 5,555.000°C
3.0°F or
units
2.0°C
Instance 1
Map 1 Map 2
1900 2380
0x97 (151)
1
0xB (11)
66 8010 float
RWES
[`C;Pb]
[ C.Pb]
Control Loop (1)
Cool Proportional Band
Set the PID proportional
band for the cool outputs.
0.001 to 9,999.000°F or
units
0.001 to 5,555.000°C
25.0°F
or
units
14.0°C
Instance 1
Map 1 Map 2
1892 2372
0x97 (151)
1
7
67 8012 float
RWES
[`C;hy]
[ C.hy]
Control Loop (1)
Cool Hysteresis
Set the control switching
hysteresis for on-off con-
trol. This determines how
far into the “on” region
the process value needs
to move before the output
turns on.
0.001 to 9,999.000°F or
units
0.001 to 5,555.000°C
3.0°F or
units
2.0°C
Instance 1
Map 1 Map 2
1902 2382
0x97 (151)
1
0xC (12)
68 8013 float
RWES
[``ti]
[ ti]
Control Loop (1)
Time Integral
Set the PID integral for
the outputs.
0 to 9,999 seconds per
repeat
180 sec-
onds
per
repeat
Instance 1
Map 1 Map 2
1894 2374
0x97 (151)
1
8
69 8006 float
RWES
[``td]
[ td]
Control Loop (1)
Time Derivative
Set the PID derivative
time for the outputs.
0 to 9,999 seconds 0
seconds
Instance 1
Map 1 Map 2
1896 2376
0x97 (151)
1
9
70 8007 float
RWES
[``dB]
[ db]
Control Loop (1)
Dead Band
Set the offset to the
proportional band. With
a negative value, both
heating and cooling out-
puts are active when the
process value is near the
set point. A positive value
keeps heating and cooling
outputs from fighting each
other.
-1,000.0 to 1,000.0°F
or units
-556 to 556°C
0 Instance 1
Map 1 Map 2
1898 2378
0x97 (151)
1
0xA (10)
71 8008 float
RWES
[`o;SP]
[ o.SP]
Control Loop (1)
Open Loop Set Point
Set a fixed level of output
power when in manual
(open-loop) mode.
-100 to 100% (heat and
cool)
0 to 100% (heat only)
-100 to 0% (cool only)
0.0 Instance 1
Map 1 Map 2
2162 2642
0x6B (107)
1
2
51 7002 float
RWES
Note:
Some values will be rounded off to fit in the four-character display. Full values can be
read with other interfaces.
R: Read
W: Write
E: EE-
PROM
S: User
Set