GE AF-600 FP Operating Instructions Manual page 71

How to Operate the Frequenc...
5 5
Operation Keys for local control are found at the bottom
of the keypad.
[Hand]
enables control of the frequency converter via the keypad.
[Hand] also starts the motor, and it is now possible to
enter the motor speed data by means of the arrow keys.
The key can be selected as Enable [1] or Disable [0] via
K-40 [Hand] Button on Keypad.
The following control signals will still be active when
[Hand] is activated:
•
[Hand] - [Off] - [Auto]
•
Reset
•
Coasting stop inverse
•
Reversing
•
Set-up select lsb - Set-up select msb
•
Stop command from serial communication
•
Quick stop
•
DC brake
NOTE
External stop signals activated by means of control signals
or a serial bus will override a "start" command via the
keypad.
70
AF-600 FP High Power Operating Instructions
[Off]
stops the connected motor. The key can be selected as
Enable [1] or Disable [0] via K-41 [Off] Button on Keypad. If
no external stop function is selected and the [Off] key is
inactive the motor can only be stopped by disconnecting
the mains supply.
[Auto]
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 K-42 [Auto] Button
on Keypad.
NOTE
An active HAND-OFF-AUTO signal via the digital inputs has
higher priority than the control keys [Hand] – [Auto].
[Reset]
is used for resetting the frequency converter after an alarm
(trip). It can be selected as Enable [1] or Disable [0] via
K-43 [Reset] Button on Keypad.
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 parallel 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.