Using Memobus (Modbus) Communications - YASKAWA VS mini J7 Series Instruction Manual

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
n35 = 0 (Initial setting): Operates only when Inverter is running
=1:

Using MEMOBUS (MODBUS) Communications

Serial communication is available with VS mini using programmable
controller (MEMOCON series) and MEMOBUS. In order to perform
serial communications, RS-485/422 interface card (optional) must be
installed.
Refer to MEMOBUS Instruction Manual (Manual No.: TOEZ-C736-
70.1) for details of communications.
MEMOBUS (MODBUS) Communications
MEMOBUS system is composed of a single master (PLC) and slaves (1
to 31 VS-mini 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 No., and the master specifies the number and conduct
signal communications. The slave receives the communication to carry
out designated functions and reply to the master.
MEMOCON Series
Example of RS-485
communication
(Continues operation for 1 minute after
Inverter is stopped.)
Operates with power ON
VS mini J7
VS mini J7
6. Programming Features
VS mini J7
83