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Everything posted by Seppo Alanen
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I have USB-RS232 (vivanco/Serial Twin-Tower modul) works fine with CJ1MCPU22 and HP omnibook xe4400/Win2000 Pro. It didn't work manually with conficured project, but i was earliyer testet that PLC with desktop COM1. I don't know what that test done to PLC settings. After then I selected PLC->Auto Online with correct COM2 and it found with correct PLC-type and everything. Prolific USB-to-Serial Bridge (COM2) have set earlier under Device manger under Computer manager under Adminstrative Tools (Under Control Panel).
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MPI is Multi Point Interface. In S7, MPI not use Profibus protocol? When using Profibus-DB for programming, it uses MPI-protocol inside the ProfibusDB protocol. ?? PPI is point to point Interface for RS232C ? So is it the same ? Could be ?
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Usually Counter-units are 'expencive'. If you don't have any need for fast counting, use digital Inputs and save your money.
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1'st draw the channels 'pulses' cahannel A above and Channel B under it as 90 deg offset. 2n'd go from left to right and when B goes up take one-shot for it. If Channel A is true, you are going to fwd. then go from right to left and when B goes up take one-shot for it. If Channel A is false, you are going to rev. Now you have one shot/pulse for both direction. Think more! You can do 2 shots/pulse and you can do 4 shots/pulse-cycle indeed for both direction. So if you have encoder f.e. 20 impulses/round, you can get 80 shots/round and you have 4 times preciser resolution !
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I dont know SCL, but in s7-manager you can do UDT-structs and use them in DBs as in C++. Key-Word is UDT. :*-(
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I try tell you more what I 'm hunting. What CX-Motion excatly do, when it downloads G-code to MC via PLC ? I like, that my VB-application can send G-code to MC via PLC.. with same cable-connection..
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I can produce G-code from Auto-Cad drawing file. After that translation I need download G-code to MC-421 for using. There is PC closely connected to CS1-plc for PLC-programming by CX-Programmer ect. and this translation VBasic-application is in the same PC. What can I do next for it ?
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L (thumweel-byte) L KM 0000 0000 00001111 UW or AW T (temp) L (thumweel-byte) L KM 0000 0000 11110000 UW or AW L KF +10 XF L (temp) +F T (integer)
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Key-word is ACS550 User manual and for PROFIBUS Adapter Module, Installation and Start-up Guide. For ACS400 only ?? I don't have exp. with ACS550 but ACS400 and NPBA-12 adapter. There have to build sequence for DB-connection 1'st were ware one timer ! After that you can read/write Peripherial words for DB-Node directly without any FC-routine by anybody.
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Trigging via RS232C could be impossible. It is not supported by the Sick, so you must trig by Digital Output-relay/opto.
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Generally, if symbol is missing, draw something and write 'VFD' or 'Pressure Switch' or what ever ! Main thing is suppress missunderstanding.
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System do it for you: starttime = S:4, ellapsed time = S:4 - starttime ? Use as many varible as needed for S:4 regisry contents, I don't know it.
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Maybe... some day... MicroSoft buy them all..
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Opinion only ! For SQL database use VB or C++ applications with OLE-DB ActiveX controls and OPC-Server for PLC. Use SCADA for animations and control with any PLC.