6 Parameter Settings and Functions
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6.6 Communication settings
This feature is used for external higher systems (PC, GP, etc.) to set the controller's parameters
and to monitor the controller. It can also be used to transmit data to external devices.
No redundant unit addresses may exist along the same communication line. The communication
cable must be a twist pair that supports RS485.
Interface
Standards EIA RS485-compliant
Max. Connections 31 units (Addresses: 01 through 99)
Communication Two-wire, half duplex
Synchronization Asynchronous
Valid Communication
Distance
Max. 800 m
BPS (bits per second) 2400, 4800, 9600, 19200, 38400 bps
Response Standby 5 ms to 99 ms
Communication Start Bit 1 bit (fixed)
Data Bit 8 bit (fixed)
Communication Parity Bit None, Even, Odd
Communication Stop Bit 1, 2 bit
Protocol Modbus Remote Terminal Unit (Character = 11 bit as fixed)
You could modify the parameter (first in, first out) using keys during communication connection,
but this may lead to errors and malfunctions.
6.6.1 Unit address settings [PAR4 → ADRS]
You can assign individual addresses to data units.
Parameter Setting range
Unit
PAR4 ADRS 01 to 99
01 -
6.6.2 BPS (bits per second) settings [PAR4 → BPS]
You can set the rate of data transmission.
Parameter Setting range
Unit
PAR4
BPS
24(2400 bps) / 48(4800 bps) / 96(9600
bps) / 192(19200 bps) / 384(38400 bps)
96 bps