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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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Specific query about Mitsubishi inverter - experts only.
I've got a Mitsubishi FR-S500 inverter (actual model FR-S520S) that I
want to use to control the speed of my milling machine (metal content bit). I've jury-rigged it to use the setting dial to control the motor speed and its working fine. I can control the speed from barely moving, right up to twice normal speed. I've wired up a remote switch to start, stop and reverse the motor as shown in section 1.7.1 of the detailed instruction manual [IB(NA)-0600027] under the heading "Two-wire type connection (STF, STR)", but it doesn't work. Connecting SD to STF or STR has no apparent effect at all. I've tried it in PU and EXT mode, and still nothing. The only parameters changed from the factory settings shown in the manual are... P1 100 P7 0.5 P8 0.5 P30 1 P53 1 Can anyone help please? -- Regards, Gary Wooding (To reply by email, change feet to foot in my address) |
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"Wooding" wrote in message ... | I've got a Mitsubishi FR-S500 inverter (actual model FR-S520S) that I | want to use to control the speed of my milling machine (metal content | bit). I've jury-rigged it to use the setting dial to control the motor | speed and its working fine. I can control the speed from barely moving, | right up to twice normal speed. | | I've wired up a remote switch to start, stop and reverse the motor as | shown in section 1.7.1 of the detailed instruction manual | [IB(NA)-0600027] under the heading "Two-wire type connection (STF, | STR)", but it doesn't work. Connecting SD to STF or STR has no apparent | effect at all. I've tried it in PU and EXT mode, and still nothing. Not a specific answer, but many inverters require shielded wire to the controls. I won an argument with my boss one time 'cuz he thought he could get away with twisted pair. It actually worked until you turned everything else in the area on, though, giving him that false sense of confidence and me a little doubt. |
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"Wooding" wrote in message ... I've got a Mitsubishi FR-S500 inverter (actual model FR-S520S) that I want to use to control the speed of my milling machine (metal content bit). I've jury-rigged it to use the setting dial to control the motor speed and its working fine. I can control the speed from barely moving, right up to twice normal speed. I've wired up a remote switch to start, stop and reverse the motor as shown in section 1.7.1 of the detailed instruction manual [IB(NA)-0600027] under the heading "Two-wire type connection (STF, STR)", but it doesn't work. Connecting SD to STF or STR has no apparent effect at all. I've tried it in PU and EXT mode, and still nothing. The only parameters changed from the factory settings shown in the manual are... P1 100 P7 0.5 P8 0.5 P30 1 P53 1 Can anyone help please? -- Regards, Gary Wooding Read through the manual explaining the parameter settings. Check any that are relevant. Chances are something else has to be changed. There is always a parameter for the type of control, is that correct? Sometimes jumpers are also required. |
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I am not familiar with this particular inverter but I have programmed a few
of a different brand. Maybe you need to tell it to take commands from the terminal strip. the ones I program have such a parameter. Hope this helps Larry "Wooding" wrote in message ... I've got a Mitsubishi FR-S500 inverter (actual model FR-S520S) that I want to use to control the speed of my milling machine (metal content bit). I've jury-rigged it to use the setting dial to control the motor speed and its working fine. I can control the speed from barely moving, right up to twice normal speed. I've wired up a remote switch to start, stop and reverse the motor as shown in section 1.7.1 of the detailed instruction manual [IB(NA)-0600027] under the heading "Two-wire type connection (STF, STR)", but it doesn't work. Connecting SD to STF or STR has no apparent effect at all. I've tried it in PU and EXT mode, and still nothing. The only parameters changed from the factory settings shown in the manual are... P1 100 P7 0.5 P8 0.5 P30 1 P53 1 Can anyone help please? -- Regards, Gary Wooding (To reply by email, change feet to foot in my address) |
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Wooding wrote:
I've got a Mitsubishi FR-S500 inverter (actual model FR-S520S) that I want to use to control the speed of my milling machine (metal content bit). I've jury-rigged it to use the setting dial to control the motor speed and its working fine. I can control the speed from barely moving, right up to twice normal speed. I've wired up a remote switch to start, stop and reverse the motor as shown in section 1.7.1 of the detailed instruction manual [IB(NA)-0600027] under the heading "Two-wire type connection (STF, STR)", but it doesn't work. Connecting SD to STF or STR has no apparent effect at all. I've tried it in PU and EXT mode, and still nothing. The only parameters changed from the factory settings shown in the manual are... P1 100 P7 0.5 P8 0.5 P30 1 P53 1 Can anyone help please? Thanks to those who responded. The problem is now solved. Although the manual was quite explicit about the size of the flat-bladed screwdriver needed to tighten the terminals, it was particularly coy about what terminals to connect. The wiring diagram shows SD as the common input, but hidden away in another section of the manual is the important note that SD is only the common input when using SINK logic. Here in UK it is wired to use source logic and the common input is changed to PC. With P79 set to 3 and PC as the common input it now works fine. Ned was quite right - "The Mitsubishi drives are very good, but the docs are awful." -- Regards, Gary Wooding (To reply by email, change feet to foot in my address) |
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