Hi all,
I have a client asking for some advice about installing an IND570 weigher and having Citect read out of it directly using the Modbus TCP option card, bypassing any PLC's.
The problem is that the manual explicitly specifies the data be read out by a PLC and I can see that the reason is the weigher comms aren't exactly the most straightforward.
Basically the way I understand it is that each scale only has a single Modbus float register dedicated to weigher readings. The Modbus master needs to write command words to trigger dynamic population of said register with the desired reading (gross, net, etc.). The intention seems to be that PLC logic be written to cyclically read out different weights out of the one register.
Fortunately, the client only really wants net weight readings which seems simple enough because that will only require the same command each read. So my theory is to make a dummy Citect tag with a statically defined command word and feed that to the IND570. On paper, this should allow Citect to constantly read out net weight from the IND570. Can anyone with experience with this setup let me know if this will work or if I'm on a fool's errand?
Thanks
I have a client asking for some advice about installing an IND570 weigher and having Citect read out of it directly using the Modbus TCP option card, bypassing any PLC's.
The problem is that the manual explicitly specifies the data be read out by a PLC and I can see that the reason is the weigher comms aren't exactly the most straightforward.
Basically the way I understand it is that each scale only has a single Modbus float register dedicated to weigher readings. The Modbus master needs to write command words to trigger dynamic population of said register with the desired reading (gross, net, etc.). The intention seems to be that PLC logic be written to cyclically read out different weights out of the one register.
Fortunately, the client only really wants net weight readings which seems simple enough because that will only require the same command each read. So my theory is to make a dummy Citect tag with a statically defined command word and feed that to the IND570. On paper, this should allow Citect to constantly read out net weight from the IND570. Can anyone with experience with this setup let me know if this will work or if I'm on a fool's errand?
Thanks