6 Programming Features
141
Selecting Cooling Fan Operation
In order to increase the life of the cooling fan, the fan can be set to oper-
ate only when Inverter is running
n039 = 0 (Factory setting): Operates only when Inverter is running
(Continues operation for 1 minute after
Inverter is stopped.)
=1: Operates with power ON.
Using MEMOBUS (MODBUS) Communications
Serial communication is available with V7AZ using a programmable
controller (MEMOCON series) and MEMOBUS (MODBUS). Refer to
the MEMOBUS Instruction Manual (Manual No.: TOEZ-C736-70.1)
for details of communications.
MEMOBUS (MODBUS) Communications
The MEMOBUS system is composed of a single master (PLC) and
slaves (1 to 31 V7AZ units).
Communication between master and slave (serial communication) is
controlled according to the master program with the master initiating
communication and the slave responding.
The master sends a signal to one slave at a time. Each slave has a pre-
registered address number, and the master specifies the number and
conducts signal communications. The slave receives the communica-
tions to carry out designated functions and reply to the master.
OMRON PLC
V7AZ
Example of RS-485
communication
V7AZ V7AZ
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