TimeFluxCap
Member
This thread started in a different post with a comms problem but as I believe it is not related and I have introduced a short term fix I am looking for some further info.
PV550 talking over a DH+ network to a SLC 5/04.
On the PV there is one Numeric Entry Object. Enter a number between 1 and 99 and the number is stored into a N7 file in the SLC. A Notification tag (B3 bit type) then is sent from the PV to the SLC. Once received a Handshake tag (B3 bit type) is sent from the SLC bag to the PV.
The notification and handshake are part of the PV software for those who have never seen it.
Handshake timeout time from advanced settings is set to 4 secs (default) Update frequency for the above tags is 1 (highest)
Once a number is entered into the object, most of the time there is no problem. However, every now and then an Error 308 - Timeout is set on the PV. Error 308 is failure to receive handshake bit. While monitoring the ladder code I believe this is happening because the Notification bit isnt making it from the PV to SLC therefore the Handshake bit will never come.
Knowledgebase and helpine exausted, has anyone else seen anything like this? I have taken the handshake time out to 8 seconds to see if this eliminates it for now but not ideal. I dont know how else to set notification bit as its a system bit from the PV internals.
PV550 talking over a DH+ network to a SLC 5/04.
On the PV there is one Numeric Entry Object. Enter a number between 1 and 99 and the number is stored into a N7 file in the SLC. A Notification tag (B3 bit type) then is sent from the PV to the SLC. Once received a Handshake tag (B3 bit type) is sent from the SLC bag to the PV.
The notification and handshake are part of the PV software for those who have never seen it.
Handshake timeout time from advanced settings is set to 4 secs (default) Update frequency for the above tags is 1 (highest)
Once a number is entered into the object, most of the time there is no problem. However, every now and then an Error 308 - Timeout is set on the PV. Error 308 is failure to receive handshake bit. While monitoring the ladder code I believe this is happening because the Notification bit isnt making it from the PV to SLC therefore the Handshake bit will never come.
Knowledgebase and helpine exausted, has anyone else seen anything like this? I have taken the handshake time out to 8 seconds to see if this eliminates it for now but not ideal. I dont know how else to set notification bit as its a system bit from the PV internals.
