Heat/Cool Output Types - ABB COMMANDER 351 User Manual

2.6 Heat/Cool Output Types

2.6.1 Reverse (Heat)/Direct (Cool) or Direct (Heat)/Reverse (Cool)
The active output, either OP1 (Heat) or OP2 (Cool) is displayed and may be adjusted in manual
mode. The OP1 and OP2 l.e.d.s indicate which output is changing.
–100%
0%
Fig. 2.5 Typical Response – Reverse/Direct or Direct/Reverse Control Action
50
OP1
-50
OP2
OP2 (cool)
Y2.St
•1
Output Positive (Heat Output Active)
Heat Output
[0 to 100% (0 to 110% in manual mode with analog
outputs)]. Adjustable in manual mode only.
•2
Output Negative (Cool Output Active)
Cool Output
[–100 to 0% (–110 to 0% in manual mode with
analog outputs)]. Adjustable in manual mode only.
2 OPERATOR LEVEL...
+100%
OP1 (heat)
PID O/P
Y1.St
100%
19