CS/CJ multitasking

[ParaffinPower 13]

Hi all. Couple of queries. (from CXProg help) This I didn't know. If I have 5 cyclic programs, they get processed together? When does the I/O get refreshed? One more thing, I can't seem to declare a program as "Power on"... Any ideas? Thanks, guys Pp

[Nibroc 4]

... Have a read of the programming W394 manual section 4 on tasks. The PLC does not 'multi task', it scans cyclic tasks sequentially (by task number), and jumps to execute interrupt tasks as they occur. You can make the 'Peripheral Processing' run in parallel to help optimise communications etc. Also see operation manual W393 section 10 (CPU operation) IO Refresh occurs after the last cyclic task. Nibroc Edited 5 Sep 2006 by Nibroc

[ParaffinPower 13]

Hi Nibroc That's as I thought it happens, it's just when I stumbled across the "true multitasking" line in the CxProg help that got me wondering. Thanks for the reply

[Guest anonymous]

Hello ParaffinPower, Power On tasks are available for the CV /CVM Series PLCs. Regards anonymous

[Nibroc 4]

You can turn tasks on and off using the ladder functions TKON, TKOFF. Why not just turn the task on for the 'first scan' ?? nibroc