C Ontrol Signal Logic In Hvac A Pplication - Honeywell NXL Series Applications Manual

5
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5. Control signal logic in HVAC Application
Pres et speed 1
DIN3
Preset speed 2
Exp.DIE1
Exp.DIE3
2.2.21 Fieldbus Ctrl Reference
2.2.20 Keypad Crtl Reference
2.1.14 I/O Reference
Up
DIN2 Motor
Down
DIN3 potentiometer
2.9.2 PID reference
AI1
AI2
P3.5 PID keypad refer.
Reference from
fieldbus
(FBProcessData IN 1)
R3.2 Keypad reference
Reference from fieldbus
Start/Stop from fieldbus
Direction from fieldbus
Start forward
DIN1
DIN2
Start reverse
(programmable)
Fault reset input (programmable)
Exp. DIE2
Figure 1- 38. Control signal logic of the HVAC Application
4
Control signal logic in HVAC Application
> 1
Disable PID
0
1
2
PID
3
0
1
2
I/O ref
2.1.14
3
4
0
1
2
K
3
4
5
0
1
2
3
F
4
5
Programmable
Start/Stop and
Reverse logic
3.3 Keypad direction
DIN3 & Exp.DIE1 2.1.2 Max. frequency
DIN3
2.1.20 Preset speed 1
Exp.DIE1 2.1.21 Preset speed 2
Enable PID keypad ref. 2 (DIN#=12)
R3.6 PID keypad ref. 2
Actual value
input, par. 2.9.3
P2.9.1 PID activation
3.1 Control place
Internal
I/O
frequency ref.
Keypad
Fieldbus
Reset button
Start/Stop buttons
Internal Start/Stop
Internal reverse
Internal fault reset
>1
Honeywell
PID
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