What This Chapter Contains - ABB ACS355 series User Manual

Fieldbus control with embedded fieldbus 313
13
Fieldbus control with
embedded fieldbus

What this chapter contains

The chapter describes how the drive can be controlled by external devices over a
communication network using embedded fieldbus.
System overview
The drive can be connected to an external control system through a fieldbus adapter
or embedded fieldbus. For the fieldbus adapter control, see chapter Fieldbus control
with fieldbus adapter on page 339.
The embedded fieldbus supports Modbus RTU protocol. Modbus is a serial,
asynchronous protocol. Transaction is half-duplex.
The embedded fieldbus can be connected with either EIA-485 (terminal X1 of the
optional FMBA-01 Modbus adapter connected to drive terminal X3) or RS-232
(control panel connector X2).
EIA-485 is designed for a multipoint application (a single master controlling one or
more slaves). RS-232 is designed for a point-to-point application (a single master
controlling one slave).
For more information on the FMBA-01 Modbus adapter module, see FMBA-01
Modbus adapter module user's manual (3AFE68586704 [English]).