ABB ACH550-01 User Manual page 15

ACH550 User's Manual
6. Booster pump ........................................................ 98
7. Pump alternation.................................................. 100
8. Internal timer ........................................................ 102
9. Internal timer with constant speeds / Powered
roof ventilator ........................................................... 104
10. Floating point ..................................................... 106
11. Dual setpoint PID ............................................... 108
12. Dual setpoint PID with constant speeds ............ 110
13. E-bypass (USA only) ......................................... 112
14. Hand control ...................................................... 114
Connection example of a two-wire sensor ............... 116
6. Real-time clock and timed functions..................... 117
What this chapter contains ...................................... 117
Real-time clock and timed functions ........................ 117
Using the timer......................................................... 118
1. Enabling the timer ................................................ 120
2. Setting the time period ......................................... 121
3. Creating a timer ................................................... 122
4. Connecting parameters ....................................... 124
Example of timer use ............................................... 125
7. Serial communications ........................................... 129
What this chapter contains ...................................... 129
System overview...................................................... 130
Mechanical and electrical installation of the plug-in
fieldbus .................................................................... 132
Setting up communication through a plug-in
fieldbus adapter (EXT FBA) module ........................ 134
Drive control parameters ......................................... 136
Fieldbus control interface......................................... 146
Generic Drive Profile................................................ 160
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