101
Programless Communications
Section 5-6
4.
Check operation.
Turn OFF the power to the EJ1G and PLC and then turn the power back
ON. It does not matter which one is turned ON first. Refer to the following
information and check the operation.
Basic Operations
■
Monitoring EJ1G Set Values
Use the following procedure to confirm that the channel 1 and channel 2 pro-
cess values can be read.
1,2,3...
1.
Set the Read Request Bits allocated in PLC memory (D500) to 2.
2.
Confirm that the Read Response Bits (D0) are set to 2.
3.
Confirm that D4 and D5 are set to the channel 1 and channel 2 process
values.
The EJ1G set value will be continuously read if D500 is set to 2. Set D500
to 0 to stop reading the set value.
■
Changing EJ1G Set Values
Use the following procedure to confirm that the channel 1 and channel 2 set
points change.
1,2,3...
1.
Set D504 and D505 in PLC memory to 100.
2.
Set the Setting Change Request Bits (D501) to 1.
3.
Set the Setting Change Response Bits (D1) to 1.
4.
Use the EST2-2C-MV3 CX-Thermo Support Software to confirm that the
EJ1G channel 1 and channel 2 set points have changed to 100. To check
operation again, set D501 to 0 and once D1 has changed to 0 repeat the
procedure from step 1.
Data register Value
Meaning
Procedure step number and confirmation item
D0
2
Read Response Bits
Step 2: Set to 2 by the system.
D1
0
Setting Change Response Bits
D2
0
Operation Command Response Bits
D3
*
Communications Status
D4
Step 3 Channel 1 Process Value
Step 3: Set to channel 1 process value by the system.
D5
Step 3 Channel 2 Process Value
Step 3: Set to channel 2 process value by the system.
D500
2
Read Request Bits
Step 1: Set from PLC user program.
D501
0
Setting Change Request Bits
Data register Value
Meaning
Procedure step number and confirmation item
D0
0
Read Response Bits
D1
1
Setting Change Response Bits
Step 3: Set to 1.
D500
0
Read Request Bits
D501
1
Setting Change Request Bits
Step 2: Set from PLC user program.
D502
0
Operation Command Request Bits
D503
0
Operation Command Code
D504
100
Channel 1 Set Point
Step 1: Set from PLC user program.
D505
100
Channel 2 Set Point
Step 1: Set from PLC user program.
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: ......