Omron E5AC, Communications Manual

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7 Component Communications
7 - 2
E5@C Digital Temperature Controllers Communications Manual (H175)
7-1 Component Communications
You can use component communications to connect two or more E5
@
C Controllers via RS-485 and
then change the set points or RUN/STOP status for all of the Controllers at the same time. If you
change the set point or RUN/STOP status of the master (i.e., the Controller with a communications unit
number of 0), the set points or RUN/STOP status of all of the slaves (i.e., the Controllers with communi-
cations unit numbers other than 0) that are connected via RS-485 will change automatically. When you
change the set points, the set point from the master can be multiplied by a factor or offset at each slave.
You can also copy the parameter settings in the master to the slaves.
Note: To use component communications, the input type and, if an analog input is used, the decimal point position
must be set to the same values for all of the E5
@
C Controllers. The operation will not work correctly if the
position of the decimal point is different.
Wire the E5
@
C Controllers as shown below.
E5CC/EC/AC
7-1-1 Introduction
7-1-2 Wiring
25
0
C
25
0
C
25
0
C
0: Master 1: Slave
Up to 32 Controllers
n: Slave
RUN RUN
25
0
C
25
0
C
25
0
C
0: Master 1: Slave n: Slave
SP=90 SP=120
The set point of each
slave can be calculated.
Set point of master
changed to 100.
All slaves from 1 to n are
automatically changed in
order to RUN status. Master changed to
RUN status.
13
14
No.0 No.1 No.2
B(+)
A(
−
)
13
14
B(+)
A(
−
)
13
14
B(+)
A(
−
)
No.n
13
14
B(+)
A(
−
)
120
Ω
(1/2 W)
terminating resistance
120
Ω
(1/2 W)
terminating resistance