Omron EJ1 User Manual page 167

Programless Communications
Setting Changes
PLC
Address
m+0
m+1
m+2
m+3
m+4
PLC
Address
m+0
m+1
m+2
m+3
m+4
142
■ Checking Programless Communications Operation from the PLC
To confirm that programless communications are working from the PLC, con-
firm that reserved bit 15 of the Communications Status under the Programless
Upload Settings is changing. Bit 15 repeatedly turns ON/OFF during commu-
nications. Bit 15 alternates between ON and OFF, changing at each program-
less communications.
Example: Multi Read
Each time all the parameters set under Programless Upload Settings are
written to the PLC, bit 15 changes between ON and OFF.
To change EJ1 settings from the PLC, first change the values in the Download
Area in the PLC memory and then set the Setting Change Request Bits.
The EJ1 will then read the Download Area in the PLC memory and change
the corresponding settings.
• Single Action
All of the parameters set in the Download Area are written.
4. The EJ1 sets the Setting
Change Response Bits.
Upload Area
Value Address
Read Response
n+0
Bits
0001 n+1
Operation Command
n+2
Response Bits
Communications
n+3
Status
Monitor Value n+4
1. Set value is changed by
the PLC.
Upload Area
Value Address
Read Response
n+0
Bits
n+1
0000
Operation Command
n+2
Response Bits
Communications
n+3
Status
n+4
Monitor Value
6. The EJ1 clears the Setting
Change Response Bits.
Download Area
Value
Read Request Bits
0001
Operation Command
Request Bits
2. The Setting Change Request
Operation
Command Code
yyyy
3. The EJ1 reads the
set value.
Download Area
5. The Setting Change Request
Value
Read Request Bits
0000
Operation Command
Request Bits
Operation
Command Code
yyyy
Section 5-1
EJ1
HFU TC4/2
Bits are set by the PLC.
yyyy
Bits are cleared by the PLC.
yyyy