Message Format - Omron VARISPEED V7 User Manual

Constant
n153 MEMOBUS Slave
Address
n154 MEMOBUS BPS
Selection
n155 MEMOBUS Parity
Selection
n156 Transmission
Waiting Time
n157 RTS Control
* The slave does not respond to the command from the master when set to 0.
Monitoring run status from the PLC, setting/referencing of constants,
Fault Reset and multi-function input reference can be done regardless of
Run Command or frequency reference selection.
Multi-function input reference from the PLC becomes OR with input
commands from S1 to S7 multi-function input terminals.

Message Format

For communications, the master (PLC) sends a
command to the slave (V7AZ) and the slave re-
sponds to it. The configuration for sending and re-
ceiving is as shown to the right. The length of the
data varies according to the contents of commands
(functions).
The interval between messages must be main-
tained at the following amount.
PLC - V7AZ
Reference Message
24 bits
• Slave address: Inverter address (0 to 32)
144
Name
Setting range: 0 to 32*
0: 2400 bps
1: 4800 bps
2: 9600 bps
3: 19200 bps
0: Even parity
1: Odd parity
2: No parity
Setting range: 10 ms to 65 ms
Setting unit: 1 ms
0: RTS control
1: No RTS control (RS-422A: 1-to-1 communication)
V7AZ - PLC
Response Message
n156 setting
Setting to 0 indicates simultaneous broadcasting. The
Inverter does not respond to the command from the mas-
ter.
Description
PLC - V7AZ
Reference Message
10 ms or more
24 bits
Factory
Setting
0
2
2
10 ms
0
Slave address
Function code
Data
Error check
t (s)