Watlow Ez-Zone PM8 - Page 38

Watlow EZ-ZONE
®
PM PID Controller • 35 • Chapter 5 Operations Page
Operations Page
Display
Parameter name
Description
Range Default
Parameter
Appears in
Menu When
Modbus Rela-
tive Address
CIP
Class
Instance
Attribute
hex (dec)
Profibus
Index
Data
Type
&
Read/
Write
[`id;S]
[ id.S]
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
Always Instance 1
Map 1 Map 2
2176 2656
0x6B (107)
1
9
50 float
RWES
[`h;Pb]
[ h.Pb]
Loop (1)
Heat Proportional
Band
Set the PID propor-
tional band for the
heat outputs.
0.001to9,999.000°F
or units
-1,110.555 to
5,555.000°C
25.0°F
or
units
14.0°C
Heat Algo-
rithm (Set-
up Page) is
set to PID.
Instance 1
Map 1 Map 2
1890 2370
0x97 (151)
1
6
65 float
RWES
[`h;hy]
[ h.hy]
Loop (1)
Heat Hysteresis
Set the control
switching hysteresis
for on-off control. 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
-1,110.555 to
5,555.000°C
3.0°For
units
2.0°C
Heat Al-
gorithm
(Setup
Page) is set
to On-Off.
Instance 1
Map 1 Map 2
1900 2380
0x97 (151)
1
0xB (11)
66 float
RWES
[`C;Pb]
[ C.Pb]
Loop (1)
Cool Proportional
Band
Set the PID propor-
tional band for the
cool outputs.
0.001to9,999.000°F
or units
-1,110.555 to
5,555.000°C
25.0°F
or
units
14.0°C
Cool Algo-
rithm (Set-
up Page) is
set to PID.
Instance 1
Map 1 Map 2
1892 2370
0x97 (151)
1
7
67 float
RWES
[`C;hy]
[ C.hy]
Loop (1)
Cool Hysteresis
Set the control
switching hysteresis
for on-off control. 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
-1,110.555 to
5,555.000°C
3.0°For
units
2.0°C
Cool Al-
gorithm
(Setup
Page) is set
to On-Off.
Instance 1
Map 1 Map 2
1902 2382
0x97 (151)
1
0xC (12)
68 float
RWES
[``ti]
[ ti]
Loop (1)
Time Integral
Set the PID integral
for the outputs.
0 to 9,999 seconds per
repeat
180.0
seconds
per re-
peat
Heat Al-
gorithm or
Cool Algo-
rithm (Set-
up Page) is
set to PID.
Instance 1
Map 1 Map 2
1894 2374
0x97 (151)
1
8
69 float
RWES
[``td]
[ td]
Loop (1)
Time Derivative
Set the PID deriva-
tive time for the out-
puts.
0 to 9,999 seconds 0.0
seconds
Heat Al-
gorithm or
Cool Algo-
rithm (Set-
up Page) is
set to PID.
Instance 1
Map 1 Map 2
1896 2376
0x97 (151)
1
9
70 float
RWES
Note:
Some values will be rounded off to fit in the four-character display. Full values can be read with
other inter- faces.
* Available with PM4, PM8 and PM9 models only
R: Read
W: Write
E: EEPROM
S: User
Set