106
Other Functions (TC4 and TC2)
Section 4-7
4-7-3
Internal Buses (TC4 and TC2)
The EJ1 has three built-in buses. I/O can be allocated to these buses, so sim-
ple sequences can be created by assigning signals that are output to the bus
(Bus Output Assignments) and assigning functions that operate according to
bus signals (Bus Input Assignments).
Note
(1) Bus inputs cannot be used if a Basic Unit is used without an HFU.
Even if an HFU is used, bus inputs cannot be used for Basic Units con-
nected to the RS-485 communications lines using distributed positioning.
(2) BUS1 and BUS2 are connected to SUB1 and SUB2 on the EDU.
(3) HFU and TC2 event inputs and auxiliary outputs can be linked.
(4) Signals output to the bus can also be read at the outputting Unit itself.
Bus I/O Assignments
The following diagrams show the parameters that can be set in the Bus Input
1 to 3 Assignment and Bus Output 1 to 3 Assignment parameters. Refer to the
Example
on page 108, when setting parameters.
The settable parameters include those for all channels and those for individual
channels.
Note
(1) Bus inputs cannot be used if a Basic Unit is used without an HFU.
Even if an HFU is used, Bus Input cannot be used for TC Units connected
to the RS-485 communications lines using distributed positioning.
(2) Set the bus settings correctly in each Unit so that there are no conflicts in
operation within the EJ1 system.
CPU
CPU
CPU
BUS1
BUS2
BUS3
SUB1
SUB2
EV
SUB
HFU
TC2
TC4
EDU
Set using bus input assignments.
Set using bus output assignments.
Set using auxiliary output assignments.
Set using bus output assignments.
Summary of Contents for EJ1 EtherCAT
Page 2: ...EJ1 Modular Temperature Controllers User s Manual Revised July 2008 ...
Page 3: ...iv ...
Page 19: ...xx ...
Page 213: ...188 Detailed Description of Services Section 6 4 ...
Page 227: ...202 Detailed Description of Services Section 7 5 ...
Page 303: ...278 Index ...
Page 305: ......