Danfoss ADAP-KOOL AKD 102 - 5.1.3 RS-485 bus connection; 5.1.4 How to connect a PC to the frequency converter

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[Auto on]

enables the frequency converter to be controlled via the control terminals and/or serial communication. When a start signal is applied on the control

terminals and/or the bus, the frequency converter will start. The key can be selected as Enable [1] or Disable [0] via par. 0-42

[Auto on] Key on LCP

NB!

An active HAND-OFF-AUTO signal via the digital inputs has higher priority than the control keys [Hand on] – [Auto on].

[Reset]

is used for resetting the frequency converter after an alarm (trip). It can be selected as

Enable

[1] or

Disable

[0] via par. 0-43

[Reset] Key on LCP

The parameter shortcut can be carried out by holding down the [Main Menu] key for 3 seconds. The parameter shortcut allows direct access to any

parameter.

5.1.3 RS-485 bus connection

One or more frequency converters can be connected to a controller (or

master) using the RS-485 standard interface. Terminal 68 is connected

to the P signal (TX+, RX+), while terminal 69 is connected to the N signal

(TX-,RX-).

If more than one frequency converter is connected to a master, use par-

allel connections.

Illustration 5.1: Connection example.

In order to avoid potential equalizing currents in the screen, earth the cable screen via terminal 61, which is connected to the frame via an RC-link.

Bus termination

The RS-485 bus must be terminated by a resistor network at both ends. If the drive is the first or the last device in the RS-485 loop, set the switch S801

on the control card for ON.

For more information, see the paragraph

Switches S201, S202, and S801

5.1.4 How to connect a PC to the frequency converter

To control or program the frequency converter from a PC, install the PC-based Configuration Tool MCT 10.

The PC is connected via a standard (host/device) USB cable, or via the RS-485 interface as shown in the ADAP-KOOL Drive AKD 102