Chapter 8 Communication Function
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Set the contents as follows.
Item
Setting contents
Station No.
Set a number between 0 to 31 (Don’ t assign no. 0 as broadcasting station lest it may be a cause for
mistaken operation)
Baud Rate
Set one from 1200, 2400, 4800, 9600, 19200, 38400, or 57600 bps.
Data Bit
Set 7 or 8.
ASCII mode: Set as 7 bits.
RTU mode: Set as 8 bits.
Parity Bit
Set as one of None, Even, or Odd.
Stop Bit
Set 1 or 2 bit(s).
When parity bit is set: Set as 1 bit.
When parity bit isn’ t set: Set as 2 bits.
Communication
Channel
RS232C Null Modem or RS422/485 : It’ s a communication channel for the communication,
using MK80S base unit’ s built-in communication and Cnet I/F module (G7L-CUEC).
RS232C Modem (Dedicated Line) : It’ s to be selected for the communication, using an
dedicated modem with Cnet I/F module (G7L-CUEB).
RS232C Dial Up Modem : It’ s to be selected for the general communication connecting
through the telephone line by dial up modem and Cnet I/F module (G7L-CUEB).
Footnote) Using Cnet I/F module (G7L-CUEB) supporting RS232C, RS232C dedicated or dial-up
modem communication can be done, but not through Cnet I/F module (G7L-CUEC)
supporting RS422/485.
Time out in Master
Mode
It’ s the time waiting a responding frame since the master MK80S base unit sends a request
frame.
The default value is 500ms.
It must be set in consideration of the max. periodical time for sending/receiving of the master
PLC.
If it’ s set smaller than the max. send/receive periodical time, it may cause communication
error.
Modbus Master/
Slave
If it is set as the master, it’ s the subject in the communication system. If it’ s set as the slave, it only
responds to the request frame of the master.
Transmission Mode
Select ASCII mode or RTU mode.
