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Selection of CPU for 18 NO. Sync Drives

Created by: Arif Ahmad at: 11/20/2009 10:28 AM (3 Replies)

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11/20/2009 10:28 AM	Rate (0)
Arif Ahmad Experienced Member Joined: 2/16/2009 Last visit: 7/13/2024 Posts: 40 Rating: (0)	Dear Member, i am facing problem in selection of CPU. This is a continous process application in which 18 conveyors used and every conveyor have its own Motor + VFD. In this application every conveyor run with Synchronism loop to each other. So i want to develope this application in EASY MOTION CONTROL Software. So i select these following hardware. 18 No. VFD (Micro Master 440) 18 No. Incremental Encoder with 3 Nos. Counter Module (FM250) 3 Nos. Analoge Output Module (SM322). But i am facing problem in selection of CPU. Please seggest me what type of Order No, i select which perofome 18 Nos, Synchronism Function Blcok (MC_GearIn FB 41) without any Scan Time Problem. Best Regards, Arif Ahmad
	Extreme Control Engineering
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11/20/2009 4:12 PM	Rate (0)
miami Platinum Expert Joined: 8/31/2005 Last visit: 8/20/2024 Posts: 2198 Rating: (328)	Hello, to answer you question we need to know how acurate you have to be or what cycle time you can accept. I willhelp if you describe a bit more what you want to to or what product you transport. And how many impulses does your encoders have and how fast they are turning. BTW: Why you select MM440? Did you think about using PROFIBUS to connect the Micromasters to the PLC?
	Last edited by: miami at: 11/20/2009 4:13 PM
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11/21/2009 5:53 AM	Rate (0)
Arif Ahmad Experienced Member Joined: 2/16/2009 Last visit: 7/13/2024 Posts: 40 Rating: (0)	miami Hello, to answer you question we need to know how acurate you have to be or what cycle time you can accept. I willhelp if you describe a bit more what you want to to or what product you transport. And how many impulses does your encoders have and how fast they are turning. BTW: Why you select MM440? Did you think about using PROFIBUS to connect the Micromasters to the PLC? Dear Miami, Thanks for your reply. I have required 50ms scan time in OB35 for all (18 Nos.) Synchronising Command. Basically in my application it have Eight (8) Blocks, every block contain one conveyor and one Cutter and each conveyor and blcok contatin its own Motors. So Product (Biscuits) transport through eight (8) block continously. In first Phase Conveyor transport the matrial in shape of Paste to the Rollers for adjusting the thickness of material after that Paste (material) transport to the Second conveyor and it feed to the knife where knife cutt the material and so on. These Conveyors, Cutters, and Rollers have its own Motros. Feed Back Encoder resoultion in 2500 Pulse/Revolution.
	Extreme Control Engineering
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11/24/2009 5:54 PM	Rate (0)
miami Platinum Expert Joined: 8/31/2005 Last visit: 8/20/2024 Posts: 2198 Rating: (328)	Hello, I suggest you take a closer look at a CPU 314 or better on a 315. I'm not shure, but I expect they are fast enough if there is not much else they have to do. If possible, you should use one of this innovated CPUs. ------------------------------ Please note the FM350-2 allowws max. 10 kHz per channel, with 2500 Puls/turn you can only go up to 4 turns per second or 240turns per minute. ----------------------------- Why you want to use MM440 and not a "smaler" one like MM430. ---------------------------- If you think about using PROFIBUS, you may use the 1COUNT module
	Last edited by: miami at: 11/24/2009 6:42 PM
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