Task

[Jhops123]

Hi,

I am completely new to mitsubishi PLCs, I have a beckhoff back ground.

I have to familiarise myself with Gx works 2 for a project in the new year, I have some sample programs that I am trying to understand.

The program I am looking at (I cant post NDA) has 5 tasks with a bunch of POUs in each task. When you hover over a task it pops up with attributes like always,event...

Could anyone point me in the direction of some documentation that explains how tasks work and how to set theses attributes? I tried looking at some manual but cant find any description of this.

 

Many thanks

[AndreasW]

Hi Jhops123,

have a look at

Q-Series Basic & Advanced Course (for GXWorks2):

https://eu3a.mitsubishielectric.com/fa/en/dl/12449/SH(NA)-081123ENG-A.pdf
https://eu3a.mitsubishielectric.com/fa/en/dl/12448/SH(NA)-081124ENG-A.pdf

the task settings are descibed in chapter "6.2 Program execution management"  of the Advanced Course (second link)

you should also have a look at GXWorks2 Operating manual

https://eu3a.mitsubishielectric.com/fa/en/dl/9541/sh080779.pdf

regarding your question about the tasks:

- Initial Programs will be executed once after startup
- Scan Programs are the default and will be cyclic executed
- Fixed Interval Programs are similar to Scan Programs, but use a fixed cycle time,
  that can be set in the Program Settings; Fixed Interval Programs are only executed
  when Interrupts are enabled (with the 'EI' Instruction) from within   another 'Scan' or 'Init' Program
- No Execution Type programs won't be executed, usefull to temporary disable a program
- Wait Programs: programs that are executed on request (e.g sub-routines, interrupts, events)

hope this helps

[Jhops123]

Hi Andreas, thanks for the reply much appreciated! I will have a read of those manuals.

[Jhops123]

Hi Andreas, thanks for the reply much appreciated! I will have a read of those manuals.

[glavanov]

This link is your friend: https://www.mitsubishielectric.com/fa/assist/e-learning/eng.html