Hello, I am seeking assistance with reconfiguring the communication settings for my Mettler Toledo IND780 scale connected to a SLC5/04 PLC with a 1747-sn RIO Scanner card. The A-B RIO, PLC Data Format, and PLC Message slots need to be adjusted. If anyone is experienced with this equipment, your guidance would be greatly appreciated. Both communication lights on the 1747 and AB-RIO are displaying solid Green. The 1747-sn is located in slot 1 of the PLC with the following setup: - Scanned input words: 32 - Scanned output words: 32 - ISR #: 0 - M0/M1 Length: 3300 - G file Length: 3 - G file Config: Group 0, Full rack The information needed for the IND780 includes: - A-B RIO: - Node address: (octal/decimal) - Start Quarter: (1-4) - Last Rack: (enable/disable) - Data Rate: 57.6kB - Block Transfer: (enable/disable) - PLC Data Format: Integer, Float, Division, Template, Application (float) - Byte order: historical, word swap, byte swap - PLC Message slots: to address the issue at hand I have experimented with various configurations but have not been successful in viewing data in the input module. The only way I have been able to transmit data from the scale is by utilizing a template and selecting a shared data value. Mettler Toledo representatives mentioned that setting up floating point correctly should automatically send data from the scale. Within the output module of the PLC, a byte changes every 6 seconds with values of 10, 11, 12, and then clears. These values likely correspond to gross weight, net weight, and tare weight.
Hello there! Has this issue been resolved yet? I'm asking because I'm currently experiencing the same problem.
I managed to resolve the issue by adjusting the communication configuration in the Ind780. Although it's been some time, if you are experiencing the same issue, I may be able to assist you with it.
I'm struggling to locate AB RIO cards for the 780 series, as they appear to have been discontinued and are no longer available for purchase. Can anyone advise me on where I can find these essential cards? I need them to last until we are able to upgrade all units next year.
From your problem description, it seems that the PLC and the scale are not communicating properly, despite what seems to be a correct RIO and PLC configuration. The situation suggests that there might be an issue with the data type interpretation in your PLC. The Mettler Toledo IND780 scale possibly sends floating point data, which means your PLC data format should be set to ‘float’. Furthermore, given the fluctuation of byte values, they indeed could correspond to gross weight, net weight, and tare weight. This would be the case typically in serial communication with scales. If you haven't already, I'd suggest to check thoroughly the byte order setting, which could also be causing incorrect data interpretation. Confirm that it's set according to the scale's documentation (likely historical or maybe byte swap for scale communication). It may require a bit of trial and error but your setup seems on the right track.
I see what you're going through and it can indeed be a bit complicated setting up the IND780 to communicate with your SLC5/04 PLC. I've had a similar experience in my own setup. Firstly, ensure that your control structure in the PLC is correctly defined to accept the particular data format you want to use. I believe the Mettler Toledo manual should provide examples of how to define this structure. Secondly, double-check your Node addresses to ensure they are correct and they aren't shared by any other device on your communications network. This can cause conflicts leading to issues with successful data transfer. Finally, when it comes to float values, remember that you are consulting FLOATINT in the PLC data table and not INTINT. I have noticed that many people overlook this, leading to confusion when the decimal value doesn't appear as expected. You should also consider contacting Mettler Toledo's support team, they may offer specific advice for your setup.
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Answer: Answer: To configure the communication settings, you need to adjust the A-B RIO settings (including Node address, Start Quarter, Last Rack, Data Rate, and Block Transfer), PLC Data Format (Integer, Float, Division, Template, Application), Byte order (historical, word swap, byte swap), and PLC Message slots as per the specific requirements.
Answer: Answer: If you are unable to view data in the input module, consider setting up the floating point correctly as suggested by Mettler Toledo representatives. They mentioned that configuring the floating point correctly should automatically send data from the scale. Additionally, check the output module of the PLC for any changes in bytes that may correspond to different weight values.
Answer: Answer: To ensure successful communication, verify that the A-B RIO settings, PLC Data Format, and PLC Message slots are correctly configured according to the requirements of the equipment. Also, monitor the communication lights on
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