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Showing results for tags 'indirect'.
Hi everyone. I tried to use a MODBUS configuration using an indirect declaration of SLAVE ID, but didn't work. (see example in index 2 and 3 below) If I declare the SLAVE ID in a direct way, all OK. My problem is that I have to read several slaves from the PLC, and is realy hard to do with a fixed Modbus configuration. I am using a V130 in revision 9.6.0. Thanks in advance. Regards, Javier. P.D.: Sorry if I posted this twice. I couldn't find the first post.
Hi all, I'm brand new to the Unitronics Vision line after about 6 years on AB ControlLogix and PLC5, so pardon what might be some "noob" questions. I couldn't find my answers after a forum search and maybe I am overlooking something in the documentation. I'm used to the relative ease of being able to indirectly address mostly anything from my PLC5 days, and I'm trying to figure out the best way to perform some similar operations in a Vision 130. I need to loop through a routine that will control 12 valves. I'm going to utilize an MI register as my loop pointer / index and loop through with a Jump / Label. I've decided to store configuration bits and buffer the valve commands into a series of MIs so that I can indirectly access a particular bit. I really have 2 questions: 1) I'd like to indirectly address the output bit for the actual valve using a register (MI) that contains my valve commands. MI 400 is my valve pointer. MI 402 is my output pointer MI:401 is my register for valve 1. Bit 0 is my output bit. Other bits in the register will correspond to other status indicators (NO / NC, Valve failure, etc...) Here is an example of how would have coded it in "Allen-Bradley parlance" using the vision naming convention. What would the equivalent be with Vision? I have a feeling it may be the Numeric to Bit vector instruction? So in this example, MI 400 = 401, and MI 402 = 1 MI [MI 400]/0 O[MI 402] ---| |---------------( ) 2) Is it possible to indirectly address a timer? I have some timers associated with each valve and I cannot find a way to start a timer indirectly. I'd like to avoid copy and pasting 12 times over. It's not too much work to directly address them but it will look nicer and fit within the loop. Thanks!