User`s manual

Watlow EZ-ZONE™ Communications • 60 • Chapter 6 Operations Page
Parameter name
Description
Modbus
(less
40,001
offset)
read/
write
CIP
class
instance
attribute
read/
write
Range Default Data
Type
EZ-ZONE™
PM Int.*
EZ-ZONE™
PM PID*
EZ-ZONE™
PM Limt*
Loop
Autotune Request
Start an autotune. While autotune is ac-
tive, the Home Page will display [Attn]
[tUn1] . When the autotune is complete,
the message will clear automatically.
1920
r/w
151
1
21 r/w
No (59)
Yes (106)
No
integer X X
Loop
Closed Loop Set Point
Set the set point that the controller will au-
tomatically control to.
2160
r/w
107
1
1 r/w
Low Set Point to High Set
Point (Setup Page)
75.0
floating
point
XX
Loop
Idle Set Point
Set a set point that can be triggered by an
event state.
2176
r/w
107
1
9 r/w
Low Set Point to High Set
Point (Setup Page)
75.0
floating
point
XX
Loop
Heat Proportional Band
Set the proportional band for the heat outputs.
1890
r/w
151
1
6 r/w
0.001 to 9,999.000°F or units
0.001 to 5,555.000°C
25.0°F or
units
14.0°C
floating
point
XX
Loop
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.
1900
r/w
151
1
11 r/w
0.001 to 9,999.000°F or units
0.001 to 5,555.000°C
3.0°F or
units
2.0°C
floating
point
XX
Loop
Cool Proportional Band
Set the proportional band for the cool outputs.
1892
r/w
151
1
7 r/w
0.001 to 9,999.000°F or units
0.001 to 5,555.000°C
25.0°F or
units
14.0°C
floating
point
XX
Loop
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.
1902
r/w
151
1
12 r/w
0.001 to 9,999.000°F or units
0.001 to 5,555.000°C
3.0°F or
units
2.0°C
floating
point
XX
Loop
Time Integral
Set the PID integral for the outputs.
1894
r/w
151
1
8 r/w
0.0 to 9,999.000 seconds per
repeat
180.0 sec-
onds per
repeat
floating
point
XX
Loop
Time Derivative
Set the PID derivative time for the outputs.
1896
r/w
151
1
9 r/w
0.0 to 9,999.000 seconds 0.0
seconds
floating
point
XX
Loop
Dead Band
Set the offset to the proportional band. With
a negative value, both heating and cooling
outputs are active when the process value
is near the set point. A positive value keeps
heating and cooling outputs from fighting
each other.
1898
r/w
151
1
10 r/w
-1,000.0 to 1,000.0 0.0
floating
point
XX
Loop
Open-Loop Set Point
Set a fixed level of output power when in
manual (open-loop) mode.
2162
r/w
107
1
2 r/w
-100 to 100% (heat and cool)
0 to 100% (heat only)
-100 to 0% (cool only)
0.0
floating
point
XX
Integers are unsigned, 16-bit values. Floating point values are IEEE 754 32-bit floating point values.
The default Modbus order is Low Word-High Word. The order can be changed in the Communications Menu.
The default serial data format is: 9,600 baud; 8 data bits; no parity; 1 stop bit.
NOTE: Avoid continuous writes within loops. Excessive writes to the EEPROM will cause premature EEPROM failure. The EEPROM is
rated for 1,000,000 writes.
Underlined parameters are not accessable using a remote user's interface (RUI) or the controller's front panel. They can only be ac-
cessed using communications.
*Some of the parameters are not functional in some configurations of each model. Check the user's manual for information.
Int.
PID
Lmt.