Created Date: September 30,2016

Created By: Ian Charles

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Hi Guys: I'm struggling with the following. I 've successfully connected my P2000 to a Yaskawa V1000 using implicit messaging over Ethernet/IP. It uses two bytes to control the speed, so if I want to set a frequency of 60.00Hz, I convert this to hex i.e 0x1770 and, using the CPD instruction write the high byte of 0x17 or 23 to the first address in the output block and the low byte of 0x70 or 112 to the second. So far, so good. My application though is to control the inlet pressure on a filter which is broadly proportional to pump speed and, where the pump-motor is controlled from this VFD. My thinking is that this would be a good application for PID control but, I can't figure out how to do it. While I 've only got one process variable (pressure) I 've got two process outputs in the low byte and high byte of the V1000 output block. I'm sure I'm missing something really obvious - is there a way of doing this? Thanks in advance!