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125
Programless Communications
Section 5-1
■
If Not Operating Correctly
Check the following items if the operation is incorrect.
• Are the wiring and settings correct?
• Was the power turned OFF once the EJ1 and PLC settings had been
completed? (The EJ1 settings are enabled only after the EJ1 is reset.)
• The Programless Communications Receive Wait Time may be too short.
Refer to
Adjusting Communications Time with PLC
on page 134 and
change to a longer wait time.
Checking Operation
with the MELSEC-An/
AnS/FX3UC Series
This section describes how to check operation for the configuration shown
below.
1,2,3...
1.
Connect the EJ1 and PLC.
Connect the EJ1N-HFU and Computer Link Unit as shown in the following
diagram.
D1503
0
Operation Command Code
D1504
100
Channel 1 Set Point
Step 1: Set from PLC user program.
D1505
100
Channel 2 Set Point
Step 1: Set from PLC user program.
Data register Value
Meaning
Procedure step number and confirmation item
V1.1
MELSEC-An/AnS/FX3UC-series PLC
EJ1
HFU
EDU
TC
RS-232C/485/422
Unit
No. 0
Unit
No. 1
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: ......