Specifications

Bulletin No. VVDED397044US R12/00 Section 2—Modbus Plus Overview

December 2000 Local and Remote

Local and Remote

The ATV58 drive controller can be commanded in local and remote

control modes.

Local Control

In local (hand) control, the drive controller is controlled by either:

• Operators such as push buttons, switches, and a speed potentiometer

that are wired to the drive controller terminal block

• The keypad display buttons

See the latest revision of the keypad display manual VVDED397047US

for more details on how to select between the two modes of local control.

Remote Control

In remote (auto) control:

• The drive controller is controlled by the serial communication network.

• The speed reference and the start/stop control cannot come from

separate sources.

Forced Local

Switching between local and remote control is achieved by a switch wired

to a logic input on the controller terminal block as illustrated in Figure 28

on page 52 and Figure 29 above. The logic input must be assigned to the

function, forced local.

When the logic input assigned to forced local is active (high), all control

of the drive controller is assigned to the selected local (hand) control

mode. In this case, command requests by the network are refused.

Command parameters can be monitored. All other parameters can be

read/write accessed.