KEYENCE LK-CC100/DN100 - Manual (Page 55)

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3 Connecting to DeviceNet
Programming a control input
Create the ladder program as follows.
1 Check the status.
• Verify the SYSTEM_ERR_FLAG is OFF and READY_FLAG is ON.
• To request a program change, verify CHG_PRG_ENBLE is ON.
• Verify ***_ACQ is OFF.
2
Set the control parameter.
To request a program change, store the program number in SET_PRG_NUM.
3 Send the control input request.
Change the request signal to control ***_REQ from OFF  ON.
The request is sent to the LK-DN100 at the rising edge of ***_REQ.
4
Check the control input status.
When the LK-DN100 receives the control input and completes the execution
requested, ***_ACQ turns ON.
When ***_ACQ turns ON, verify ***_ERR and make sure the request was processed
normally.
5 Check the control input result.
• For a program change request, wait for CUR_PRG_NUM to change.
• For a control request that causes ***_STATE to change, wait for ***_STATE to
change.
• For all other requests, wait for input response time (T2).
Refer to the LK-G5000 series User's Manual for details on input response time (T2).
6 Disable the control input request.
Disable the control input request by changing ***_REQ from ON
 OFF.
7 Store the counter value.
Store the current counter value (COUNTER_LO and COUNTER_HI).
8 Check for counter value updates.
Wait until the current counter value, stored in Step 7, changes.
9 Acquire data.
Acquire the required data.
Reference