11/18/2020 12:12 AM | |
Joined: 9/27/2006 Last visit: 5/8/2024 Posts: 12257 Rating: (2666) |
Hello CPiper; Looking at the OMRON documentation, it seems that on the NS10 series, you have 2 possibilities to connect with a S7-1200: 3964 (R) protocol, used in their document by a S7-300 but supported by the S7-1200; or Modbus RTU, which is supported by the S7-1200 instructions. https://assets.omron.eu/downloads/manual/en/v3/v083_ns_series_setup_manual_en.pdf http://products.omron.us/Asset/NS_MultivendorHostConnection_UsersMan_en_201107_V092-E1-11.pdf 1.3964 (R): 4-1-2 Protocol The 3964(R) + Prodave HMI protocol is supported. In order to connect, Siemens SIMATIC S7 HMI Adapter (order number: 6ES7 972-0CA11-0XA0) is required. https://support.industry.siemens.com/cs/ww/en/view/109772940/85833863051 2. Modbus RTU: 10-1 Devices supporting the following function codes can be connected to the PT in the slave (DCE) mode of Modbus RTU protocol. (Function codes you do not use do not have to be supported.) https://support.industry.siemens.com/cs/ww/en/view/109772940/89566547339 To my view, Modbus RTU on RS-485 would be much easier to setup and expand to many HMIs, since the instructions MOD_Master and MOD_Slave are built in to the instruction set. 3964 (R) is a very old (S5 era) protocol, and allows only RS-232 connections, one per HMI. Modbus RTU would require at least one CM 1241 in the S7-1200 rack, but then again you need to design your network properly. If your OMRON supports Modbus RTU on a RS-422 or RS-485 network you could connect them in series to the PLC CM 1241 RS-485, at an overall distance of 1000 m. If it only supports Modbus RTU on its RS-232 port you would need RS-485 to RS-232 converters in the field to connect multiple HMIs, RS-232 only supports one partner, at a distance of 15 m... 6ES7241-1AH32-0XB0: Communication Module cm 1241, RS232 6ES7241-1CH32-0XB0 : Communication Module cm 1241, RS422/485 Hope this helps, Daniel Chartier |
Last edited by: dchartier at: 11/18/2020 01:19:02 |
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