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317T CPU, synchronization I/O update with Technology cycles

Created by: mhkocak at: 8/11/2009 11:13 AM (4 Replies)

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8/11/2009 11:13 AM	Rate (0)
mhkocak Advanced Member Joined: 1/8/2009 Last visit: 6/5/2024 Posts: 43 Rating: (0)	Hello, I am trying to preapre a configuration for an application. CPU is 317T, beacuse there are some servo axes. And there is an IM174 to connect an external encoder. Servo axes will be slaves of external encoder. And my program will generate some outputs using external encoders position information. Timing accuracy of outputs is important. The facts I know: ------------------------ - 317 T can have only 1 rack with 8 modules. So I need to add an IM153 via MPI/DP interface to increase I/O number. - OB65 is a cyclic interrupt, synchronous with Technology cycles. So I can add program parts for generating outputs from external encoders position information to OB65. - It is possible to add IM153-2 HF to DP-drive bus also. But 32 channel I/Os can not be used on this IM153 and these outputs can not be used as normal outputs also. - It is not possible to synchronize Profibus cycle (MPI/DP port) to Technology cycles or DP-drive cycles. -OB61 is synchronous with MPI/DP Profibus cycle. Handicap: -------------- How can I transfer outputs to physical world synchronously with Technology cycles. I mean synchronously with external encoders position information. - In OB 65 I can not update I/Os on IM153 connected to MPI/DP port synchronously, because OB65 is synchronous with DP-Drive cycle, but not with DP( not drive) cycle. - Is there a way to synchronize 2 Profibus cycles of the PLC? - Is there a way to update IM153 outputs synchronous with Technology cycles? Thanks.. mhkocak

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8/11/2009 7:09 PM	Rate (0)
miami Platinum Expert Joined: 8/31/2005 Last visit: 8/8/2025 Posts: 2198 Rating: (331)	Hello mhkocak, the technology CPU has two parts, the PLC part and the technology part. The left MPI/PROFIBUS connector is coltrolled by the PLC Part, the right PROFIBUS DP-DRIVE connector by the technology. It's not possible to synchronize them. Did you think about connecting your critical signal on the PB DP-DRIVE Bus? If you want to generate accurate signalsyou must gererate them in the technology part! mhkocak Servo axes will be slaves of external encoder. And my program will generate some outputs using external encoders position information. Timing accuracy of outputs is important. ... How can I transfer outputs to physical world synchronously with Technology cycles. I mean synchronously with external encoders position information. Use cam switches in the technology. Physicaly it can be a ET200 DO on the right PROFIBUS mhkocak It is possible to add IM153-2 HF to DP-drive bus also. But 32 channel I/Os can not be used on this IM153 and these outputs can not be used as normal outputs also. You can, there are FBs (e.g. MC_ReadPeriphery) allowing you to write/read signals on PROFIBUS stations connected to the right connector throught the technology into the PLC part.

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8/11/2009 8:24 PM	Rate (0)
mhkocak Advanced Member Joined: 1/8/2009 Last visit: 6/5/2024 Posts: 43 Rating: (0)	Hello miami, As you wrote, cam switches would be the right solution for time (or position ) critical outputs. But in my application There are some conditions for the outputs. Moreover, outputs will be forced on or off. Thanks. mhkocak

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8/12/2009 10:32 AM	Rate (0)
miami Platinum Expert Joined: 8/31/2005 Last visit: 8/8/2025 Posts: 2198 Rating: (331)	The FB430"MC_CamSwitch" has a mode connector: 1= allway off, 2= cam activ, 3= cam activ, inverted, 4= allway on Look here.Use the PFD file and look in chapters 3.9 and 6.5

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8/12/2009 4:11 PM	Rate (0)
mhkocak Advanced Member Joined: 1/8/2009 Last visit: 6/5/2024 Posts: 43 Rating: (0)	Thank you miami.. It will help me. mhkocak

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