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157
Connecting More Than One HFU
Section 5-2
2.
Make the PLC settings.
Referring to item
2. Make the PLC settings.
on page 119, set the maximum
unit number to one less than the number of connected HFU units. Other
settings are the same.
■
Example
If three HFUs are connected, set the maximum unit number to 2.
3.
Make the EJ1 settings.
Make the following setting in all HFUs that are connected.
Refer to
5-1-3 Detailed Settings
for information on data linked with the
PLC. Be sure that the areas of PLC memory used by the different HFUs do
not overlap.
RS-485
B(+)
A(
−
)
SYSMAC
CS/CJ-series PLC
RS-485
1
2
6
8
Shell
RDA
−
RDB+
SDA
−
SDB+
FG
The 2/4-wire switch is set
for a 2-wire connection.
B1
B2
B3
B4
B5
B6
B7
B8
B9
A1
A2
A3
A4
A5
A6
A7
A8
A9
EJ1N-HFU
@
-NFLK
B1
B2
B3
B4
B5
B6
B7
B8
B9
A1
A2
A3
A4
A5
A6
A7
A8
A9
B(+)
A(
−
)
EJ1N-HFU
@
-NFLK
Signal
Pin
No.
Shield
Variable type
Parameter name
Setting/Monitor values
F0/B0
Programless Communications Protocol
2: NT Link (1: N)
HFU No. 0
Upload area
HFU No. 0
Upload area
HFU No. 1
Upload area
PLC Memory
PLC Memory
HFU No. 1
Upload area
INCORRECT
CORRECT
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: ......