7/31/2017 11:52 AM | |
Posts: 2 Rating: (0) |
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Last edited by: Jen_Moderator at: 7/31/2017 1:19:19 PMNew subject after splitting |
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7/31/2017 1:55 PM | |
Joined: 9/27/2006 Last visit: 9/25/2024 Posts: 12283 Rating: (2685) |
Hello stretch; The Micromaster Vector inverters did not have a Modbus RTU interface, if I recall; the only possibility for remote operation was through USS protocol. See the contents of the following document: http://www.vfds.com/manuals/siemens-micromaster-vector-manual.pdf 5.6 Local and Remote Control The inverter can be controlled either locally (default), or remotely via a USS data line connected to the internal interface terminals (24 and 25) or to the RS485 D-type connector on the front panel. (Refer to parameter P910 in section 6 for the available remote control options.) When local control is used, the inverter can only be controlled via the front panel or the control terminals. Control commands, setpoints or parameter changes received via the RS485 interface have no effect. For remote control, the serial interface is designed as a 2-wire connection for bi-directional data transmission. Refer to parameter P910 in section 6 for the available remote control options. … P910 Local / USS mode 0 - 4 [0] Sets the inverter for local control or USS control over the serial link:
Note: When operating the inverter via USS control (P910 = 1 or 2 ), the analogue input remains active when P006 = 1 and is added to the setpoint. Here are some examples of the USS protocol with a S7-1200 (it is also available on the S7-200 PLCs, through a licensed library): TIA Portal Tutorial #10: Control USS-capable Drives - YouTubeS7 1200 Communication with micromaster 420 using USS Protocol Hope this helps, Daniel Chartier |
Last edited by: dchartier at: 7/31/2017 2:43:37 PM |
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