Interfaces Description; 134 - WEG CFW08 Vector inverter User Manual

CFW-08 OPTIONS AND ACCESSORIES

8.19.2 Interfaces Description

8.19.2.1 RS-485

134

- IDENTIFICATION
network address;
inverter;
software version.
- CONTROL
general enabling/disabling;
enabling/disabling by ramp;
direction of rotation;
frequency/speed reference;
local/remote;
JOG;
error and fault RESET.
- STATUS RECOGNITION
ready;
Sub;
run;
local/remote;
error;
JOG;
direction of rotation.
- PARAMETER READING
- CHANGE OF PARAMETERS
Typical examples of network use:
PC (master) for the parametrization of one or several inverters at the
same time;
SDCD monitoring inverter variables;
PLC controlling the operation of one or more inverters in a industrial
process.
The physical connection between the inverters and the master is performed
according to one of the standards below:
a. RS-232 (point-to-point up to 10m);
b. RS-485 (multipoint, galavanic isolation, up to 1000m);
This interface permits the linkage of up to 30 inverters to a master (PC,
PLC, etc.), attributing and setting for each inverter an address (1 to 30). In
addition to these 30 addresses, there are two addresses to perform special
tasks:
Address 0: any inverter in the network is inquired, independently of its
address. Only one inverter can be connected to the network (point-to-
point) in order to prevent short-circuits in the line interface.