RV3.0

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  1. Thank you for your reply. In short, one can see that the variables that is being applied in the setup range - that variables such as the multiplication factors, e.g, is required to correspond to that of the real-time variables being read (current, voltage, etc). This is the case since there are various layers with their accommodating factor value. The correct multiplication factor is required to instantaneously correspond to that of the applicable real-time set of variables.  It can therefore be seen that it would be ideal if it would be possible to scan the set of variables in one-go and synchronized. 
  2. Please assist me with the following; regarding the ME96SSHA-MB Power meter data transition with Melsec-Q series PLC; We acquire to read various values on dedicated Modbus storage address registers at the simultaneous into a Melsec-Q series PLC via Modbus (TCP or RTU)  for calculation purposes. Naturally, since the reading of these variables are to provide accurate instantaneous results, it is a requirement that these values are to be read at one scan.   However, as can be seen below, there is a gap in address register range – of which, if all of these are scanned simultaneously, yields an exception error when read. This error is only avoided by scanning these data sets separately – which is not ideal for our application – since accuracy in calculations is imperative.
  3. Please assist me with the following; regarding the ME96SSHA-MB Power meter data transition with Melsec-Q series PLC; We acquire to read various values on dedicated Modbus storage address registers at the simultaneous into a Melsec-Q series PLC via Modbus (TCP or RTU)  for calculation purposes. Naturally, since the reading of these variables are to provide accurate instantaneous results, it is a requirement that these values are to be read at one scan.   However, as can be seen below, there is a gap in address register range – of which, if all of these are scanned simultaneously, yields an exception error when read. This error is only avoided by scanning these data sets separately – which is not ideal for our application – since accuracy in calculations is imperative.
  4. We have Q06UDEHCPU PLC.   We require to attain 1k of file registers in standard Ram. Please find our settings attached - PLC Parameter.png; When we try to down the register file – we attain the following error; “Failed to access standard Ram” error message (attached - Downloading Error.png); The program is very small – and thus we have plenty of space as well.
  5. Thank you for the reply Gambit. Thing is, the table above is attained via a program comparison. The table on the left shows the code as is on GX developer. The table on the right shows the code as is found on the CPU. The additional Z values are not being added by the user, as can be seen by the left table.  
  6. Profibus Function Blocks for Q2ASCPU for Melsec ST Lite RIO inter-connection. Please assist in advising the attainment of such blocks - if any existing. Thanks
  7. FR-DU04 (FR-A500) vs FR-DU04-1 (FR-V500). Programming unit differences. (A VSD question) What is the difference between these units? Why are they not interchangeable. (Other than the fact that the FR-DU04-1 is used for vector VSD applications, and the FR-DU04 is intended for standard induction motor applications. Is this a matter of firmware differences?
  8. Good day  I require some assistance with the configuration setup (GX Works 3) for FX5u PLC inter-communication (PLC to PLC), over Ethernet (using the built-in Ethernet port). The purpose of the inter-connection is data exchange. (Values stored within the PLC storage registers such as words and bits).  Does anyone perhaps support files on this such as a procedure or example? Thanks