Rockwell Automation 900-TC32 Digital Temperature Controllers, Series B - Manual (Page 160)

Publication 900-UM007D-EN-E - January 2011
4-24 Parameter Adjustments & Application Considerations
Control by Inverting Direct/Reverse Operation
When DRS (Invert Direct/Reverse Operation) is set for the Event Input
Assignment 1 or Event Input Assignment 2 parameter and the Direct/Reverse
Operation parameter is set for reverse operation, control starts with direct
operation (cooling control) when event input 1 or 2 turns ON and control
starts with reverse operation (heating control) when the event input turns
OFF.
Switching 100% AT Execute/Cancel
When AT-2 (100% AT Execute/Cancel) is set for either the Event Input
Assignment 1 or Event Input Assignment 2 parameter, 100% AT will be
executed when event input 1 or 2 turns ON and will be cancelled when the
input turns OFF.
Table 4.M
Setting Input Contact Program Status
Event Input 1 or 2 OFF reset
Event Input 1 or 2 ON Start
Table 4.N
Setting
Input
Contact Direct/Reverse
Operation Parameter
Status
Event
Input 1 or
2 OFF Direct operation (cooling) Direct operation (cooling)
Reverse operation
(heating) Reverse operation (heating)
Event
Input 1 or
2 ON Direct operation (cooling) Reverse operation (heating)
Reverse operation
(heating) Direct operation (cooling)
Table 4.O
Setting Input Contact Status
Event input 1 or 2 OFF 100% AT cancelled
Event input 1 0r 2 ON 100% AT executed