98
Programless Communications
Section 5-6
■
If Not Operating Correctly
Check the following items if the operation is incorrect.
• Are the wiring and settings correct?
• Was the power cycled once the EJ1G and PLC settings were completed?
(The EJ1G settings are enabled only after the EJ1G is reset.)
Checking Operation
with MELSEC-Q/
QnAS Series
This section describes how to check operation for the configuration shown
below.
1,2,3...
1.
Connect the EJ1G and PLC.
Connect the EJ1G-HFU and Serial Communications Unit as shown in the
following diagram.
DM Area Value
Meaning
Procedure step number and confirmation item
D00000
0000
Read Response Bits
D00001
0001
Setting Change Response Bits
Step 3: Set to 0001 by the system.
D00500
0000
Read Request Bits
D00501
0001
Setting Change Request Bits
Step 2: Set from PLC user program.
D00502
0000
Operation Command Request Bits
D00503
0000
Operation Command Code
D00504
0064
Channel 1 Set Point
Step 1: Set from PLC user program.
D00505
0064
Channel 2 Set Point
Step 1: Set from PLC user program.
MELSEC-Q/QnAS Series
EJ1G
HFU
EDU
TC
Unit
No. 0
RS-232C
CH1
Unit
No. 1
Summary of Contents for EJ1G
Page 3: ...iv ...
Page 17: ...xviii ...
Page 21: ...xxii ...
Page 53: ...32 Unit Configuration Examples Section 2 4 ...
Page 69: ...48 Changing SPs During Operation Section 3 3 ...
Page 81: ...60 Other Functions Section 4 5 ...
Page 145: ...124 Other HFU Functions Section 5 7 ...
Page 167: ...146 Detailed Description of Services Section 6 4 ...
Page 229: ...208 Parameters That Can Be Allocated for Programless Communications Appendix ...
Page 237: ......