Delta DVPDNET-SL Operation Manual page 26

DeviceNet Network Scanner DVPDNET-SL
When M1 is On, DVPDNET-SL only sends out the request message once. To send out the request

message again, you will have to change the value of ReqID.
If the writing is successful, the message back from the target equipment will be stored in D6000 ~

D6003.
22 DVP-PLC Operation Manual