Hi,All
I can't express my opinion well in English.
You can't understanding, I am very worried about my write.
I'm communtcation between AB EWEB module ControlLogix 5000 and VME using socket programming Ethernet.
We were proposed 460byte data size every 25ms send and received.
VME to PLC successful.
but,PLC to VME failed.
PLC side configuration two Task scan.
one - Continuous - normal program
two - Period(25ms) - PLC<->VME Communication program.
PLC write MSG
writeMSG.EN
----|/|-------------------------------- writeMSG ----------------
but, This MSG not execute every 25ms. The same TON Timer.
reality check time execute 50ms.
socketWriteTimer.DN
----|/|----------------------------------- socketWriteTimer -----
Preset 25
Accum
socketWriteTimer.DN
----| |----------------------------------- writeMSG -------------
I'm guess scan time timing AB PLC SOTS(System Overhead Time Slice 10%) and writeMSG.EN reset or socketWriteTimer.DN.
I'm propose every 25ms data send.
Will you give me some advice?
I can't express my opinion well in English.
You can't understanding, I am very worried about my write.
I'm communtcation between AB EWEB module ControlLogix 5000 and VME using socket programming Ethernet.
We were proposed 460byte data size every 25ms send and received.
VME to PLC successful.
but,PLC to VME failed.
PLC side configuration two Task scan.
one - Continuous - normal program
two - Period(25ms) - PLC<->VME Communication program.
PLC write MSG
writeMSG.EN
----|/|-------------------------------- writeMSG ----------------
but, This MSG not execute every 25ms. The same TON Timer.
reality check time execute 50ms.
socketWriteTimer.DN
----|/|----------------------------------- socketWriteTimer -----
Preset 25
Accum
socketWriteTimer.DN
----| |----------------------------------- writeMSG -------------
I'm guess scan time timing AB PLC SOTS(System Overhead Time Slice 10%) and writeMSG.EN reset or socketWriteTimer.DN.
I'm propose every 25ms data send.
Will you give me some advice?