Watlow Controls
3
EHG CL User’s Guide
Display
Parameter Name & Description
Range
Default
Modbus
Relative
Address
Data Type
& Read/
Write
[HyS]
[HyS]
On-Off Hysteresis
Set the how far below the set point
the temperature can drop before the
heater turns on.
3 to 28°C (5 to 50°F)
3°C (6°F)
41
unsigned
integer
RWE
[`Pb]
[ Pb]
Proportional Band
Set the proportional band in tempera-
ture units.
0 to 68°C (0 to 122°F)
0°C or 0°F
37
signed in-
teger
RWE
[Int]
[Int]
Integral
Set the integral value in minutes per
repeat.
0 to 999
0
38
signed in-
teger
RWE
[dEu]
[dEv]
Derivative
Set the derivative value in minutes.
0 to 999
0
39
signed in-
teger
RWE
[`Ct]
[ Ct]
Cycle Time
Set the cycle time in seconds.
5 to 60
10
40
unsigned
integer
RWE
[Abt]
[Abt]
Ambient Temperature
View the ambient temperature.
0 to 106°C (0 to 190°F)
43°C (77°F)
24
unsigned
integer
R
[Adr]
[Adr]
Modbus Device Address
View and or change the present Mod-
bus address.
1 to 247
1
15
unsigned
integer
RWE
[bAU]
[bAU]
Modbus Baud Rate
Select the communication speed.
[`96]
9,600 (15)
[192]
19,200 (16)
[384]
38,400 (17)
9,600
16
unsigned
integer
RWE
[tU`]
[tU ]
Temperature Units
Select the temperature scale.
[``F]
°F (4)
[``C]
°C (5)
°C
17
unsigned
integer
RWE
[rpp]
[rPP]
Restore Programmed Parameters
Restore factory default settings.
[yes]
Yes
[`no]
No
No
- - - -
- - - -
[bru]
[brv]
Base Release Version
View the controller’s base release
version.
0 to 9999
- - - -
48
unsigned
integer
R
[bPu]
[bPv]
Base Prototype Version
View the controller’s base prototype
version.
0 to 9999
- - - -
49
unsigned
integer
R
[bbu]
[bbu]
Base Build Version
View the controller’s base build num-
ber.
0 to 9999
- - - -
50
unsigned
integer
R
[dru]
[drv]
Display Release Version
View the interface’s release version.
0 to 9999
- - - -
11
unsigned
integer
R
[dPu]
[dPv]
Display Prototype Version
View the interface’s prototype ver-
sion.
0 to 9999
- - - -
12
unsigned
integer
R
[dbu]
[dbv]
Display Build Version
View the interface’s build number.
0 to 9999
- - - -
13
unsigned
integer
R
Note:
All values above 999 will be rounded off to fit in the three-character display. Full values can be
read with other interfaces.
Note:
The EHG CL does not support Modbus function code 16 (0x10) Write Multiple Registers. Pa-
rameter values must be written individually with function code 6 (0x06) Write Single Registers.
R: Read
W: Write
E: EEPROM
