Watlow F4T • 232 • Chapter 6 Appendix
Parameter Class
and Name
Range Default
Data Type and
Attributes
Modbus Registers
Control Mode Active
"Off (62)
Auto (10)
Manual (54)"
"unsigned 16-bit
Access = R"
"Cascade Loop 1: 4012
Cascade Loop n:
4012+((n-1)* 200)"
Control Action
"Off (62)
Cool (20)
Heat (36)
Both (13)"
Heat (36)
"unsigned 16-bit
Access = RW"
"Cascade Loop 1: 4014
Cascade Loop n:
4014+((n-1)* 200)"
Autotune
Aggressiveness
"Under (99)
Critical (21)
Over (69)"
Critical (21)
"unsigned 16-bit
Access = RW"
"Cascade Loop 1: 4016
Cascade Loop n:
4016+((n-1)* 200)"
Autotune Set Point 50 To 200% 90.0
"IEEE Float
Access=RW"
"Cascade Loop 1: 4018
Cascade Loop n:
4018+((n-1)* 200)"
Autotune
"No (59)
Yes (106)"
No (59)
"unsigned 16-bit
Access = RW"
"Cascade Loop 1: 4020
Cascade Loop n:
4020+((n-1)* 200)"
Autotune Status
"Off (62)
Waiting For Cross 1+
(119)
Waiting For Cross 1-
(120)
Waiting For Cross 2+
(121)
Waiting For Cross 2-
(122)
Waiting For Cross 3+
(123)
Waiting For Cross 3-
(150)
Measuring Max Peak
(151)
Measuring Min Peak
(152)
Calculating (153)
Complete (18)
Timeout (118)"
"unsigned 16-bit
Access = R"
"Cascade Loop 1: 4022
Cascade Loop n:
4022+((n-1)* 200)"
Open Loop Detect
Enable
"No (59)
Yes (106)"
No (59)
"unsigned 16-bit
Access = RW"
"Cascade Loop 1: 4024
Cascade Loop n:
4024+((n-1)* 200)"
Open Loop Detect
Time
0 To 9999 240
"unsigned 16-bit
Access=RW"
"Cascade Loop 1: 4026
Cascade Loop n:
4026+((n-1)* 200)"
Open Loop Detect
Deviation
-99,999.000 to 99,999.000°F
or units, -55,555.000 to
55,555.000°C
10.0
"IEEE Float
Access=RW"
"Cascade Loop 1: 4028
Cascade Loop n:
4028+((n-1)* 200)"
Control Loop Error
"None (61)
Open Loop (1274)
Reversed Loop (1275)"
"unsigned 16-bit
Access = R"
"Cascade Loop 1: 4030
Cascade Loop n:
4030+((n-1)* 200)"
Clear Error
"Clear (129)
Ignore (204)"
Ignore (204)
"unsigned 16-bit
Access = RW"
"Cascade Loop 1: 4032
Cascade Loop n:
4032+((n-1)* 200)"
Minimum Set Point
-99,999.000 to 99,999.000°F
or units, -55,572.778 to
55,537.222°C
-99,999.000°F or
units, -55,572.8°C
"IEEE Float
Access=RW"
"Cascade Loop 1: 4034
Cascade Loop n:
4034+((n-1)* 200)"
Maximum Set Point
-99,999.000 to 99,999.000°F
or units, -55,572.778 to
55,537.222°C
99,999.000°F or units,
55,537.2°C
"IEEE Float
Access=RW"
"Cascade Loop 1: 4036
Cascade Loop n:
4036+((n-1)* 200)"