Using Communications; Setting Communications Parameters - Omron E5AR-T User Manual

5.10 Using Communications

■ Setting Communications Parameters

Communications parameters are set in the Communications Setting Level. The parameters and settings
are listed in the following table.
Display Parameter
psel
Protocol Selection
u-no
Communications Unit No.
bps
Communications Speed
len
Communications Data Length
sbit
Communications Stop Bit
prty
Communications Parity
sbwt
Transmission Wait Time
● Parameter
Descriptions
Set values
cwf
/mod
0, 1 to 99
9.6 /19.2/38.4
7 /8 (bit)
1/ 2
none/
even
/odd
0 to to 99
20
* Default settings are highlighted.
Protocol Selection (psel)
The communications protocol can be set to CompoWay/F
(OMRON'S unified protocol for general-purpose serial communica-
tions), or Modbus (based on RTU Mode of Modbus Protocol (specifi-
cations: PI-MBUS-300 Rev.I) of Modicon Inc.).
Communications Unit No. (u-no)
When performing communications with a host computer, a unit
number must be set for each Controller to allow the host computer
to recognize it. Any number from 0 to 99 can be set. The unit
number is set to 1 by default. When using multiple Controllers, make
sure that no Controllers have the same unit number or communica-
tions will not take place correctly. After setting a unit number, turn
OFF the power and then turn it ON again to enable the new unit
number.
Communications Speed (bps)
Set the baud rate for communications with a host computer. The
following speeds are possible:
9.6 (9,600 bit/s), 19.2 (19,200 bit/s), or 38.4 (38,400 bit/s)
After setting the baud rate, turn OFF the power and then turn it ON
again to enable the new baud rate.
Communications Data Length (len)
The communications data length can be set to 7 bits or 8 bits.
Communications Stop Bit (sbit)
The number of communications stop bits can be set to 1 or 2 bits.
Communications Parity (prty)
The communications parity can be set to none (none), even (even),
or odd (odd).
Transmission Wait Time (sbwt)
After changing the transmission wait time, perform a software reset
or turn the power OFF and then ON to enable the new setting.

5.10 Using Communications

Description
CompoWay/F or Modbus
0 to 99
9.6, 19.2, or 38.4 (kbits/s)
7/8 (bits)
1/2 (bits)
None, even, or odd
0 to 99 (ms)
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