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About SHY

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  1. What you said is what I thought should be done but not done due to some constraints.
  2. The shield connections on the signal side are not shown in my drawing but they are right ie terminated on one side only to ground. Internally the card 24VAC ground and the signal commons are common (tested for continuity before) so everything on the card (commons) should be ground referenced as well right? Yes, the output component is a 3 wire device with 0-10VDC signal and 24VAC powered. My neutral is referenced to ground based on my above statement, isn't it? Correct me if I am wrong.
  3. Thanks for the information.
  4. thanks for the reply steve!! sorry, my mistake. the transformer is not halfwave rectified (forget that statement in the drawing). the controller which the analog output (both cards) resides is the one internally halfwave rectified. I would think still ok to parallel the power supply isn't it? thus my using AC setting to test the circuit. the wiring in the cabinet was not so tidy and difficult to trace the cables. i got funny readings (cannot really recall what but something like ¬50 VAC and 120VAC) when testing some points. I was suspecting my measuring between 230VAC, 24VAC or the 10VDC points. Thus my questions like expected voltage readings between: 1. 230VAC (L) and 24 VAC (L) 2. 24VAC and 10VDC (using Vac setting on multimeter) thanks again.
  5. hi dan, trust me, it isn't a homework. it's something i encountered at work and need some consultation before i really go touch anything. anyway, as u can see, in my post, i hv put in some of my thoughts but some i really have no idea. measured some silly voltage previously but couldn't make sense of it. tracing the live wires were a bit of a hassle. i now hv no access to the site but its eating at me. something i jsut need to know for future reference. thanks.
  6. Hi All, pls help with some questions i have. do refer to attach drawing and i repeat my questions below: 1. Any problem with connection electrically (apart from funny wiring connection)? 2. If the 24VAC (+) from transformer 1 and 24VAC (+) from transformer 2 is jumpered, will there be a problem? If so, what? Doesn’t look like there’s problem with like short circuit or signalling problem for me though 3. What would be the voltage between the 24VAC(+) of the 2 transformers? I think ~0VAC, correct me if I am wrong. 4. What would the voltage reading be if using a multimter set at VAC between 24VAC (+) and the analog output (when signal is 10VDC out). Please help out with calculation if possible. 5. What would the voltage reading be if using a multimeter set at VAC between 24VAC (+) and the analog output (when signal is 0 VDC out). Note AC and DC measured with AC setting 6. What would happen if accidental shorting of the 24VAC (+) to the analog outout signal terminal? 7. What would happen if accidental shorting of the 24VAC (N) to the analog outout signal terminal? I think the analog output terminal will blow or internal card fuse blow, correct me if I am wrong. 8. What is the voltage reading between 230VAC (L) and 24VAC (L)? Am sure it is 206VAC but my fundamentals need reassuring!! Thank you in advance. Visio-Drawing1.pdf
  7. micrologix 1200 programmer cable?

    thanks all. thought all i need was the 1761-cbl-pm02 cable as didn't see it being mentioned in any AB manual as yet (requirement for null modem adaptor). since we are at it, does anyone know what the ends of the 1761-cbl-pm02 is? understand that its rs232and mini din but is it male or female type at each end? cannot see/understand from the pinout pictures provided in the AB manual. thanks again.
  8. micrologix 1200 programmer cable?

    just figured, should be ok since both requires same type of cable ie 1761-cbl-pm02 (serial 9 pin d shell - connection to pc/panelview to 8 pin mini DIN - for connection to micrologix). correct me if I am wrong pls... confirmation appreciated.
  9. would like to know if the cable used by a connecting panelview (AB600) to a micrologix thru channel 0 directly can be used to connect the micrologix with a PC directly for programming. thanks.
  10. Hi! Hope somebody here can help me. I am trying to install RSView on my Windows XP Pro (Service pack 2). However after entering serial number and selecting components to install, I get this popup message: Your existing system path is too long. Please modify your path using control panel-system dialog-environment tab before running setup again. Existing path length is: 426 characters Setup needs to add: 29 characters Maximum NT path length: 256 characters Setup will exit now I have tried going into the environment tab but do not know how to make the necessary modification. No hints on how to proceed. Cannot see the Existing path length size and such other info. Hope somebody can help me. Thanks in advance. Regards, SHY
  11. SLC505 with 1747SDN

    Hi! I've seen an equipment with a SLC505 and a 1747SDN card installed. This card has 2 devices connected to it (namely omron ee5k). I am keen to have an overview of how this software is configured. Read somewhere that I might need a RSNetworx. Does it mean that I need RSNetworx on top of RSLogix? Or is RSLogix sufficient for all the configuration and software development? Need an overview of how to configure these devices as I've been serving the net and trying to read on the manuals but still have problem understanding (guess one of the problem part is I have problem understanding the block transfer concept). Does each device need a specific address (and this address automatically configured when we use RSNetworx)? Thank you and hoping for a favourable reply.
  12. SFC Examples

    Thanx to you all.
  13. Anybody got example of codes with description of how SFC implementated? Keen to learn SFC via examples as couldn't find much anywhere in the net. Tells you how but does not give examples mostly.