Omron E5AC, Communications Manual

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6 Programless Communications
6 - 8
E5@C Digital Temperature Controllers Communications Manual (H175)
Always assign communications unit numbers in order starting from 0. Do not skip any numbers. Com-
munications unit number 0 is for the master. The recommended communications baud rate is 19.2 for a
Mitsubishi FX1 or FX2 PLC, 38.4 for a Mitsubishi FX3 PLC, and 57.6 for any other PLC. Set the same
communications baud rate for all of the E5
@
C Controllers and the PLC. (Setting the PLC is required
only for programless communications.)
Communications Setting Level
Display condition: None
This is the time that the E5
@
C will wait from the time that it receives a response from the PLC (or, for
component communications, from an E5
@
C slave) until it sends the next command. We recommend a
send data wait time setting of 1. Increase the set value of this parameter if the command is sent too
soon to allow the PLC (or, for component communications, the E5
@
C slave) to receive it.
Communications Setting Level
Display condition: None
Set the Highest Communications Unit No. parameter to the highest communications unit number that is
actually set on the connected E5
@
C Controllers.
Make sure that setting of the Highest Communications Unit No. parameter agrees with the unit num-
bers of the E5
@
C Controllers that are actually connected.
6-2-2 Communications Unit No. and Communications Baud Rate
Parameter name Displayed characters Setting range Default
Communications Unit
No.
u-no
0: Master
1 to 31: Slaves 1
Communications Baud
Rate
bps
9.6: 9600bps
19.2: 19200bps
38.4: 38400bps
57.6: 57600bps 9.6
6-2-3 Send Data Wait Time
Parameter name Displayed characters Setting range Default
Send Data Wait Time
sdwt
0 to 99 ms 20 ms
6-2-4 Highest Communications Unit No.
25
0
C
25
0
C
25
0
C
E5CC
No.0
E5CC
No.1
E5CC
No.2
25
0
C
PLC
The highest communica-
tions unit number is 2.
Set the communications
unit numbers starting
from 0.