Publication 900-UM007D-EN-E - January 2011
3-18
Configuration & Basic Operation
Figure 3.21 — Direct/Reverse Operation
For example, when the process value (PV) temperature is lower than the set
point (SP) temperature in a heating control system, the manipulated variable
(OUT1) increases (ON) by the difference between the PV and SP values.
Accordingly, this becomes reverse operation in a heating control system, or
alternatively, direct operation in a cooling control system.
Direct/reverse operation is set in the Direct/Reverse Operation parameter
(Initial Setting function group).
Note:
The Direct/Reverse Operation parameter default is reverse operation.
EXAMPLE
Operation Procedure
In this example, the Input Type, Temperature Unit, Direct/Reverse Operation,
and Control Period (HEAT) parameters will be monitored.
The setup of parameters is as follows:
Input Type =
5
: K thermocouple
Temperature Unit =
c
:
°
C
Direct/Reverse Operation =
or-r
: reverse operation
Control Period (HEAT) = 20 seconds
1.
Press the
O
key for at least 3 seconds to move from the Operation
function group to the Initial Setting function group.
High temperature
Manipulated variable (MV)
Direct operation
Low temperature
Set value (SP)
High temperature
Manipulated variable (MV)
Reverse operation
Low temperature Set value (SP)
100%
0%
100%
0%
Summary of Contents for Allen-Bradley 900-TC16
Page 1: ...USER MANUAL Bulletin 900 TC8 900 TC16 900 TC32 Series B Temperature Controllers...
Page 2: ...2...
Page 72: ...Publication 900 UM007D EN E January 2011 3 2 Configuration Basic Operation Figure 3 3 900 TC32...
Page 136: ...Publication 900 UM007D EN E January 2011 3 66 Configuration Basic Operation Notes...
Page 340: ...Publication 900 UM007D EN E January 2011 5 112 Parameter Functions Definitions Notes...
Page 350: ...Publication 900 UM007D EN E January 2011 6 10 Troubleshooting Error Indication Notes...
Page 406: ...Publication 900 UM007D EN E January 2011 D 8 Glossary Notes...
